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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/
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/
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
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)
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.
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)
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;
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
.

(Am. Ord. 11171, 5/20/2014; Am. Ord. 11328, 12/8/2015; Am. Ord. 11890, 12/7/2021)
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