The purpose of the South Main Street Corridor (SMSC) Overlay Zone is to:

1. Preserve the historic character of Centerville’s South Main Street and/or encourage development that is sensitive to the City’s heritage; 
   
2. Provide a gathering space and cultural heart for the community by fostering a small town atmosphere; 
   
3. Provide a walkable streetscape that gives equal consideration to pedestrian, bicycles, and transit users, so that a safe and comfortable environment is created;
   
4. Provide continuity and sensitivity between types of differing land uses; and
   
5. Promote South Main Street as an active corridor that serves as a balance between local and regional uses.

Certain words and phrases in this Chapter, including uses, are defined in CZC 12.12 (Definitions).

The SMSC Overlay Zone is intended to be utilized for properties with frontage along the South Main Street Corridor between Parrish Lane and Pages Lane, including properties associated with the parcel having frontage or developments that are visually prominent as seen from the intersections at Parrish Lane/Main Street or Pages Lane/Main Street. The SMSC Overlay Zone is further divided into six Subdistricts that are specified or depicted in the SMSC Subdistricts Map set forth in CZC 12.48.300. The six Subdistricts include the following:

1. North Gateway Mixed-Use Subdistrict 
2. Civic/Cultural Subdistrict
3. Traditional Main Street Subdistrict
4. City Center Subdistrict
5. Residential Boulevard Subdistrict
6. Pages Lane Mixed-Use Subdistrict

Except as otherwise provided in this Chapter, an application for development within the SMSC Overlay Zone shall be submitted and processed pursuant to applicable requirements of this Title, the Centerville Municipal Code, and any rules, regulations, or standards adopted there under, including, but not limited to, conceptual, preliminary and final subdivision plats, site plans, conditional use permits, building permits, and any other needed permit or approval.

1. Rezoning Approval Process. Except as otherwise specifically provided herein, an application for rezoning of property to the SMSC Overlay Zone shall comply with the requirements for Zoning Map amendments as provided in CZC 12.21.080. 
   
2. Subdivision Approval Process. Except as otherwise specifically provided herein, an application for development within the SMSC Overlay Zone shall comply with the procedures and requirements for subdivision plat approval as provided in CMC 15 (Subdivisions). 
   
3. Site Plan Approval Process. Except as otherwise specifically provided herein, an application for construction and improvements within the SMSC Overlay Zone requiring site plan approval under CZC 12.21.110 shall comply with the requirements therein.

1. Development Characteristics. Development within the SMSC Overlay Zone shall exhibit design components and characteristics, such as those set forth below, which set the development apart from a standard subdivision and/or traditional site plan approval accomplished under this Title.
   
   1. Enhancement of the overall physical framework of the corridor including streetscape and connectivity components;
      
   2. Coordination of street trees, plantings, furniture, lamps, signs, benches, and trash cans that project a harmonious setting;
      
   3. Creating connectivity to surrounding residential areas both visually and physically through use of streetscape elements and physically through establishment of pedestrian pathways, bike accessibility, and access to future transit opportunities;
      
   4. Utilization of complimentary styles, types, and massing of structures to establish proper building orientation and architectural designs to help unify the corridor; and 
      
   5. Proper transitioning or overlapping of the varying setbacks to establish a sense of continuity along the corridor.
      
2. Evaluation Criteria. Each development proposal for development within the SMSC Overlay Zone shall be evaluated based on its compatibility with:
   
   1. The General Plan, including the South Main Street Corridor Plan set forth in Section 12-480-7; and
      
   2. The purpose and development standards of the SMSC Overlay Development Standards set forth in this Chapter.
3. Burden of Persuasion. An applicant shall have the burden of showing that the proposed uses, project design, and location of utilities and facilities meet the requirements of this Chapter.

1. North Gateway Mixed-Use Subdistrict. The following uses, as defined in this Title, shall be the permitted and conditional uses in the North Gateway Mixed-Use Subdistrict of the SMSC Overlay Zone:
   
   1. Permitted Uses:
      
      1. Permitted Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
      2. Dwelling,Town House; Dwelling, Two-Family; or Dwelling, Multiple-Family (Maximum Allowed four dwelling units per building), as part of a mixed-use development
         
   2. Conditional Uses:
      
      1. Conditional Uses, as Shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
   3. Maximum Gross Density:
      
      1. Permitted Use Density – Not more than four dwelling units per acre as part of a mixed-use development
         
      2. Conditional Use Density – Not more than six dwelling units per acre as part of a mixed-use development
         
      3. Exception – Any legal lot shall be eligible for at least two dwelling units regardless of size as part of a mixed-use development
   4. Area Exemptions/Alterations:
      1. Parrish Square Shopping Center - The Parrish Square Shopping Center shall be exempted from the SMSC Plan provisions and the following provisions shall apply:
         1. The area shall be subject to the Development Standards and Regulations of General Applicably of the Commercial-High (C-H) Zone, as listed in CZC 12.34 (Commercial Zones)  
         2. The area shall also be subject to the Design Standards, as listed in the CZC 12.63 (Parrish Lane Gateway Design Standards)
         3. The Permitted and Conditional Uses, as shown in CZC 12.36 (Table of Uses) for the C-H Zone
         4. Added Conditional Use: Storage, Climate Controlled, not exceeding 10,000 square feet within the Parrish Square Shopping Center
2. Civic/Cultural Subdistrict. The following uses, as defined in this Title, shall be the permitted and conditional uses in the Civic/Cultural Subdistrict of the SMSC Overlay Zone: 
   
   1. Permitted Uses:
      
      1. Permitted Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone.
         
   2. Conditional Uses:
      
      1. Conditional Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
3. Traditional Main Street and City Center Subdistricts. The following uses, as defined in this Title, shall be the permitted and conditional uses in the Traditional Main Street and City Center Subdistricts of the SMSC Overlay Zone:
   
   1. Permitted Uses:
      
      1. Permitted Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone.
         
      2. Restaurant, Eatery
         
      3. Dwellings, Single-Family
         
      4. East Side of Street - Dwelling, Town House or Dwelling, Two-Family (Maximum Allowed three dwelling units per building), as part of a mixed-use development
         
      5. West Side of Street - Dwelling, Town House or Dwelling, Two-Family (Maximum Allowed four dwelling units per building), as part of a mixed-use development
         
   2. Conditional Uses:
      
      1. Conditional Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
      2. Parking Garage, Public, as part of a mixed-use development
         
      3. Restaurant, General, as part of a mixed-use development
         
   3. Maximum Gross Density:
      
      1. Permitted Use Density – Not more than four dwelling units per acre as part of a mixed-use development
         
      2. Conditional Use Density – Not more than six dwelling units per acre on the East Side of Street as part of a mixed-use development, and not more than eight dwelling units per acre on the West Side of Street as part of a mixed-use development
      3. Exception — Any legal lot shall be eligible for at least two dwelling units regardless of size as part of a mixed use development
4. Residential Boulevard Subdistrict. The following uses, as defined in this Title, shall be the permitted and conditional uses in the Residential Boulevard Subdistrict of the SMSC Overlay District Zone:
   
   1. Permitted Uses:
      
      1. Permitted Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
   2. Conditional Uses:
      
      1. Conditional Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
5. Pages Lane Mixed-Use Subdistrict. The following uses, as defined in this Title, shall be the permitted and conditional uses in the Pages Lane Mixed-Use Subdistrict of the SMSC Overlay Zone:
   
   1. Permitted Uses:
      
      1. Permitted Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone
         
   2. Conditional Uses:
      
      1. Conditional Uses, as shown in CZC 12.36 (Table of Uses) for the respective underlying zone

1. Development Design Pattern Book Required. In addition to applicable requirements of this Title and other provisions of the Centerville Municipal Code, all applications for the development of property to the SMSC Overlay Zone shall include a development design pattern book. 
   
2. Development Design Pattern Book Approval. The development design pattern book shall be reviewed and approved by the City in conjunction with an application for conceptual site plan and/or conceptual subdivision acceptance within the SMSC Overlay Zone. 
   
3. Development Design Pattern Book Submittal Requirements. In addition to the conceptual site plan or conceptual subdivision plan submittal requirements of this Title, the development design pattern book shall provide and address the following:
   
   1. Written descriptions and graphic illustrations explaining how the development standards in this Chapter are to be integrated into the layout and design of the development. 
      
   2. Written descriptions and graphic illustrations explaining the proposed conceptual architectural design, building location, parking lot placement, landscaping elements, and other such related design schemes.
      
   3. Written descriptions and graphic illustrations that clearly describe how the development will compliment or relate to the streetscape pattern within the Subdistrict it is located, such relationships include, but are not limited to, street features and amenities, pedestrian pathways, and other related streetscape design elements.
      
4. Effect of Development Plan Approvals. Upon acceptance of a conceptual site or subdivision plan and the associated development design pattern book by the City, further development applications such as subdivision plat and site plan approval for development within the SMSC Overlay Zone shall comply substantially with conceptual plan and the development design pattern book.

1. Development within the SMSC Overlay Zone shall be as follows:
   
   1. Dimensional requirements for each lot type shall be as set forth in CZC 12.48.340, and other applicable requirements of this Title and the Centerville Municipal Code.
      
   2. Buildings shall be constructed substantially with rock, brick, and/or decorative concrete block for the first floor level as viewed from Main Street. Upper floors may be accented with other maintenance free materials compatible with the base floor design. 
      
   3. At least 25% of the primary building façade facing Main Street shall have upgraded architectural features, such as columns, pillars, archways, canopies, balconies, or other treatments.
      
   4. At least 15% of a secondary façade facing another non-primary street frontage shall be of upgraded architectural features. 
      
   5. At least 5% of all other façade shall be of upgraded architectural features.
      
   6. Each building on a lot with Main Street frontage shall have an entrance facing Main Street. Entrances shall be accessible to the public as a regular building entry from the public sidewalk.
      
   7. In the Traditional Main Street and City Center Subdistricts, entrances allowing public access from the sidewalk shall be provided as follows:
      1. Traditional Main Street Lot Type.  Entrances shall be provided at intervals of at least 50 feet to maximize street activity and pedestrian access opportunities and to minimize expanses of inactive building wall.
         
      2. All Other Lot Types.  Buildings shall have at least one at-grade entry door leading to Main Street and/or another fronting street (e.g. Corner Lots).  
   8. The percentage of building frontage required along the lot width may be reduced to accommodate site plan approved pedestrian plazas located between buildings. Building frontage percentage shall not be reduced to further accommodate parking beyond what is allowed according to CZC 12.48.160. Access to such pedestrian plazas shall be provided from the sidewalk.
      
   9. Pedestrian breezeways between buildings shall be a minimum of five feet in width.
      
   10. A portion of the building frontage may be setback beyond the required build-to range (RBR) up to an additional 20 feet if the space is utilized as a site plan approved courtyard or entryway that is open and accessible to the public sidewalk, limited to the following:
       1. All Lot Types. This portion may be up to 40% of the actual building frontage and shall not be used for parking area, with the following exception set forth in Subsection (B).
          
       2. Civic/Cultural Lot Types.  This portion may be up to 75% of the actual building frontage and shall not be used for public or employee parking area, but for courtyards, greenspaces, and other approved design elements.
   11. The use of front yard areas for commercial type development shall be oriented towards the pedestrian and is to include related amenities such as entrance walks, plazas, benches, bike racks, raised flower boxes, or other such features.
       
   12. Required Building Frontage shall be the percentage of the total width of the lot that is required to be used as a building wall. A porte cochere may be counted as a building wall even though it has no front or rear wall.
       
   13. Each building shall have separate walls to support all loads independently of any walls located on an adjacent lot. Buildings with side-facing windows shall provide necessary light and air shafts within their own lot without relying on the side yard of an adjacent lot.
       
   14. Front porches, balconies, or stoops may extend up to 10 feet into front yards provided that walls, screened areas, or railings that are within the front yard do not exceed 42 inches in height above the floor of the porch, balcony, or stoop.
       
   15. Parking shall be located to the rear of the building or in a side yard as allowed by the lot width and building frontage percentage requirements of the applicable lot type.
       
   16. Side areas that exceed 15 feet in width shall not be located to another side area that exceeds 15 feet in width unless the areas are used as a unified public gathering area or courtyard, or other non-turf landscaping elements (e.g. garden plots, tree groves, flower beds, etc.), and/or design features (accent walls, fencing, sculptures/public art, etc.) that is approved by the City.
       
   17. The street level and/or ground floor elevation shall be no more than the following:
       1. All Lot Types.  Twelve inches above the fronting public sidewalk elevation within the RBL or no more than 12 inches if the entrance is fronting an approved courtyard or other similar pedestrian design entry, with the following exception set forth in Subsection (B).
          
       2. Civic/Cultural Lot Types.  Twelve inches above grade of a sidewalk style pathway leading from Main Street to an entrance.
   18. Roof lines may be flat or pitched. Roofing shall not be of vivid primary colors (red, blue, yellow).
       
   19. Windows of tinted or reflective glass may not be located between two feet and nine feet above sidewalk grade on street-facing facades.

The use and development of real property in the SMSC Overlay Zone shall conform to regulations of general applicability as set forth in the following Chapters of this Title.

1. CZC 12.50 (Existing Conditions Inventory)
   
2. CZC 12.51 (Landscaping and Screening)
3. CZC 12.52 (Off-Street Parking and Loading)
4. CZC 12.53 (Sensitive Lands)
5. CZC 12.54 (Signs)
6. CZC 12.55 (Supplementary Development Standards)
7. CZC 12.56 (Temporary Uses)

1. Intent. The SMSC Overlay Zone designation is intended to be utilized for the development of the subject property in accordance with the terms and conditions of the respective zone and/or the approved development plan for the property.
   
2. Conceptual Site Plan and/or Preliminary Subdivision Plat. Rezoning of any property to the SMSC Overlay Zone shall be subject to and conditioned upon submission of a conceptual site plan and/or preliminary subdivision plat within one year from the effective date of rezoning.
   
3. Final Site Plan or Final Subdivision Plat. Rezoning of any property to the SMSC Overlay Zone is further subject to submission and approval of a final site plan and/or submission, approval, and recording of a final subdivision plat within one year from the effective date of approval of the preliminary subdivision plat(s) and/or conceptual site plan approval, as applicable.
   
4. Substantial Construction. Substantial construction for all properties within the SMSC Overlay Zone shall be commenced within one year from the date of final site plan approval or final plat recording.

The Centerville SMSC Overlay Zone is designed to implement the goals and objectives of the South Main Street Corridor Plan of the General Plan adopted by the City and set forth in Section 12-480-7 of the General Plan. The SMSC Overlay Zone is organized around the following Sections:

• South Main Street Subdistricts Regulating Plan
  
• Building Form and Site Layout Standards
  
• Streetscape (Public Space) Standards and related amenities. 
  

1. The following regulations and standards establish the parameters that guide the form of building within the SMSC Overlay Zone, including the site envelope for building placement. They direct and control the building envelope and site in regard to configuration, orientation, function, and features that define and shape the public realm. The technique of the standards is to use private buildings to define and shape the public space in a manner that makes it attractive. The standards are designed to use a minimum level of control to meet this goal. 
   
2. The Regulating Plan identifies six specific Subdistricts within the overall SMSC Overlay Zone.  Within these Subdistricts, seven unique lot types have been identified and development regulations established for each unique type. Unique lot types within the SMSC Overlay Zone are as follows:
   
   1. Corner Gateway Lot
      
   2. Civic/Cultural Lot
      
   3. City Center Main Street Lot 
      
   4. Traditional Main Street Lot
      
   5. Traditional House Lot
      
   6. TND/Mixed-Use Lot
      
   7. Brownstone/Live-Work Lot
      
3. Unique lot types may occur in more than one of the six SMSC Overlay Zone Subdistricts, and the building envelope standards for each lot type shall apply to all such lots within the SMSC Overlay Zone.  The various lot types and related development standards allowed for each of the Subdistricts are defined in the Lot Type Illustrations set forth in CZC 12.48.350. The development specifications for the various lot types include provisions for Height, Siting, and other Elements. Additionally, “Character Examples” are provided to depict simply context of the style and not the actual design height, or exterior materials of buildings. The development specifications for each lot type are designed to address the following:
   
   1. Height:
      
      1. The height of the principal building is measured in stories, with the maximum height indicated in feet.
         
      2. The maximum height is measured from the Main Street grade (i.e. top back of curb) to the top of the roof.
         
      3. Street wall or landscaping heights are relative to the adjacent sidewalk, or the ground elevation when not fronting a sidewalk.
         
   2. Siting:
      
      1. Buildings shall only occupy the specified area of the lot, as indicated on the site plans and in relation to the required building range and setbacks.
         
      2. The street frontage for corner lots shall apply to that portion of the building facing Main Street only.
         
   3. Elements:
      
      1. The primary or main wall portion of the building’s street façade that is required to be built to the Required Building Range (RBR) shall be composed as a simple plane, with interruptions only by windows, stoops or front porches, balconies, and storefronts. Recessed entry doorways are also acceptable and count toward the required built-to percentage.
         
      2. Off-street parking for vehicles shall not occupy any space in front of a building on the building lot. Parking areas located to the side of a structure where space allows shall be located at least 10 feet back from the back of the sidewalk.

1. Within the SMSC Overlay Zone, the building form, scale, mass, and uses need to be interrelated with the streetscape to encourage interaction with one another. Therefore, the expected parking lot configuration and space calculations need to be revised and even reduced to provide the impetus such for interaction.
   
2. Parking lots and their placement shall meet the following requirements:
   
   1. Parking lots are permitted only in side and rear yards as follows:
      
      1. All parking areas shall be setback a minimum of 10 feet from the front lot (property) line of the building lot.
         
      2. When parking is located in a side yard and has frontage along a public right-of-way, no more than 25% of the total site frontage or 60 feet, whichever is less, shall be occupied by the parking lot (See Figure 1 of this Section). 
         
      3. For a corner lot, the building shall be located at the corner of the lot adjacent to the intersection. The cumulative total of both frontages occupied by parking shall be no more than 25% or 60 feet, whichever is less.
         
      4. For a corner lot that has frontages on three streets, the building shall be located at the corner adjacent to the intersection. The cumulative total of the primary and secondary streets frontages occupied by parking shall be no more than 25% or 60 feet, whichever is less.
         
      5. A side yard parking lot may not be located adjacent to another side yard parking lot on an adjoining lot. Rear lots may be located adjacent to another parking area and shall be designed to allow through traffic between parking areas.
         
   2. Where an off-street parking lot is visible from the street in a side-yard, it shall be screened by either a two foot tall screen wall or 18 inch seat wall located between the parking lot and the sidewalk. Where a parking lot is adjacent to a single-family residential district, a three foot screen wall and landscaping, sufficient to screen up to the headlight level of vehicles, shall be located between the residential use and the parking lot.
      
   3. Where a parking structure is provided or parking is located on the ground level and/or below the upper stories of the building, usable building floor space to a depth of a minimum of 20 feet shall be provided in front of the parking area, along the street frontage, for the entire length of the building.
      
   4. Official government approved on-street parking located along a lot’s frontage may be credited toward meeting the parking requirements for that use.
      
   5. Driveway access to off-street parking lots shall be located to provide safe separation from street intersections. Driveways shall be aligned with driveways on the opposite side of the street or offset to avoid turning movement conflicts. Two-way driveways shall be a minimum width of 24 feet. If feasible, driveways shall not be located within 40 feet of a corner.
      
   6. New driveway accesses shall not be established onto Main Street. Exceptions shall be recognized and allowed as follows:
      
      1. For an existing legally created lot where the side and rear of the lot are not adjacent to a street and there are no other opportunities to provide needed access to the property.
         
      2. An existing legally created access is being moved to another location to meet the parking placements of this Chapter.
         
      3. An existing legally created access or accesses are being combined together to establish an access that meets the parking placements of this Chapter. 
         
      4. An existing legally created access or accesses are being expanded, pursuant to obtaining a Utah Department of Transportation (UDOT) approval.  
   7. Driveways and driveway lanes may be combined for adjacent developments and shall be subject to recordation of shared access easements for between the adjacent lots. 
      
   8. Parking may be allowed off-site according to joint use agreements or use of shared parking districts, subject to CZC 12.52.110 regarding Parking Modifications.
      
3. CZC 12.48.310 regarding the SMSC Off-Street Parking Modifications Table shall be used to modify the minimum amount of parking spaces required by CZC 12.52.300 regarding the Off-Street Parking Schedule. 
   
   Figure 1 — Example Parking Lot & Stall Arrangement
   

1. Within the SMSC Overlay Zone, the standard Landscaping and Screening requirements of CZC 12.51 (Landscaping and Screening) are also being modified to accommodate the building form and site envelope standards for the various lot types within the Subdistricts. 
2. CZC 12.48.320 regarding SMSC Landscaping Modifications shall be used, which modify the landscaping and buffer standards required by CZC 12.51 (Landscaping and Screening) as found in this Title. 

As properties on the east side of Main Street develop or redevelop within the SMSC Overlay Zone, the developer shall provide required public improvements along the property’s Main Street frontage including a four foot parkstrip and a five foot sidewalk.  The City should also work with UDOT to implement new striping along Main Street to accommodate and provide for bike lanes on Main Street from Parrish Lane to Pages Lane within the SMSC Overlay Zone.

1. For Traditional Main Street and City Center Lot Types a third story height shall be subject to Condition Use Permit approval and limited to West Side Only.
2. If lot type is used in the Traditional Main Street District, building heights shall comply with the east/west requirements for Traditional Main Street Lot Type.