ARTICLE 6: DIMENSIONAL STANDARDS AND MEASUREMENTS

Section

6.1.   PURPOSE

6.2.   APPLICABILITY

6.3.   DIMENSIONAL STANDARDS

   6.3.1.   Organization

   6.3.2.   Determining a Use’s Dimensional Standards

   6.3.3.   Explanation and Applicability of Terms Used in the Dimensional Standard Tables

   6.3.4.   Dimensional Standard and Exceptions Tables

6.4.   RULES OF MEASUREMENT AND EXCEPTIONS TO DIMENSIONAL STANDARDS

   6.4.1.   Purpose

   6.4.2.   Lot Size

   6.4.3.   Lot Coverage and Site Coverage

   6.4.4.   Height

   6.4.5.   Perimeter Yards

   6.4.6.   Floor Area Ratio

   6.4.7.   Residential Density

6.5.   PRINCIPAL LAND USE

   6.5.1.   One or More Principal Uses , Separate Projects

   6.5.2.   Two or More Principal Uses , Same Project

6.6.   ACCESSORY USES , BUILDINGS , AND STRUCTURES

   6.6.1.   Accessory Uses

   6.6.2.   Accessory Buildings And Structures

   6.6.3.   Residential Uses

   6.6.4.   Nonresidential Uses

   6.6.5   Urban Agriculture Uses and Activities

6.1. PURPOSE

   This article provides the general dimensional standards that apply to principal and accessory structures for each zoning district in the City . The standards are intended to protect open space , solar access , and the privacy of all properties and to minimize negative impacts between developments . This article also provides the method for measuring the dimensional standards to ensure consistent application of the standards.

6.2. APPLICABILITY

   The standards in this article apply to all principal and accessory structures and uses established in the City of Tucson.

6.3. DIMENSIONAL STANDARDS

6.3.1. ORGANIZATION

   The dimensional standards for each zone are organized into the following tables:

Table Number		Tables
6.3-1	A	Dimensional Standards for the RH, SR, SH, RX-1, & RX-2 Zones
	B	Exceptions to the RH, SR, SH, RX-1, & RX-2 Dimensional Standards
6.3-2	A	Dimensional Standards for the R-1, R-2, R-3, MH-1, & MH-2 Zones
	B	Exceptions to the R-1, R-2, R-3, MH-1, & MH-2 Dimensional Standards
6.3-3	A	Dimensional Standards for the O-1, O-2, & O-3 Zones
	B	Exceptions to the O-1, O-2, & O-3 Dimensional Standards
6.3-4	A	Dimensional Standards for the C-1, C-2, C-3, OCR-1, & OCR-2 Zones
	B	Exceptions to the C-1, C-2, C-3, OCR-1, & OCR-2 Dimensional Standards
6.3-5	A	Dimensional Standards for the P-I , I-2, & I-2 Zones
	B	Exceptions to the P-I , I-1, & I-2 Dimensional Standards
6.3-6	A	Dimensional Standards for the OS, IR, P, & RV Zones
	B	Exceptions to the OS, IR, P, & RV Dimensional Standards
6.3-7	A	Dimensional Standards for the NC, RVC, & MU Zones
	B	Exceptions to the NC, RVC, & MU Dimensional Standards

 

6.3.2. DETERMINING A USE’S DIMENSIONAL STANDARDS

   A.   To determine all of a proposed use’s required dimensional standards, refer to the following:

      1.   The applicable dimensional standard table provided in this article;

      2.   The applicable exceptions to the dimensional standard provided in this article;

      3.   The applicable use-specific standards provided in Section 4.9, Use-Specific Standards; and,

      4.   When applicable, the overlay requirements provided in Article 5, Overlay Zones.

   B.   When the standards of this Article conflict with other sections of the Unified Development Code (UDC) , the most restrictive applies except as follows. Exception: when the standards of this article conflict with the use-specific standards provided in Article 4, the use-specific standards shall control.

   C.   Dimensional standards for accessory uses , buildings , and structures are provided in Section 6.6.

6.3.3. EXPLANATION AND APPLICABILITY OF TERMS USED IN THE DIMENSIONAL STANDARD TABLES

   The following is an explanation and applicability of frequently used terms in the dimensional standard tables:

   A.   Mobile Home Dwelling

   For the purposes of determining the applicable dimensional standards, a mobile home is considered a residential use. See Section 11.3.7.C for the definition of mobile home dwelling.

   B.   Mobile Home Park

   For the purposes of determining the applicable dimensional standards, a mobile home park is considered a nonresidential use. See Section 11.3.7.C.1 for the definition of mobile home park.

   C.   Multifamily Development

   For the purposes of determining the applicable dimensional standards, multifamily development is considered a nonresidential use. See Section 11.3.7.A.3 for the definition of multifamily development .

   D.   Nonresidential Use

   For the purposes of determining the applicable dimensional standards, the following uses as defined in Section 11.3 are considered nonresidential uses:

      1.   A use from the Agricultural, Civic, Commercial, Industrial, Restricted Adult Activities, Retail, Storage, Storage, or Wholesaling Use Groups;

      2.   Group Dwelling, except as provided in Section 6.3.3.H.7;

      3.   Multifamily Development ;

      4.   Mobile Home Park; and,

      5.   Residential Care Service Uses, except as provided in Section 6.3.3.H.4.

   E.   Nonresidential Zone

   For the purposes of determining the applicable perimeter yard standard, the following are considered nonresidential zones : O-1, O-2, O-3, P, RV, NC, RVC, C-1, C-2, C-3, OCR-1, OCR-2, P-I, I-1, and I-2.

   F.   Perimeter Yard

   The perimeter yard standard is based on whether the proposed use is nonresidential or residential (Sections 6.3.3.D or .H, respectively) and the use’s adjacency to a nonresidential or residential zone (Sections 6.3.3.E or .I, respectively).

   G.   Residential Density

   The maximum permitted number of residential dwelling units per lot or size. For example:

      1/7,000 sf means that no more than one dwelling unit per 7,000 square feet is permitted.

      36/acre means that no more than 36 dwelling units per acre are permitted.

   H.   Residential Use

   For the purposes of determining the applicable dimensional standards, the following uses as defined in Section 11.3.7 are considered residential uses:

      1.   Duplex;

      2.   Manufactured Housing;

      3.   Mobile Home Dwelling;

      4.   Residential Care Service uses located or locating in an existing residential use as defined by this section;

      5.   Single-Family Dwelling, Attached;

      6.   Single-Family Dwelling, Detached; and,

      7.   Single-Family Dwellings that meet the nonconforming group dwelling criteria in accordance with Section 4.9.7.B.9.

   I.   Residential Zone

   For the purposes of determining the applicable perimeter yard standard, the following are considered residential zones : OS, IR, RH, SR, SH, RX-1, RX-2, R-1, R-2, R-3, MH-1, MH-2, MU, PAD, and PCD.

   J.   Single-family (SF) Use

   The same uses as provided in Section 6.3.3.H, Residential Use.