4.2.2 GENERAL DIMENSIONAL STANDARDS SUMMARY TABLES | Aurora Unified Development Ordinance

4.2.2. GENERAL DIMENSIONAL STANDARDS SUMMARY TABLES.

All development and redevelopment shall comply with the standards in this Section 146-4.2.2 (General Dimensional Standards Summary Tables) unless another Section of this UDO provides an alternative standard for a particular use, layout, or development type. Sections of this UDO that may provide alternative standards include but are not limited to Sections 146-3.3 (Use-Specific Standards), 146-4.2.3 (Special Dimensional Standards), 146-4.2.4 (Exceptions and Encroachments),146-4.4 (Neighborhood Protection Standards), and 146-4.64.6 (Parking, Loading, and Stacking).

1. The dimensional standards for residential districts shown in Table 4.2-1 shall apply to all development in the listed zone districts in Subareas A and B.

Table 4.2-1 Summary of Residential Districts Dimensional Standards – Subareas A and B See additional standards in Section 146-2.3 (Residential Districts)
Zone District	R-R	R-1	R-2	R-3	R-4	R-MH
Density and Lot Standards [Also See Small Residential Lot Options in Section 146-4.2.3.B]
Residential density, maximum	N/A					Manufactured housing: 10 du/ac. Co-housing or Cottage housing: 12 du/ac. Tiny houses: 15 du/ac.
Lot area, minimum
Single-family detached	43,560 sf.	6,000 sf. [1]		5,000 sf.		[2]
Two-family	N/A		3,000 sf.			N/A
Single-family attached fronting a public street or a private street meeting public street standards [3]	N/A		1,600 sf.			N/A
Multifamily	N/A		7,000 sf.			N/A
Other permitted or approved conditional use	7,000 sf.					N/A
Lot frontage at front lot line, minimum
Single-family detached	120 ft.	Subarea A: 50 ft. Subarea B: 60 ft.		50 ft.		N/A
Two-family	N/A		30 ft.			N/A
Single-family attached fronting a public street or a private street meeting public street standards [3]	N/A		20 ft.	18 ft.		N/A
Multifamily	N/A		60 ft.			N/A
Other permitted or approved conditional use	60 ft.					N/A
Lot frontage (cul-de-sac or curved frontage), minimum	60 ft.	35 ft.	N/A			N/A
Setbacks, Minimum
Front	30 ft.	25 ft. [4]	20 ft. [4]	15 ft.	12 ft.	15 ft.
Side
Interior [5]	10 ft.	5 ft. [6]	5 ft.[6]	5 ft.		5 ft.
Abutting a local street	25 ft.	12.5 ft.	10 ft.	10 ft.	7.5 ft.	15 ft.
Abutting a collector or arterial street	25 ft.		20 ft.	Collector: 25 ft. Arterial: 30 ft.		15 ft.
Non-residential use abutting residential use	25 ft.					N/A
Rear
General	25 ft.	20 ft.	15 ft.	10 ft.		8 ft.
Non-residential use abutting residential use	25 ft.					N/A
Building separation between units, minimum	N/A					15 ft. min. general, 8 ft. min. side-to-end, 6 ft. min. end-to-end
Building Standards
Building height, maximum	38 ft.			45 ft.[7]	65 ft.[8]	20 ft.[9]
Notes: [1] In Subarea A, when a lot or parcel is subdivided or resubdivided for single-family detached or two-family dwelling structures, and any residentially zoned or residentially developed land abutting the lot or parcel to be subdivided or resubdivided contains single-family detached or two-family dwelling structure, the minimum lot area of lots created through the subdivision shall not be smaller than the smallest abutting lot occupied by a single-family detached or two-family dwelling structure, nor larger than the largest abutting lot occupied by a single-family detached or two-family dwelling structure. [2] 1,000 sf. per manufactured home, or 1.5 times the gross floor area of all manufactured homes, whichever is larger [3] Only alley-loaded residential product permitted. Single-family attached products that do not front on a public street or a private street meeting public street standards shall comply with the requirements for Green Court Dwellings. [4] In Subarea A, when lots on both sides of the subject lot are developed with single-family detached or two-family dwelling structures, and the front setbacks on those single-family or two-family structures are not larger than 30 feet, the front setback shall be no further from the street than the further of the two adjacent structures, and no closer to the street than the closer of the two adjacent structures. [5] Single-family attached dwellings have an interior side setback of 0 ft. [6] In Subarea A, When lots on both sides of the subject lot are developed with single-family detached or two-family dwelling structures, and the side setbacks on those single-family or two-family structures are not larger than 10 feet, the side setback shall be no smaller than the smallest of the side setbacks on either abutting lot, and no larger than the largest of the side setbacks on either abutting lot”. [7] Portions of Affordable Housing structures located more than 75 feet from an R-R, R-1, or R-2 zone district have a maximum height of 55 feet. [8] Portions of Affordable Housing structures located more than 75 feet from an R-R, R-1, or R-2 zone district have a maximum height of 75 feet. [9] Common area structures have a maximum height of 30 feet.

2. The dimensional standards for residential districts shown in Table 4.2-2 shall apply to all development in the listed zone districts in Subarea C, unless an applicant uses the optional standards available in Section 146-4.2.3.A (Subarea C Small Residential Lot Standards). All development required to comply with Table 4.2-2 shall also comply with the requirements of Section 146-4.6.5 (Parking Design and Location), and the event of a conflict between required dimensions in Table 4.2-2 and Section 146-4.6.5, the requirements of Section 146-4.6.5 shall apply.

Table 4.2-2 Summary of Residential Districts Dimensional Standards – Subarea C
Applies when Small Residential Lot Option is not being used
See additional standards in Section 146-2.3 (Residential Districts)
Zone District	R-R	R-1	R-2	R-3	R-4	R-MH
Density and Lot Standards [Also See Small Residential Lot Options in Section 146-4.2.3.B]
Residential density, maximum	N/A	3 du/ac	5 du/ac	N/A	N/A	Manufactured housing: 10 du/ac. Co-housing or Cottage housing: 12 du/ac. Tiny houses: 15 du/ac.
Lot area, minimum
Single-family detached (Standard/Small)	43,560 sf. / N/A	4,500 sf. / See Table 4.2-5		4,500		N/A
Two-family (Front Load / Alternate-Load	N/A / N/A	3,200 sf. / 1,250 sf.				N/A
Single-family attached fronting a public street or a private street meeting public street standards [1]	N/A	1,380 sf. for end units and 1,250 sf. for interior units				N/A
Multifamily	N/A	7,000 sf.				N/A
Other permitted or approved conditional use	7,000 sf.
Lot frontage at front lot line, minimum
Single-family detached (Standard / Small)	120 ft.	50 ft. / See Table 4.2-5		50ft.		N/A
Two-family (Front-load/Alternate Load)	N/A	40 ft. / 25 ft. per lot				N/A
Single-family attached fronting a public street or a private street meeting public street standards [1]	N/A	20 ft. for end units and 18 ft. for interior units				N/A
Multifamily	N/A	60 ft.				N/A
Other permitted or approved conditional uses	60 ft.					N/A
Lot frontage (cul-de-sac or curved frontage), minimum	60 ft.	35 ft.	N/A			N/A
Setbacks, Minimum
Front	30 ft.	20 ft.	20 ft.[2]	15 ft.	12 ft.	15 ft.
Side
Interior [3]	10 ft.	5 ft.	5 ft.	5 ft.		5 ft.
Abutting a local street	25 ft.	12.5 ft.	10 ft.	10 ft.	7 ft.	15 ft.
Abutting a collector or arterial street	25 ft.	20 ft.		Collector: 25 ft. Arterial 30 ft.		15 ft.
Non-residential use abutting residential use	25 ft.		20 ft.	25 ft.		N/A
Rear
General	25 ft.	20 ft.	15 ft.	10 ft.		8 ft.
Non-residential use abutting residential use	25 ft.		20 ft.	25 ft.		N/A
Building separation between units, minimum	N/A					15 ft. min. general, 8 ft. min. side-to-end, 6 ft. min. end-to-end
Building Standards
Building height, maximum	38 ft.			45 ft.[4]	65 ft.[5]	20 ft.[6]
Notes: [1] Only alley-loaded residential product permitted. Single-family attached dwelling units that do not front on a public street or a private street meeting Aurora public street standards shall comply with the requirements for Green Court Dwellings or Motor Court Dwellings. [2] Must comply with Section 146-4.6.5.C. [3] Single-family attached dwellings have an interior side setback of 0 ft. [4] Portions of Affordable Housing structures located more than 75 feet from an R-R, R-1, or R-2 zone district have a maximum height of 55 feet. [5] Portions of Affordable Housing structures located more than 75 feet from an R-R, R-1, or R-2 zone district have a maximum height of 75 feet. [6] Common area structures have a maximum height of 30 feet.

B. Mixed-Use Districts. Dimensional standards for mixed-use districts are shown in Table 4.2-3.

Table 4.2-3 Summary of Mixed-Use Districts Dimensional Standards
See additional standards in Section 146-2.4 (Mixed-Use Districts)
Zone District	MU-N	MU-OI	MU-C	MU-OA	MU-FB	MU-TOD	MU-R	MU-A
Project and Site Standards
Contiguous and adjacent area, minimum	N/A	N/A	40 ac [1]	N/A	N/A	N/A	40 ac [2]	N/A
Contiguous and adjacent area, maximum	10 ac [1]	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Residential density	16 du/ac max.	N/A	N/A	N/A	25 du/ac min.	Core: 60 du/ac, min. Edge: 20 du/ac, min.	N/A	40 du/ac, max.
Lot area and lot width, minimum
Residential uses	R-2 standards apply		R-3 standards apply	See Table 2.4-5	R-3 standards apply	N/A	N/A	N/A
Other uses	N/A			See Table 2.4-5	N/A
Setbacks and Build-To Standards
Front
From streets (All Subareas) [3]	0 ft./ 20 ft. / 20 ft.	Must allow compliance with Section 146-4.7		See Table 2.4-5	Arterials and Collectors: 0 ft. min. 15 ft. max; Other: 5 ft. min, 15 ft. max.	Core: 10 ft. max. Edge: 18 ft. max.	Main Street: 15 ft. max for at least 50% of ground floor frontage; All streets other than the Main Street: 10 ft. min	25 ft. min. [4]
From Residential district (All Subareas)	20 ft.	Must allow compliance with Section 146-4.7		See Table 2.4-5		Core: 10 ft. max. Edge: 18 ft. max.		25 ft. min. [4]
Side setback, minimum
From streets (All Subareas)	0 ft./ 20 ft./ 20 ft.	Must allow compliance with Section 146-4.7		See Table 2.4-5	Must allow compliance with Section 146-4.7	Core: None Edge: same as any Residential zone district adjacent to the lot	Must allow compliance with Section 146-4.7	25 ft. [4]
From Residential districts (All Subareas)	20 ft.	Must allow compliance with Section 146-4.7		See Table 2.4-5	Must allow compliance with Section 146-4.7		Must allow compliance with Section 146-4.7	50 ft.
Rear setback, minimum
General (All Subareas)	0 ft./ 20 ft./ 20 ft.	Must allow compliance with Section 146-4.7		See Table 2.4-5	Must allow compliance with Section 146-4.7	Core: If no alley: 5 ft. If alley: 3 ft. max. Edge: same as any Residential zone district adjacent to the lot	Must allow compliance with Section 146-4.7	25 ft.
From Residential districts (All Subareas)	20 ft.	Must allow compliance with Section 146-4.7		See Table 2.4-5	Must allow compliance with Section 146-4.7		Must allow compliance with Section 146-4.7	50 ft.
Setback from centerline of alley, minimum.	N/A	10 ft.	Subarea A: 10 feet min., Subareas B & C: N/A	See Table 2.4-5	N/A		N/A	N/A
Separation of buildings, maximum	N/A	N/A	N/A	N/A	N/A	N/A	45 ft. on Main Street; 180 ft. along arterials and collectors	N/A
Building Standards
Building height
General	Subarea A: See Aurora Infill Handbook; Subareas B & C: 2 stories max.	75 ft. max.	75 ft. max.	See Table 2.4-5	19 ft. min. on arterials	Core: No max.; 3 story min. Edge: No max.; No min.	Max for Focal Point: N/A Max General: No building taller than Focal Point; If no Focal Point yet constructed: 100 ft.	Single-family and duplex: 38 ft. max.; Multifamily or mixed-use: 100 ft.; Non-residential: 100 ft.
Multifamily Affordable Housing structure	2 stories max.	75 ft. max	90 ft. max.	See Table 2.4-5	19 ft. min on arterials	Core or Edge: No max. 3 story min.	Max for Focal Point: N/A Max General: No building taller than Focal Point; If no Focal Point yet constructed: 130 ft.	100 ft.
Within 75 feet of R-1 or R-2 district [5]	38 ft. max.	38 ft. max.	38 ft. max.	See Table 2.4-5	38 ft. max.	48 ft. max.	38 ft. max.	38 ft. max.
Gross floor area, maximum
All structures	50,000 sf. gfa	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Each individual use [6]	15,000 sf. gfa	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Notes: [1] Applies to properties zoned into this district after the effective date. Ten-acre maximum does not apply to MU-N districts designated for school, park, or religious assembly uses. [2] Applies to projects in this district approved under prior E-470 or NEP zoning and projects in Subarea C zoned into this district after the effective date. [3] Entries and arcades can be recessed from maximum setbacks. [4] If the Director determines that the intended character of the development is urban, based on considerations of surrounding existing or intended development and relationship of primary buildings to the street, the Director can approve a reduction to 15 feet. [5] Applies to general structures and to affordable housing structures. [6] Except grocery stores, places of worship, schools, or recreation centers.

C. Special Purpose Districts. Dimensional standards for special purpose districts are shown in Table 4.2-4.

Table 4.2-4 Summary of Special Purpose Districts Dimensional Standards
See additional standards in Section 146-2.5 (Special Purpose Districts)
	AD	APZ	I-1	I-2	POS
Lot Standards
Lot coverage by buildings and structures, max.	N/A	See Section 146-2.5.2.D.2.b	N/A	N/A	N/A
Lot area and width, minimum	[1]	[1]	[1]	[1]	N/A
Setbacks, Minimum
Front setback, minimum					25 ft. for permanent structures; 10 ft. for parking areas.
General	25 ft.	20 ft.	20 ft.	25 ft.
From arterial street	25 ft.	25 ft.	25 ft.	50 ft.
From interstate or expressway	100 ft.	100 ft.	100 ft.	100 ft.
On frontage road adjacent to interstate or expressway	40 ft.	40 ft.	40 ft.	50 ft.
Side setback, minimum
General	General: 25 ft.; Abutting Residential district: 50 ft.	10 ft.	10 ft.	10 ft.
Abutting a public street	25 ft.	20 ft.	20 ft.	25 ft.
Rear setback, minimum
General	General: 25 ft. Abutting Residential district: 50 ft.	5 ft.	5 ft.	5 ft.
Abutting a public street	20 ft.	20 ft.	20 ft.	25 ft.
Building Standards
Building height, maximum
General	100 ft.	60 ft. or limits in FAA Part 77 surfaces for military airports, whichever is less	100 ft.	100 ft.	50 ft.
Within 200 feet of a Residential district	Same as Residential district
Notes: [1] Lot must be large enough to accommodate required setbacks, parking, loading, landscaping, screening, buffering, fire access, refuse/recycling, and other areas required by this UDO.

(Ord. No. 2023-41 § 1, 09-11-2023; Ord. No. 2020-37 § 13, 10-05-2020; Ord. No. 2019-49 § 1, 08-19-2019)