Zoneomics Logo
search icon

Firestone City Zoning Code

CHAPTER 4

Dimensional Standards

Sections:


16.4.1 - Table of dimensional standards.

This Section contains tables that list the requirements for lot dimensions and building bulk, density, location, and height for all types of development. All primary and accessory structures are subject to the dimensional standards set forth in the following tables. These general standards may be further limited or modified by other applicable Sections of this FDC. General rules for measurement and exceptions are in Section 16.4.2.

A.

Dimensional and Density Standards.

TABLE 4-1: DIMENSIONAL AND DENSITY STANDARDS—RESIDENTIAL AND COMMERCIAL DISTRICTS
(Additional standards may apply. See Use-Specific Standards in Section 16.3.2)
District Max/Min Density (DU/Acre) Minimum Lot Standards Minimum Setbacks (ft.)② Max Height (ft)
Width
(ft)④
Net Area
(sq ft)③
Front Street
(all uses)
Interior Lot Line Rear
RR 1/na 100
(Flag lots: 50)
43,560 Principal: 30
Accessory: 40
30 10 Principal: 30
Accessory: 10
40
R-A 5/na SFD: 45
Corner: 55

SFD-Alley: 35
Corner: 45
SFA: 35
Corner: 45
SFA-Alley: 20
Corner: 30
MF: none
SFD: 4,500
SFD-Alley: 3,000
SFA: 2,000
SFA-Alley: 1,500
SF-Motor Court: 2,500
MF: 1,500 per DU
Principal SF: 14
10 for alley loaded
20 to front load garage
5 to Motor Court
2 to Garden Court
Principal MF: 20
Accessory: 30
SF: 10
MF: 20
Principal SF: 5①
Principal MF: 10①
Accessory: 5①
Principal SFD: 20
SFD-Alley: 2
Principal SFA: 15
SFA-Alley: 2
SF-Motor Court: 10
Principal MF: 20
Accessory SF: 5
Accessory MF: 10
Prin-SF: 35
SF-MC: 45
Prin-MF: 45
Acc: 25
R-B 10/5
R-C 20/10

 

① Zero lot line setbacks shall be permitted for attached buildings provided that the building meets the zone district interior lot line setback on the side of the building not attached.

② Multiple principal buildings on a single lot shall be separated a distance equal to the distance that would be required if they were separated by a lot line.

③ Net area is the size of the lot; not to include tracts and streets and their rights-of-way.

④ Single family lots facing a motor court may be reduced by five (5) feet from their respective minimum lot widths.

District Max/Min
Density
(DU/Acre)
Minimum Lot Standards Minimum Setbacks (ft.)② Max Height
(ft)
Width
(ft)
Net Area
(sq ft)③
Front Street
(all uses)
Interior Lot Line Rear
OTR SFD: 5/na
SFA: 10/na
SF: 50
SFA: 25
SFD: 5,000
SFA: 2,500 per DU
Principal SF: 14
10 for alley loaded
20 to front load garage
Accessory: 30
SF: 10 Prin: 5①
Acc: 5①
Principal SF: 20
2 for alley loaded
Accessory SF: 5
Prin: 35
Acc: 25
OTC N/AN/A0 0 0 0 Prin: 20
Acc: 5
Prin: 35
2 stories max
Acc: 20
NC N/A N/A Principal: 20
Accessory: 30
20 Prin: 10①
Acc: 5
Principal: 20
Accessory: 5
Prin: 35'
Acc: 25
RC Prin: 45'
LI 45
Acc: 25

 

① Zero lot line setbacks shall be permitted for attached buildings provided that the building meets the zone district interior lot line setback on the side of the building not attached.

② Multiple principal buildings on a single lot shall be separated a distance equal to the distance that would be required if they were separated by a lot line.

③ Net area is the size of the lot; not to include tracts and streets and their rights-of-way.

B.

Other districts standards.

TABLE 4-3: TABLE OF DIMENSIONAL STANDARDS - OTHER DISTRICTS
(Additional Standards May Apply. See Use-Specific Standards in 3.2.)
District Min. Lot Size Minimum Setbacks (ft.) Maximum Height
Net Area
(sq. ft.)③
Width (ft.) Front Side Rear Prin. Acc.
AG 87,120 100
(Flag lots: 50)
50 30 50 35 40
OS N/A N/A 20 20 20 35 20
PLI N/A N/A Front, side and rear yard setbacks shall be 25 feet when the abutting district is AG, OS, or any residential property. Otherwise, the setbacks shall be equal to the analogous minimum setback in the abutting district. 45 35
DR N/A N/A N/A N/A N/A

 

① Zero lot line setbacks shall be permitted for attached buildings provided that the building meets the zone district interior lot line setback on the side of the building not attached.

② Multiple principal buildings on a single lot shall be separated a distance equal to the distance that would be required if they were separated by a lot line.

③ Net area is the size of the lot; not to include tracts and streets and their rights-of-way.

(Ord. No. 1022, § 1, 12-14-2022; Ord. No. 1003, § 8, 12-8-2021; Ord. 982 § 3, Att., 2020)

16.4.2 - Measurements and exceptions.

A.

Setbacks.

1.

General setback requirements.

a.

Required setbacks. Setbacks shall be unoccupied and unobstructed by any structure or portion of a structure from thirty (30) inches above grade upward; provided, however, that fences, walls, trellises, poles, posts, ornaments, furniture and other customary yard accessories may be permitted in any setback subject to height limitations and requirements limiting obstruction of visibility.

i.

A building, structure, or lot shall not be developed, used, or occupied unless it meets the minimum setback requirements set forth in Table 4-1 for the zoning district in which it is located, except as otherwise established in this FDC or unless a variance has been granted.

ii.

A setback or other open space required by this FDC shall not be included as part of a setback or other open space required by this FDC for another building or structure or lot.

b.

Encroachments into required setbacks, general. The following structures may encroach into required front, side or rear setbacks as specified in this Subsection and as permitted by building code:

i.

Paved patios or terraces. Paved patios or terraces may encroach into any required setback, provided that no structures placed on them shall violate other requirements of this FDC.

ii.

Unroofed landings, decks and stairs. Unroofed landings, decks and stairs may encroach into side and rear required setbacks, provided that the floor shall not extend higher than thirty (30) inches above the finished grade level and the projection is at least five (5) feet from the lot line.

iii.

Covered decks, covered patios, and exterior balconies. Covered decks, covered patios, and exterior balconies may encroach into a required rear setback provided these encroachments are at least ten (10) feet from the rear lot line.

iv.

Incidental architectural features. Cornices, eaves, canopies, chimneys, bay windows, ornamental features, and other similar architectural features may encroach not more than two (2) feet into any required setback. Window well openings may encroach not more than three (3) feet into any required setback.

v.

Covered porches and roofs over other exterior approaches. Roofs over porches, stairways, landings, terraces, or other exterior approaches to pedestrian doorways may project up to four (4) feet into a front setback. The projection shall be at least ten (10) feet from the front property line.

vi.

Handicap ramps. The Director may allow the installation of handicap access ramps in required front, side, and rear setbacks. The design and placement of the ramps shall be reviewed to ensure that:

(A)

The ramp has minimal visual impact on abutting properties;

(B)

The width of the ramp does not exceed forty-eight (48) inches except as required by law.

vii.

Fences and walls. Fences and walls may project into any required setback and shall be in accordance with other requirements of this FDC.

viii.

Driveways. Residential driveways may encroach into any required interior side setback provided these encroachments are at least three (3) feet from the side lot line and do not impact drainage conveyance or utilities.

c.

Encroachments into easement and rights-of-way prohibited. Encroachments shall not extend into any easement(s) or public right-of-way except as legally authorized by the easement holder.

d.

Contextual front setbacks. In addition to permitted projections described in Subsection 16.4.2.A.1.b above, the following exceptions to the front setback requirement for dwellings abutting local streets (not collector or arterial streets) are authorized for a lot in any district.

i.

If there are dwelling units on both abutting lots with front setbacks of less than the required depth for the district, the front setback for the lot need not exceed the average front yard of the abutting dwelling units.

ii.

If there is a dwelling unit on one (1) abutting lot with a front setback of less than the required depth for the district, the front setback for the lot need not exceed a depth one-half (½) way between the depth of the abutting lot and the required setback depth.

iii.

Regardless of contextual front setback, any garage portion of the dwelling facing the front or street side shall have a setback of twenty (20) feet.

e.

Corner sight distance (a.k.a. sight or vision clearance triangle). Where a driveway or private street intersects a public right-of-way or where property abuts the intersection of two (2) public rights-of-way, unobstructed sight distance as described in the Town Standards and Specifications shall be maintained at all times within the sight triangle area on the property adjacent to the intersection in order to ensure that safe and adequate sight distance is provided for the public use of the right-of-way.

B.

Height exceptions for appurtenances. Except as specifically provided elsewhere in this FDC, the height limitations contained in this FDC do not apply to spires, belfries, cupolas, chimneys, heating and ventilation equipment, elevator housings, stairwell towers or similar appurtenances; provided, however, the following:

1.

The appurtenance does not interfere with FAA Regulations;

2.

The appurtenance does not extend more than twenty-five (25) feet above the maximum permitted building height;

3.

The appurtenance is not constructed for the purpose of providing additional occupiable floor area in the building; and

4.

The appurtenance complies with the screening requirements for mechanical equipment and appurtenances in Subsection 16.6.4.G.

(Ord. No. 1022, § 2, 12-14-2022; Ord. No. 1003, §§ 9, 10, 12-8-2021; Ord. 982 §§ 4, 5, Att., 2020)