Table 30-3.B.1, Base Zoning Districts Established, sets out the base zoning districts established by this Ordinance. Base zoning districts are grouped into Special, Residential, and Business districts.

Table 30-3.B.1: Base Zoning Districts Established
DISTRICT ABBREVIATION	DISTRICT NAME
SPECIAL DISTRICTS
CD	Conservation
AR	Agricultural-Residential
MA	Military / Airport
RESIDENTIAL DISTRICTS
SF-15	Single-Family Residential 15
SF-10	Single-Family Residential 10
SF-6	Single-Family Residential 6
MR-5	Mixed Residential 5
MH	Manufactured Home
BUSINESS DISTRICTS
OI	Office and Institutional
NC	Neighborhood Commercial
LC	Limited Commercial
CC	Community Commercial
MU	Mixed-Use
DT-1	Downtown - 1
DT-2	Downtown - 2
BP	Business Park
UC	Universities & Colleges
LI	Light Industrial
HI	Heavy Industrial

1. Classification of Base Zoning Districts
   Land shall be classified or reclassified into a base zoning district only in accordance with the procedures and requirements set forth in Section 30-2.C.1, Map Amendment (Rezoning).
2. Relationship to Overlay Zoning Districts
   Regulations governing development in an overlay zoning district shall apply in addition to the regulations governing development in the underlying base zoning district. If the standards governing a base zoning district expressly conflict with those governing an overlay zoning district, the standards governing the overlay zoning district shall control.
3. Organization of Base Zoning District Regulations
   Sections 30-3.C through 30-3.E set out the general purposes of each group of base zoning districts and contain subsections that set out the specific purpose, bulk, and dimensional standards for each individual base zoning district. These subsections have a common structure consisting of a purpose statement, applicable dimensional standards, a photograph showing a hypothetical preferred building form for the district, a graphic depiction of hypothetical street layout and lot patterns, and a hypothetical graphic depiction of the district's bulk and dimensional standards as applied to typical lot patterns and building forms. The building form photographs and lot pattern diagrams are for illustrative purposes only, and may not be consistent with all the dimensional requirements. In these cases, the dimensional requirements text of this Ordinance shall control. Article 30-4: Use Standards, includes Table 30-4.A, Use Table, a summary use table specifying permitted, special, and allowable uses for each of the base zoning districts and references any standards specific to individual uses.

(Ord. No. S2012-024, § 2, 11-13-2012; Ord. No. S2022-021, § 1, 09/26/2022; Ord. No. S2022-022, § 1, 09/26/2022)

Effective on: 11/18/2013

In addition to traditional development, this Ordinance also allows zero lot line development in the agricultural, residential and business districts to provide flexibility in lot layout for greater development efficiency and density and/or in addressing site constraints.  The zero lot line standards are allowed in the districts identified in Section 30-3.B.2.a, Applicability and subject to meeting certain conditions. Zero lot line development is subject to review and approval of a Major Site Plan (see Section 30-2.C.5). Zero lot line development on a tract or site smaller than three acres also requires a Special Use Permit (see Section 30-2.C.7). Zero lot line development is subject to all applicable use standards (Article 30-4), subdivision requirements (Article 30-6), and applicable design and development standards (Article 30-5).

1. Applicability
   1. Districts
      Zero lot line development is allowed in the agricultural, residential and business (AR, SF-15, SF-10, SF-6, MR-5, OI, NC, LC, CC, MU, and BP, LI and HI) zoning districts subject to specific conditions noted below.
2. Procedure
   1. Major Site Plan Required
      All applications for zero lot line development shall be reviewed as a Major Site Plan in accordance with the procedures and requirements in Section 30-2.C.5, Site Plan.
   2. Simultaneous Review
      The review of the application for a Major Site Plan, Special Use Permit, Conditional Zoning or Neighborhood Compatibility Permit (if required), and Alternative Plans (landscaping or parking, as may be applicable), or Administrative Adjustment, if requested, shall be conducted simultaneously, to the maximum extent possible.
3. Standards
   1. Density
      Zero lot line development shall comply with the maximum allowable gross density and maximum height requirements in the base zoning district where proposed, and the following standards:
   2. Required Setbacks
      Except as otherwise provided in this subsection, lots and yard setbacks internal to a zero lot line development may deviate from the minimum yard and lot area requirements, but perimeter lots must meet the front and corner side setbacks of the underlying zoning district.  However, setbacks associated with an overlay district or any applicable setbacks from natural resources shall apply to all lots within a zero lot line development.
   3. Compliance with Design Standards
      All zero lot line development regardless of size (number of units) shall comply with all applicable development standards in Article 30-5: Development Standards, including the Single-Family, Multi-Family, Commercial, Office, and Mixed-Use, Large Retail, and Transitional Standards in Article 30-5: Development Standards, as applicable. 
   4. Conditions for residential development:
      1. Orientation: Except as provided below, all dwellings on the exterior of a ZLL development that adjoin an existing street shall be oriented so that the front façade faces the adjoining street.   In the case of corner lots, the front façade shall face the street from which the dwelling derives its street address.  A dwelling may be designed to have more than one “front façade.”
         Exception (requires a Neighborhood Compatibility Permit for developments on a tract or site smaller than three acres): When rear or side yards face the adjoining existing street(s), a Type ‘A’ Property Perimeter Buffer (see Table 30-5.B.4.D.4.) shall be provided along the affected street(s).  Any fences or walls installed shall be interior to this buffer and shall comply with the design standards of Article 30-5 for fences and walls.  Gates or openings in such fences and walls may be provided for access purposes, including maintenance.   Such buffers shall be shown on any final plans, plats or deeds, as applicable.
      2. Parking:  Vehicle Use Areas on perimeter lots in single-family districts and small multifamily projects shall not exceed 50 percent of the area between the street right-of-way and the front façade of the structure(s).
      3. Neighborhood Context: When a ZLL development is proposed on a tract or site smaller than three acres along a street where the median platted lot size of the lots adjoining the street in the block in which the development is proposed is 200% or more than the minimum lot size of the underlying zoning district(s), a Neighborhood Compatibility Permit shall be required.   
      4. Tiered Development:  When a ZLL development is proposed with principal structures located behind other principal structures that front on adjoining streets and such principal structures are not “shielded” by the frontage structures for 25% or more than the length of the frontage, excluding the width of drives or streets, a Neighborhood Compatibility Permit is required on a tract or site smaller than three acres, except when the affected street or streets are four lanes or more in width.  See Figure 30-3.B.2 below. 

Figure 30-3.B.2
Shielded – No NCP Required	Not Shielded – NCP Required

(Ord. No. S2012-008, § 8, 4-23-2012; Ord. No. S2012-024, § 3, 11-13-2012; Ord. No. S2012-025, §§ 8, 16, 11-13-2012, Ord. No. S2014-006, § 2, 1-27-2014;)

Effective on: 11/18/2013