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Aurora is actively updating its Unified Development Ordinance to comply with HB 24-1152, opening ADU construction to thousands of homeowners who were previously blocked. Here’s what’s changing.
| ADUs Allowed? | ✅ Yes — expanding under HB 24-1152 compliance updates |
| Maximum Size | 1,000 sq ft or 50% of primary home floor area, whichever is less |
| ADU Types Permitted | Detached, attached, basement, garage conversion; JADU in select zones |
| Owner-Occupancy Required? | No owner-occupancy requirement under HB 24-1152 for covered zones |
| Parking Requirement | 1 off-street parking space required per ADU unless within ½ mile of transit |
| HOA Override? | HOAs cannot prohibit ADUs in covered zones per HB 24-1152 |
| Short-Term Rental (STR)? | Aurora STR ordinance applies; verify current rules with Aurora Planning |
| Permit Path | Administrative approval for compliant ADUs in eligible zones |
| Estimated Permit Timeline | 8–16 weeks typical |
| Official Source | City of Aurora Planning |
⟳ Last reviewed: October 2026. ADU rules change. Always verify current code with Aurora before starting a project. View official source →
Aurora is Colorado’s third-largest city and is actively updating its Unified Development Ordinance to comply with HB 24-1152. Eligible zones now include R-R, R-1, R-2, R-3, R-4, OA-R1, OA-R2, MU-A, and APZ districts. Because Aurora spans three counties (Arapahoe, Adams, and Douglas), utility providers and some permit requirements vary by location — confirm which jurisdiction your specific address falls under before planning.
Not sure if your lot qualifies? The ADU quiz takes 3 minutes and gives you a personalized eligibility summary based on your property type, location, and goals. Take the free ADU quiz →
| Detached Backyard Cottage | $200,000–$380,000 |
| Garage Conversion | $55,000–$140,000 |
| Basement ADU Conversion | $40,000–$110,000 |
| Permit Fees (estimate) | $3,500–$10,000 |
| Utility Tap Fees (detached) | $6,000–$18,000 depending on utility district and connection type |
| Estimated Monthly Rent | $1,700–$2,800/month |
| Estimated Break-Even | 7–11 years for detached; 3–6 years for basement conversion |
Local note: Aurora spans three counties with different utility providers — verify your water/sewer district early, as tap fees and capacity vary significantly.
Cost ranges reflect 2026 Denver metro construction pricing. Individual project costs depend on site conditions, finishes, utility distances, and contractor selection. Get multiple bids before committing to a budget.
Official Sources
Rules and fees change. Always verify current requirements directly with your local jurisdiction and utility provider before starting a project.
Answer 7 questions to see your estimated cost range, likely ADU type, and local eligibility — free, no sign-up required.