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6.4.7 RESIDENTIAL
   A.   Purpose
      This Section provides uniform methods for determining residential densities on individual .
   B.   Applicability
      Residential for all residential projects is calculated as follows.
      1.   Residential in residential projects is based on one dwelling unit per minimum size by area, exclusive of any and drainageway dedications or exclusive use easements. Because the acreage of a used for and drainageway purposes differs for each   , it is difficult to provide a simple calculation that would give an exact figure.
         The following provide two methods of calculating approximate for a . The number of units obtained through these calculations is an estimate and can only be verified by the actual design of the . Should there be a need to express a ratio per , for comparison purposes only, such ratio will be calculated using the second method assuming 30 percent of the would be used for , drainageways, or other uses whose acreage is not included to calculate allowable .
         a.   The first method of calculation gives the highest possible that can be achieved on a . However, to achieve this , the following two design criteria must be present. (See Figure 6.4.7-A Residential , Method 1)
            i.   The property can be developed without additional dedications for , drainageways, or exclusive use easements.
            ii.   Each is the minimum size permitted by the underlying .
            The , expressed in square feet, is divided by the minimum permitted by the underlying .
 
             : 71,400 square feet (sf) or 1.64
            Minimum : 7,000 sf
            Approximate No. of Units   = ÷ Minimum
                        = 71,400 sf ÷ 7,000 sf
                        = 10.2 units
                        = 10 units + .2 remainder
               Approximate    = Units ÷
                        = 10.2 units ÷ 1.64
                        = 6.22 dwelling units/
Figure 6.4.7-A Residential , Method 1
         b.   The second method assumes that the design requires dedication of either , drainageways, or exclusive use easements or will have other conditions that do not allow every square foot of the property to be included in an individual . Also, due to varying widths of and drainageway and configurations, it is impossible to an exact number of units or lots that can be achieved. Since the amount of used for , drainageways, etc., varies from to , it is necessary to approximate the amount of by percentage that will be needed for those purposes. It will be assumed, to illustrate the calculations, that 30 percent of the will be utilized for such purposes. (See Figure 6.4.7-B Residential , Method 2)
            The calculation is the , expressed in square feet, minus 30 percent of the , divided by the minimum permitted by the underlying .
 
: 87,120 square feet (sf) or 2
Minimum : 7,000 sf
for streets, etc.: 26,136 sf (approximately 30%)
Approx. No. of Units   = ( - 30% of ) ÷ Minimum
         = (87,120 sf - 26,136 sf) ÷ 7,000 sf
         = 8.71 units
         = 8 units + .71 remainder
Approx.    = Units ÷
         = 8 units ÷ 2
         = 4 dwelling units/
Figure 6.4.7-B Residential , Method 2
      2.   Residential in multifamily developed is calculated in the following manner.
         a.   Multiply the area of the , in acreage, by the (units per ratio) permitted by the underlying zoning.
               Example:
               Units Per Ratio: 15.0
                  : 6
               Calculation:
               Units per x = no. of units
               15 x 6 = 90 units
         b.   Exception. Any   or sold at to the City for public purposes is included as part of the for calculation of , provided:
            i.   The additional is less than 10 percent of the permissible for the rest of the ;
            ii.   Such dedication was not a condition of approval for applications, such as, but not limited to, or variance requests;
            iii.   Such dedication does not include   as part of a   ; and
            iv.   A legally binding agreement to or sell at to the City is submitted as part of the application.
      3.   Residential in Flexible     is based on the (as defined in Section 11.4.5 Definitions - D) of the .
(Ord. 11171, 5/20/2014)
6.5.   PRINCIPAL
6.5.1.   ONE OR MORE , SEPARATE
   One or more conducted as separate on a is considered individually in determining the respective Classes and dimensional standards
6.5.2.   TWO OR MORE , SAME
   Two or more conducted as a single , which integrates elements of the various uses, such as, but not limited to, vehicular parking, vehicular and pedestrian access, refuse collection, and loading services, as among the various uses in the , shall have dimensional standards applied as follows:
   A.   Two or More Uses, Same Dimensional Standards
   On with two or more uses that have the same dimensional standards, the dimensional standard requirements shall be applied on the as if there were only one use.
   B.   Two or More Uses, Different Dimensional Standards
    without a residential component shall calculate the residential (RAC), and the minimum standards separately for the residential use. All other uses shall use the dimensional standards of the having the least restrictive dimensional standards.
6.6.    , , AND
    and are permitted in all . Those and associated with and to a principal are accessory and subject to the provisions described below.
6.6.1.   
   In all , an shall comply with the following:
   A.   The use shall be incidental or secondary to the and is located on the same as the ;
   B.   The use shall be intended for the occupants, residents, customers, employees, lessees, or guests of the ;
   C.   The use shall not substantially alter the exterior appearance or character of the or to which it is ; and,
   D.    may be kept for personal use in all subject to Tucson Code, Chapter 4, and any applicable health regulations.
   E.   Medical Marijuana Designated Caregiver Cultivation Location
      1.   A designated caregiver may cultivate at their residence for a single qualifying patient subject to compliance with A.R.S. § 36-2806.01;
      2.   All conditions and restrictions for medical marijuana dispensary off- cultivation locations apply except that the designated caregiver cultivation location cultivation area is limited to a total 250 square feet maximum, including any storage areas; and,
      3.   More than one designated caregiver may co-locate cultivation locations as long as the total cultivation area does not exceed 250 square feet maximum, including storage areas.
   F.   Medical Marijuana Qualifying Patient Cultivation Location:
      1.   A qualifying patient may cultivate at their place of residence subject to compliance with A.R.S. § 36-2806.01; and,
      2.   A qualifying patient, cultivating marijuana, shall comply with all lawful, applicable health regulations, including those promulgated by the Arizona Department of Health Services and any other authorized regulatory agency.
(Am. Ord. 11890, 12/7/2021)
6.6.2.   ACCESSORY AND
   In all , the used for shall comply with the following:
   A.   The standards of this Section 6.6.2 apply in all to used for , except as noted in the following:
      1.   A if five feet or less in height and ten square feet or less in area, such as a doghouse, a refuse container enclosure, or play equipment.
      2.    A shelter for if six feet or less in height and 16 square feet or less in area.
   B.   An accessory shall be built only on a occupied by a principal or use;
   C.   An accessory shall be developed in accordance with the dimensional standards of the principal , except as provided by this section and, when applicable, Sections 6.6.3, Residential Uses, and 6.6.5, Uses and Activities;
   D.   An , except for an accessory , that exceeds the allowable height of a wall within a and is detached from a principal shall comply with the width standards of the principal , except that the may be built to a parcel line with the consent of the or, when separated by an alley, property owner(s) or as permitted by Section 6.6.5, Uses and Activities;
   E.    , such as light poles, flagpoles, and other tall and narrow that are similar, shall be exempt from the requirement. Amateur radio towers are exempt from the requirement and are allowed to a maximum height of 100 feet;
   F.   An accessory , except for a stable or enclosure for , may be attached to a principal , provided that its construction complies with the requirements of the principal ;
   G.   The use of solar energy collectors for the purpose of providing energy for heating or cooling shall be permitted in all , whether as part of a principal or as an accessory . Such solar collection devices shall not be included in computing ;
   H.   All for livestock and other large farm such as ratites, as defined in the Tucson Code Chapter 4, and , shall be set back at least 50 feet from all , except corrals that shall be set back ten feet from all . In addition, the proximity of corrals and barns or other for large farm from a on property shall be in accordance with Tucson Code Chapter 4, Section 4-27;
   I.   The maximum of a wall or fence within a shall be six feet; however, the wall or fence may be higher than six feet, but no higher than ten feet, if: (See Figure 6.6.1-A, Height of Wall or Fence within a Side or Rear .)
      1.   At least 75% of the area above six feet in height is left unobstructed and open through the use of architectural elements, such as arches, columns, or wrought iron;
      2.   Part of, or located on top of, a retaining wall no higher than ten feet measured from and no higher than six feet measured from the top of the retaining portion of the wall;
      3.   A greater height is required through the rezoning process or the special exception process; or,
      4.   A greater height is required by a specific standard.
   J.   In nonresidential , walls or fences, as permitted in Section 6.6.2.I above, may exceed the height standards, provided the wall or fence complies with the standards applicable to on the ;
   K.    , , and are not required to provide additional parking, and screening, or loading spaces beyond what is required of the .
Figure 6.6.1-A: Height of Wall or Fence Within a Side or Rear
(Am. Ord. 11171, 5/20/2014; Am. Ord. 11328, 12/8/2015; Am. Ord. 11890, 12/7/2021)
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