ADU Rules in Aurora, Colorado
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ADU Rules in Aurora, Colorado
Aurora is the third-largest city in Colorado and part of the Denver-Aurora metropolitan area. The city permits ADUs in residential zones under its Unified Development Code.
Permitted ADU Types
- Detached ADU: Standalone structure on the lot
- Attached ADU: Addition with own entrance and kitchen
- Garage Conversion: Converting existing garage
Size Limits
| ADU Type | Maximum Size |
|---|---|
| Detached ADU | 1,000 sq ft or 50% of primary dwelling |
| Attached ADU | 50% of primary dwelling floor area |
| Garage Conversion | Existing footprint |
Setbacks
- Front: Base zone standard
- Side: 5 feet minimum
- Rear: 5 feet minimum
Height
- Detached ADU: Maximum 20–24 feet
- Cannot exceed primary dwelling height
Parking
One additional off-street parking space required per ADU.
Permit Process
- Verify zoning: Contact Aurora Planning Division
- Submit plans: Architectural and site plans
- Plan review: Zoning and building compliance
- Building permit: Issued after approval
- Inspections and CO: Required before occupancy
Contact
Aurora Planning Division 15151 E. Alameda Pkwy, Aurora, CO 80012 Phone: (303) 739-7250 Website: auroragov.org/planning
Disclaimer: Verify current requirements with the Aurora Planning Division before starting any project.
More about Aurora Zoning
Sources
- Aurora Unified Development Code·library.municode.com·Accessed 2026-04-07·Direct link
- City of Aurora Planning Division·auroragov.org·Accessed 2026-04-07·Direct link
FAQ
Are ADUs allowed in Aurora, Colorado?
Yes. Aurora permits accessory dwelling units in residential zones. Aurora is the third-largest city in Colorado and part of the Denver metro area.
What is the maximum ADU size in Aurora?
Detached ADUs in Aurora are generally limited to 1,000 square feet or 50% of the primary dwelling's floor area.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Always verify current requirements with your local planning department.