A.   Purpose. The purpose of this zone is to:

      1.   Promote the health, education, culture, and general welfare of the community;

      2.   Insure the harmonious growth and development of Pima County, by encouraging the preservation and rehabilitation of historic sites, buildings, structures, objects, districts, cultural and man-made landscapes, and archaeological sites located within historic zones; and

      3.   Protect and perpetuate the unique character of a geographic site or district where existing historic sites, objects, architecture, archaeological remains, or other tangible records of past eras can be of enduring value to the people of the county in advancing education, general welfare, civic pride, and appreciation of their cultural heritage.

   B.   Intent.

      1.   This zone is intended to ensure the preservation of significant historic and archaeological resources, and to keep them in active use or managed and in their original historic appearances, settings, and locations; preserve property values, provide for future development, and promote an awareness of Pima County's rich historical, architectural, and archaeological landmarks among residents and visitors to the community.

      2.   It is also intended that all new or remodeled structures, located within historic zones, as well as new roadways or other topographical changes, either within or at the perimeter of an historic district zone, be designed and constructed to harmonize with the structures located within their immediate vicinity.

(Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   Use.

      1.   The historic district zone and historic landmark zone are superimposed over the existing zones.

      2.   The historic district zone and historic landmark zone do not modify the uses permitted in the underlying zones, but control their implementation to:

         a.   Insure harmonious growth and development;

         b.   Prevent dilution of the zones' historic integrity; and

         c.   Encourage the retention of early structures in their original appearance and setting.

   B.   Special Exception. The provisions of this chapter, with the exception of Section 18.63.100, shall not apply to the San Xavier environs historic district (H-1) zone.

(Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   For purposes of this chapter, unless the context otherwise requires, the following words and phrases shall have the following meanings:

      1.   Historic Zone. An overlay zone that can be either a historic district zone or historic landmark zone established under this chapter.

      2.   Historic District Zone (H). A geographically defined area, formally designated by the board of supervisors, which contains related historic sites, buildings, structures, objects, archaeological sites, man-made landscapes, or spaces in their original setting.

      3.   Historic Landmark Zone (HL). A single property or site, formally designated by the board of supervisors, which contains one or more historic sites, buildings, structures, objects, man-made landscapes, or spaces in their original setting.

(Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   Criteria for Historic Designation. A historic district, site, building, structure, object, human-created, or -designed landscape, or space is subject to designation as historic, if it can:

      1.   Be authenticated as dating from a particular significant period in Pima County's history; or

      2.   Be associated with the lives of outstanding historical personages; or

      3.   Be associated with significant events or occurrences; or

      4.   Be a good example of the architectural period in which it was built and have distinguishing characteristics of an architectural style, method of construction, or be the notable work of a master builder, designer or architect; or

      5.   Contribute information of archaeological, historical, cultural, or social importance relating to the heritage of the community; or

      6.   Relate to events, personages or architectural styles which are at least fifty years old. However, outstanding examples less than fifty years should be evaluated on their own merits.

   B.   Criteria for Establishing Historic District Zones.

      1.   In determining whether an area or district shall be established as an historic district zone, the criteria of this subsection shall be applied.

      2.   Not all of the criteria need to be satisfied; however, a sufficient number of the criteria should be satisfied to comply with the purpose and intent of this chapter:

         a.   A historic district zone should include historic districts, sites, buildings, structures, objects, human-created or -designed landscapes, or spaces.

         b.   A historic district zone should include historic districts, sites, buildings, structures, objects, human-created or -designed landscapes, or spaces in their original setting which contribute to an understanding of the heritage of the community.

         c.   The historic districts, sites, buildings, structures, objects, human-created or -designed landscapes, or spaces should provide the area with a sense of uniqueness, so that it is readily distinguishable from other areas of the community.

         d.   The collection of historic districts, sites, buildings, structures, objects, human-created or -designed landscapes, or spaces should possess integrity of location, design, setting, materials, workmanship, feeling, and association, thus constituting a recognizable entity.

   C.   Criteria for Establishing Historic Landmark Zones.

      1.   In determining whether a single property or site may be established as a historic landmark zone, property must:

         a.   Include archaeological sites, historic sites, historic buildings, or historic structures which are individually listed or individually determined to be eligible for listing in the National Register of Historic Places at the local, state, or national level of significance; and

         b.   Meet one or more of the criteria of subsections 18.63.040(A) and (B).

(Ord. 2025-4, 2025: Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   Historic District Zone.

      1.   Initiation/Application. An application for designation of a historic district zone may be initiated by the owners within the proposed district zone, or their agent, or by the planning and zoning commission upon recommendation of the Pima County plans review subcommittee of the historical commission with the consent of the owners, by submitting a historic district zone application to the development services department and complying with the provisions of this subsection.

      2.   Historic District Advisory Board. Advisory boards shall be created in accordance with Section 18.63.060.

      3.   Submittal Requirements. The application shall include:

         a.   Legal description of the property;

         b.   A list by name and title, of all ownership interests in the property (e.g., individual, corporation, trust, or limited partnership);

         c.   Letter of authorization for the owners' agent (if applicable);

         d.   Site plan. The base site plan shall be drawn to scale and shall provide the following information where applicable;

            1)   The layout and elevation of all historic districts, sites, buildings, structures and objects;

            2)   Existing significant human-created or -designed landscape features and proposed landscaped areas, fences, walls;

            3)   The location of property lines and public rights-of-way;

            4)   Specifications as to type, color, and texture of exterior surfaces of all historic districts, sites, building, structures and objects;

            5)   If applicable, a sign plan, drawn to scale, showing the location, size, design, material, color, lettering and methods of attachment and illumination of all exterior signs; and,

            6)   Any additional information deemed necessary by the development services department or the cultural resources and historic preservation office to properly review the site plan.

         e.   A completed National Register of Historic Places form, or National Register nomination, or other documentation from the state historic preservation office or the conservation lands and resources department that the property is listed in or eligible for listing in the National Register of Historic Places; or

         f.   Other evidence that the property has historic significance meeting the purpose, intent, and criteria of this chapter which may include a description of the historic resources, a recommendation of approval by the Pima County plans review subcommittee of the historical commission, a statement of significance, photographs, and other forms of information; and,

         g.   Most recent (available) aerial and elevation photos.

      4.   Public Notice, Planning and Zoning Commission and Board of Supervisors Hearings. The development services department and the cultural resources and historic preservation office shall review the submittal. Once determined complete, staff shall schedule the request for public hearing before the planning and zoning commission and board of supervisors. The public review, notice and comments shall be consistent with Sections 18.91.060(B) and (C), 18.91.070, 18.91.080, as applicable, of the rezoning process except as modified by the requirements outlined in this chapter. Conditions are not required. The submittal materials, staff and historical commission reviews, recommendations, and comments shall be transmitted to the planning and zoning commission and the board of supervisors.

      5.   Staff Report. The development services department shall coordinate with the cultural resources and historic preservation office to provide a written review, analysis, and recommendation on the designation of the property(ies) as a historic district zone based on the criteria established in this chapter. The staff report may include additional considerations such as land use impacts, as applicable.

   B.   Historic Landmark Zone.

      1.   Initiation/Application. An application for designation of a historic landmark zone may be initiated by the owners of the property, or by the planning and zoning commission upon recommendation of the Pima County plans review subcommittee of the historical commission with the consent of the owners, by submitting a historic landmark zone application to the development services department and complying with the provisions of this subsection.

      2.   Criteria. Refer to Section 18.63.040 (Criteria).

      3.   Preliminary Review. Prior to submittal, the applicant shall obtain a recommendation from the Pima County plans review subcommittee of the historical commission, and the applicant shall submit that recommendation with their application. The applicant may consult with the staff of the development services department and cultural resources and historic preservation office concerning submittal requirements.

      4.   Submittal Requirements. The application shall include:

         a.   Legal description of the property;

         b.   A list by name and title, of all ownership interests in the property (e.g., individual, corporation, trust or limited partnership);

         c.   Letter of authorization for an agent;

         d.   Site plan. The base site plan that is drawn to scale and provides the following information where applicable:

            1)   The layout and elevation of all structures and other improvements, including where appropriate, driveways, and pedestrian ways;

            2)   Existing significant landscape features and proposed landscaped areas, fences, walls;

            3)   The location of property lines and public rights-of-way;

            4)   Specifications as to type, color, and texture of exterior surfaces of buildings or structures;

            5)   If applicable, a sign plan, drawn to scale, showing the location, size, design, material, color, lettering and methods of attachment and illumination of all exterior signs; and,

            6)   Any additional information deemed necessary by the development services department or the cultural resources and historic preservation office to properly review the site plan.

      e.   A completed National Register of Historic Places form, or National Register nomination, or other documentation from the state historic preservation office or conservation lands and resources department that the property is listed in or eligible for listing in the National Register of Historic Places; or

      f.   Other evidence that the property has historic significance meeting the purpose, intent, and criteria of this chapter which may include a description of the historic resources, a recommendation of approval from the Pima County plans review subcommittee of the historical commission, a statement of significance, photographs, and other forms of information; and,

      g.   Most recent (available) aerial and elevation photos.

      5.   Public Notice, Planning and Zoning Commission and Board of Supervisors Hearings. The development services department and the cultural resources and historic preservation office shall review the submittal. Once determined complete, staff shall schedule the request for public hearing before the planning and zoning commission and board of supervisors. The public review, notice and comments shall be consistent with Sections 18.91.060(B) and (C), 18.91.070, 18.91.080, as applicable, of the rezoning process except as modified by the requirements outlined in this chapter. Conditions are not required. The submittal materials, staff and historical commission reviews, recommendations, and comments shall be transmitted to the planning and zoning commission and the board of supervisors.

      6.   Staff Report. The development services department shall coordinate with the cultural resources and historic preservation to provide a written review, analysis, and recommendation on the designation of the property as a historic landmark zone based on the criteria established in this chapter. The staff report may include additional considerations such as land use impacts, as applicable.

(Ord. 2025-4, 2025: Ord. 2018-9 § 2 (part), 2018: Ord. 1985-141 § 1 (part), 1985; Ord. 1985-82 (part), 1985)

   A.   Initiation and Establishment.

      1.   A separate advisory board shall be established for each proposed historic district zone.

      2.   Applicants for each proposed historic district zone may submit to staff of the cultural resources and historic preservation office a proposed list of residents or real property owners to be considered for appointment to the historic district zone advisory board by the board of supervisors.

      3.   The plans review subcommittee of the historical commission and staff from the cultural resources and historic preservation office shall recommend a list of applicants in the special qualifications category to the board of supervisors for appointment.

      4.   The board of supervisors shall then establish the historic district zone and appoint its members.

      5.   Vacancies may be filled in the same manner.

   B.   Composition.

      1.   Each historic district zone advisory board shall consist of at least six, but not more than fifteen, members:

         a.   One-third shall be residents of the district;

         b.   One-third shall be real property owners within the district; and

         c.   One-third shall have special qualifications in architecture, history, archaeology, land use planning, landscape architecture, or related fields.

      2.   Members may be either voting or non-voting advisory members.

   C.   Terms.

      1.   The term of each member of an historic district zone advisory board is for a maximum of four years, expiring on December 31 of the fourth year. Terms may be staggered to assure continuity. Members are eligible for reappointment.

   D.   Rules and Regulations.

      1.   The members of the advisory board shall receive no compensation and shall serve at the will of the board of supervisors.

      2.   The advisory boards may adopt rules and regulations for carrying on their assigned duties.

   E.   Duties.

      1.   The historic district advisory board designated for a proposed historic district zone shall review the applications for that district and assist the planning and zoning commission in designating the boundaries of the proposed district and in selecting the sites, buildings, structures, objects, man-made landscapes, and spaces which are to be designated as historic.

      2.   The advisory board shall also review applications involving the erection or construction of a new building or structure, or the modification, addition, alteration, moving, or demolition of existing structures, objects, or landscapes located within the historic district zone.

      3.   It is intended that the advisory board continue to function after the establishment of the related historic district zone in order to:

         a.   Review applications for building permits therein;

         b.   Monitor the building process in order to assure that the external architectural character of the historic district is maintained as approved;

         c.   Maintain an inventory record of the historic district zone;

         d.   Formulate plans for the district's future; and

         e.   Keep the residents advised.

(Ord. 2025-4, 2025: Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   Historic District Development Zones. Development zone means a certain designated area around a lot, any part of which is being considered within a historic district zone, as follows:

      1.   Where a lot is located in a rural or semi-rural historic district zone in which structures are randomly and widely spaced and streets are few or nonexistent, the development zone shall be the entire historic district zone;

      2.   Where a lot is located adjacent to a historic district zone boundary, the development zone shall include that lot, all lots located within the same block not to exceed six hundred feet in either direction, and those lots located on the opposite side of any street adjoining the same block, as well as those lots located on the opposite corners, except such portions of the development zone which fall outside the boundary of the historic district zone;

      3.   Where a lot is an interior lot, the development zone includes that lot, plus those lots on either side thereof fronting on the same street in the same block not to exceed six hundred feet in either direction and all those lots on the opposite side of said street, except such portions of the development zone which fall outside the boundaries of the historic district zone;

      4.   Where a lot is a corner lot, the development zone includes that lot, plus the corner lot diagonally opposite thereto, plus all lots fronting on the same two streets in the same block not to exceed six hundred feet in either direction, and all lots on the opposite side of said street, except those portions of the development zone which fall outside the boundary of the historic district zone.

   B.   Historic Landmark Development Zones. The development zone is equivalent to the designated historic landmark zone.

(Ord. 2025-4, 2025: Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   Historic District Zone New Construction or Alterations.

      1.   The creation or construction of new buildings or structures, or the redesigning, remodeling or modification, addition, alteration, moving or demolition of existing structures in historic district zones shall comply with the provisions of this subsection.

      2.   Design Criteria.

         a.   The design shall properly preserve the historical and architectural characteristics of a historic structure, object, or man-made landscape which make it unique, and any changes shall generally conform to the character of the structures, objects, and man-made landscapes located within its development zone.

         b.   No specific architectural style shall be required for the design of a new building or other structures that have not been designated as historic. However, such buildings and structures are subject to the following:

            1)   The design of the structure shall generally conform to the character of the buildings and structures located within its development zone;

            2)   If demolished and the area left vacant, the area shall be maintained in a clean and inoffensive manner;

            3)   If demolished and the area converted to another use not requiring buildings (such as a parking lot), the area shall be buffered by landscaping or have walls or fences that conform to the character of the other buildings and structures located within its development zone;

            4)   If demolished and new structures erected, the structures shall generally conform to the character of the buildings located within their development zone.

      3.   Building Permit Criteria.

         a.   The criteria of this subsection shall be used as a guide in approving a building permit and determining if the design of a proposed structure is compatible with the collective characteristics of the buildings or structures located within its development zone. The criteria are exemplified in the latest edition of the report Tucson's Historic Districts: Criteria for Preservation and Development.

         b.   Height. New structures may be constructed no higher than the tallest conforming building located within their development zone at the time of the establishment of the historic district zone;

         c.   Setbacks. New structures must maintain the prevailing setback existing within its development zone at the time of the establishment of the historic zone;

         d.   Proportion. The relationship between the height and width of the front elevation of the building;

         e.   Recurrent alteration of solids to voids in the front facade;

         f.   Roof types;

         g.   Surface texture of buildings;

         h.   Color of buildings, trim, roof, etc.;

         i.   Site Utilization. The width of side yards as it affects the spacing between individual buildings and structures;

         j.   Projections and Recessions. Such as but not limited to the presence or absence of porches, steps, awnings, and overhangs;

         k.   Architectural Details. Such as but not limited to cornices, lintels, arches, grill work, and shutters.

         l.   Other pertinent factors generally affecting the appearance, harmony and efficient functioning of the historic district zone may be used.

      4.   Additional Criteria.

         a.   The protection of the quality of uniqueness inherent in each historic district may require additional provisions and criteria.

         b.   Such provisions and criteria may be adopted by the board of supervisors, on recommendation by the planning and zoning commission and the historical commission, following public hearings as set forth in Section 18.63.050(A)(3) through (A)(5).

      5.   Submittal Requirements and Review Procedures.

         a.   Design Plan Requirements. The design plan shall be drawn to scale and shall provide the following information where applicable:

            1)   The proposed layout of all structures and other improvements, including where appropriate, driveways, and pedestrian ways;

            2)   Existing significant landscape features and proposed landscaped areas, fences, walls;

            3)   Off-street parking;

            4)   The location of property lines and public rights-of-way;

            5)   Entrances and exits and the direction of traffic flow in and out of off-street parking areas;

            6)   The location of each parking space and areas for turning and maneuvering vehicles;

            7)   Architectural drawings or sketches, drawn to scale, including drainage plans, in sufficient detail to permit computation of yard requirements and showing all elevations of the proposed structures or other improvements as they will appear on completion of construction;

            8)   Specifications as to type, color, and texture of exterior surfaces of proposed structures;

            9)   A sign plan, drawn to scale, showing the location, size, design, material, color, lettering and methods of attachment and illumination of all exterior signs;

            10)   Any additional information deemed necessary by the zoning inspector to properly review the design plan.

      b.   Design Plan Review Procedures.

            1)   Preliminary Review.

               a)   Prior to the submittal of a design plan, the applicant may consult with the staff of the development services department and the cultural resources and historic preservation office concerning submission requirements.

               b)   It is also recommended that the applicant review the proposed design plan with the applicable historic district advisory board.

            2)   Application and Compliance Review.

               a)   Application for historic district zone design review shall be made on forms provided by the development services department and shall be accompanied by five copies of a design plan.

               b)   The zoning inspector shall review each design plan for compliance with established application requirements and shall formally accept or reject the application within two working days.

            3)   Plan Transmittal. The zoning inspector shall, within one working day, transmit a copy of the accepted design plan to the Pima County plans review subcommittee of the historical commission and one copy to the appropriate historic district zone advisory board for their review and recommendation.

            4)   Historic District Zone Advisory Board Recommendation.

               a)   The appropriate historic district zone advisory board shall submit its recommendation to the design review committee within fifteen working days.

               b)   If no recommendation is received in that time, it shall be considered approved.

            5)   Review and Decision by the Pima County Plans Review Subcommitee of the Historical Commission.

               a)   The Pima County plans review subcommittee of the historical commission shall notify the applicant and the appropriate historic district zone advisory board as to the time and place of the preliminary review and the applicant shall be heard.

               b)   The Pima County plans review subcommittee of the historical commission shall review the proposed design plan for its compliance with the purpose and intent of the historic district zone and applicable standards and criteria and shall approve, approves subject to conditions, or disapprove the design plan.

               c)   In no event shall the Pima County plans review subcommittee of the historical commission act on the proposed design without having considered the recommendations of the applicable advisory board.

               d)   After completing the preliminary review, if the Pima County plans review subcommittee of the historical commission and the historic district zone advisory board are in agreement, the Pima County plans review subcommittee of the historical commission shall forward the application to the zoning inspector for processing.

               e)   The Pima County plans review subcommittee of the historical commission may require additional information from the applicant or it may require modifications of the proposed design plan to comply with the requirements of this chapter, in which case the Pima County plans review subcommittee of the historical commission shall hold a second review.

               f)   The applicant and appropriate historic district zone advisory board shall be notified of the time and place thereof and shall be heard by the Pima County plans review subcommittee of the historical commission.

            6)   Appeals Procedure.

               a)   The decision of the Pima County plans review subcommittee of the historical commission may be appealed to the board of supervisors by:

                  i.   The applicant;

                  ii.   A member of the applicable historic district zone advisory board;

                  iii.   Any real property owners of the applicable historic district zone; or

                  iv.   Any resident of the applicable historic district zone.

               b)   Filing. The appeal shall be filed in writing with the clerk of the board of supervisors within thirty days or the action shall be final.

               c)   Notice. Notice shall be sent to the applicant, to the applicable historic district zone advisory board, and to all interested parties, indicating the time and place for appeal hearing and the applicant shall be heard.

               d)   Decision by the board of supervisors. The board of supervisors, shall uphold, modify, or reverse the decision, after considering the appeal, and the recommendations of the Pima County plans review subcommittee of the historical commission and the applicable historic district zone advisory board.

            7)   Issuance of Permits.

               a)   The central permitting office shall not issue a building permit for:

                  i.   The erection or construction of new structures;

                  ii.   The modification, addition, alteration, moving or demolition of existing structures; or

                  iii.   The installation of a sign within an historic district zone, without the written certification of the chief zoning inspector, stating that the application for such a permit has complied with all the requirements of this chapter.

               b)   The zoning inspector shall authorize the issuance of a building permit only upon approval of a design plan in accordance with the procedures of this section.

   B.   Historic Landmark Zone New Construction or Alterations.

      1.   Additional Construction or Alterations. An application for the creation or construction of new buildings or structures, or the redesigning, remodeling or modification, addition, alteration, or moving of existing historic buildings, historic structures, or historic objects, human-created or -designed landscapes, or spaces in historic landmark zones may be initiated by the owners of the property and submitted to the development services department, and shall comply with the provisions of this subsection.

      2.   Criteria.

         a.   The design shall properly preserve historical and architectural characteristics of historic site, historic building, historic structure, historic object, or human- created or designed landscape or space which make it unique, and any changes shall generally conform to the intrinsic and unique character of the existing historic landmark zone.

         b.   Height. No higher than the tallest existing and conforming building taking into account similar types and styles of buildings such as a main or accessory structure;

         c.   The following features shall be generally consistent with the existing historic building(s) and/or historic structure(s), with the prevailing existing structural proportions, and with the historic period in which the existing structure was built: Front setbacks; roof types regarding architectural configuration, mass, and materials; building surface texture; site utilization; projections and recessions such as but not limited to porches, steps, awnings, overhangs, entrances, and windows; architectural details such as but not limited to cornices, lintels, arches, grillwork, and shutters, window and door trims, and canales; building form regarding size, mass, and scale; and rhythm regarding proportion and pattern;

         d.   To provide flexibility in the review of applications, other pertinent factors generally affecting the appearance, harmony, and efficient functioning of the historic landmark zone may be considered as appropriate such as: color and landscaping consistent with the style of the building or structure and with the historic period; enclosures compatible with architectural style and not blocking views of the primary façade from public viewpoints; utilities located underground where possible and the use of utility boxes on front façades reviewed for appropriateness and compatibility; and compatibility of the appearance, color, size, position, method of attachment, texture of materials, and design of signs.

      3.   Preliminary Review. Prior to submittal, the applicant shall obtain a recommendation from the Pima County plans review subcommittee of the historical commission, and the applicant shall submit that recommendation with their application. The applicant may consult with the staff of the development services department and the cultural resources and historic preservation office concerning submittal requirements.

      4.   Submittal Requirements. Based on the original or base site plan and highlighting the proposed amendments, an amended site plan shall be drawn to a legible scale and shall provide the following information where applicable, plus the most recent aerial and elevation photos, and written reasons for the proposed changes:

         a.   Legal description of the property;

         b.   A list by name and title, of all ownership interest in the property (e.g., individual, corporation, trust or limited partnership);

         c.   Letter of authorization for an agent;

         d.   Site plan.

            1)   The layout and elevation of all structures and other improvements with amended features highlighted, including where appropriate, driveways, and pedestrian ways;

            2)   Existing significant landscape features and proposed landscaped areas, fences, walls;

            3)   The location of property lines and public rights-of-way;

            4)   Architectural drawings or sketches, drawn to a legible scale in sufficient detail to show all elevations of the proposed structures;

            5)   Specifications as to type, color, and texture of exterior surfaces of proposed structures;

            6)   If applicable, a sign plan, drawn to a legible scale, showing the location, size, design, material, color, lettering and methods of attachment and illumination of all exterior signs;

            7)   Any additional information deemed necessary by the development services department or the cultural resources and historic preservation office to properly review the site plan.

         e.   Written support for the proposed changes;

         f.   Most recent (available) aerial and elevation photos.

      5.   Public notice, Planning and Zoning Commission and Board of Supervisors Hearings. The development services department and cultural resources and historic preservation office shall review the submittal. Once determined complete, staff shall schedule the request for public hearing before the planning and zoning commission and board of supervisors. The public review, notice and comments shall be consistent with Sections 18.91.060(B) and (C), 18.91.070, 18.91.080, as applicable, of the rezoning process except as modified by the requirements outlined in this chapter. The submittal materials, staff and historical commission reviews, recommendations, and comments shall be transmitted to the planning and zoning commission and the board of supervisors.

      6.   Staff Report. The development services department shall coordinate with the cultural resources and historic preservation office to provide a written review, analysis, and recommendation on the requested additional construction or alteration of the historic landmark zone based on the criteria established in this chapter.

(Ord. 2025-4, 2025: Ord. 2018-9 § 2 (part), 2018: Ord. 1985-144 § 1 (part), 1985; Ord. 1985-82 (part), 1985)

   A.   Historic District Zone.

      1.   Scope.

         a.   No permit shall be issued by the building official for demolition of all or any significant part of a structure or building which has been designated as historic prior to a review and recommendation from the Pima County plans review subcommittee of the historical commission for consideration and subsequent permit approval by the planning and zoning commission.

         b.   In making their decision, the Pima County plans review subcommittee of the historical commission and the planning and zoning commission shall determine if the applicant has shown that the preservation of the structure is physically and/or economically unfeasible.

      2.   Historical Commission Action.

         a.   If the Pima County plans review subcommittee of the historical commission finds that preservation is physically and/or economically unfeasible, such finding shall be included in its recommendation.

         b.   If the preservation of the structure is found to be feasible, the Pima County plans review subcommittee of the historical commission shall make a recommendation to notify persons or groups interested in historic preservation who may attempt to convince the owner to preserve the building or structure; or, if the owner does not agree, to attempt to have the property purchased by someone who will agree to preserve the building or structure in accordance with the provisions of this chapter.

         c.   Staff from the cultural resources and historic preservation office and the development services department shall include the Pima County plans review subcommittee of the historical commission's findings in their report to the planning and zoning commission.

      3.   Planning and Zoning Commission Action.

         a.   If preservation of the building or structure is found to be physically and/or economically unfeasible, the planning and zoning commission shall notify the zoning inspector that the issuance of the demolition permit is approved. The site may be left vacant or a new building constructed in accordance with the provisions set forth in Section 18.63.070(B) and (C).

         b.   If the planning and zoning commission finds that preservation of the structure is feasible, the planning and zoning commission shall notify persons or groups interested in historic preservation who may either attempt to convince the owner to preserve the building or structure or, if the owner does not agree, to attempt to have the property purchased by someone who will agree to preserve the building or structure in accordance with the provisions of this chapter.

         c.   If the owner is not convinced to retain the building or structure and does not make an agreement to that effect and no one has agreed to purchase it within one hundred eighty days after public notification of the application for a demolition permit, the commission shall notify the building official that the issuance of a permit to demolish the building or structure is approved and the provisions set forth in Section 18.63.070(B) and (C) shall apply.

      4.   Authority of the Building Official. Approval by the planning and zoning commission of the issuance of a permit does not mandate the granting of a permit by the building official if the official should find reasons and deny it under other provisions of the county building code (Title 15).

   B.   Historic Landmark Zone. Demolition of historic buildings, historic structures, or historic objects, human-created or -designed landscapes, or spaces.

      1.   Demolition. An application for demolition on site may be initiated by the owners of the property and submitted to the development services department, and shall comply with the provisions of this subsection.The development services department shall not consider an application for demolition if the board of supervisors has denied a demolition request on the same property within the previous thirty-six months.

      2.   Criteria. The intent of this section is to preserve the historic and architectural resources within a historic landmark zone in their original appearance, setting, and placement. Demolition of a historic landmark can cause an irreplaceable loss to the quality and character of Pima County. However, it is recognized that there can be circumstances beyond the control of a property owner that may result in the necessary demolition of a structure within a historic landmark zone.

      The applicant shall submit evidence meeting one or more of the following criteria:

         a.   The structure or site is of no historic or architectural value or significance and does not contribute to the historic value of the property;

         b.   Loss of the structure would not adversely affect the integrity of the historic landmark zone;

         c.   The owner will not have a reasonable economic use of the property if a demolition permit is not approved;

         d.   Preservation is physically and/or economically unfeasible;

         e.   Reasonable measures cannot be taken to save the site, building, structure, object, man-made landscape, or space in their original setting from further deterioration, collapse, arson, vandalism, or neglect; and

         f.   Adequate discussion regarding alternatives to demolition has occurred. If potential parties of interest in the historical preservation community have been contacted and incorporated into the discussion of alternatives.

      3.   Preliminary Review. Prior to submittal, the applicant shall obtain a recommendation from the Pima County plans review subcommittee of the historical commission which shall be submitted with their application. The applicant may consult with the staff of the development services department and the cultural resources and historic preservation office concerning submittal requirements.

      4.   Submittal Requirements. The cultural resources and historic preservation office shall determine the required evidence for a complete demolition submittal. Evidence may include and be submitted in the form of:

         a.   Most recent assessed values and appraisals of the land and improvements;

         b.   Title/title acquisitions;

         c.   real estate taxes for the previous two years;

         d.   Any annual debt service documentation for the previous two years;

         e.   Sale or rent listings; any consideration by the owner as to profitable adaptive uses for the property;

         f.   Rehabilitation cost estimates; annual gross income from the property for the previous two years;

         g.   Itemized operating and maintenance expenses for the previous two years;

         h.   Annual cash flow for the previous two years;

         i.   Proof of effort toward attaining a reasonable return; and

         j.   Other applicable materials.

      5.   Public notice, Planning and Zoning Commission and Board of Supervisors Hearings. The development services department, and the cultural resources and historic preservation office shall review the submittal. Once the submittal is determined to be complete , development services staff shall schedule the request for public hearing before the planning and zoning commission and by the board of supervisors. The public review, notice, and comments shall be consistent with Sections 18.91.060(B) and (C), 18.91.070, and 18.91.080 as applicable.

      6.   Staff Report. The development services department shall coordinate with the cultural resources and historic preservation office to provide a written review, analysis, and recommendation on a requested demolition on the historic landmark zone property based on the criteria established in this chapter.

(Ord. 2025-4, 2025: Ord. 2018-9 § 2 (part), 2018: Ord. 1985-82 (part), 1985)

   A.   Purpose. The purpose of this zone is to promote the public health, safety, convenience and general welfare through conservation of the historical heritage of Pima County by delimiting an area of influence from an established historic site and by providing for certain appropriate controls.

   B.   Definitions.

      1.   Established historic site. A registered national historic landmark or historic place (or state of Arizona historic landmark or historic place) as incorporated in the National (or State) Register of Historic Places.

   C.   Use Restrictions Zone A.

      1.   Scope. Within an area of one mile from an established historic site, the additional regulations of this subsection shall apply and shall be superimposed over an existing zone.

      2.   Density. The density shall not exceed two living units per thirty-six thousand square feet of lot area.

      3.   Development Standards.

         a.   No off-site signs shall be permitted, and all on-site signs shall comply with the sign regulations in 18.79.050(O) (Sign Standards).

         b.   All outdoor lighting shall be in accordance with the county outdoor lighting code (Title 15).

         c.   Commercial and industrial uses shall also comply with Section 18.63.100(C)(3)(b) and (C)(3)(c). All developments shall provide planting screens or approved walls on the side or sides oriented towards the historic site no less than six feet in height.

         d.   Regardless of any other regulation no structure shall exceed two stories (maximum height: Thirty feet).

         e.   The requirements of this section shall not apply to the alteration of another established historic site within the influence zone.

         f.   The color of all structures shall be earth tones.

         g.   The planning and development services director shall require landscaping appropriate to the natural vegetation of the area.

   D.   Use Restrictions Zone B.

      1.   Scope. Within an area of one and one-quarter of a mile and one mile from an established historic site, the additional regulations of this subsection shall apply and shall be superimposed over an existing zone.

      2.   Density. A density of four units per thirty-six thousand square feet shall be permitted; provided, that the developer obtain the proper zoning as provided in Chapter 18.91 (Zoning Code Amendments and Zone Changes);

      3.   Development Standards. In accordance with Section 18.63.100(C)(3).

   E.   Use Restriction Zone C.

      1.   Scope. Within an area of one and one-half of a mile to one and one-quarter mile from an established historic site, the additional regulations of this subsection shall apply and shall be superimposed over an existing zone.

      2.   Density. A density of six units per thirty-six thousand square feet shall be permitted, provided that the developer obtain the proper zoning as provided in Chapter 18.91 (Zoning Code Amendments and Zone Changes);

      3.   Development Standards. In accordance with Section 18.63.100(C)(3).

   F.   The cultural resources and historic preservation office and the development services department shall review all development plans within a mile and one-half of the San Xavier Mission for conformance to this section, and consult with the Tohono O'odham Nation, as appropriate. Appeals shall be directed to the board of supervisors.

(Ord. 2025-4, 2025: Ord. 2011-2 § 15 (part), 2011; Ord. 1985-141 § 1 (part), 1985; Ord. 1985-82 (part), 1985)

   San Xavier environs historic zone (H-1) map: See Map 18.63.110A.

(Ord. 2025-4, 2025: Ord. 1985-82 (part), 1985)

Map 18.63.110A