Rochester allows ADUs in residential zones with straightforward regulations. The city's affordable housing market and reasonable property costs make it attractive for ADU development and investment.
Zoning & Size Requirements
| Allowed Zones | Single-family residential |
| Max Size (Detached) | 850 sq ft |
| Max Size (Attached) | 750 sq ft |
| Max Size (JADU) | Not allowed |
| Max Height | 35 feet |
| Max Units | 1 ADU per lot |
Setback Requirements
| Rear Setback | 15 feet |
| Side Setback | 5 feet |
| Front Setback | 20 feet |
| Parking Required | 1 space per unit |
| Owner Occupancy | Not required |
| Min Lot Size | 4,500 sq ft |
Permit Process & Fees
| Approval Process | Building permit |
| Review Timeline | 50-70 days |
| Permit Fees | $1,900-$3,300 |
| Impact Fees | $400-$900 |
| Plan Check | 2-3 weeks |
| Pre-Approved Plans | Limited availability |
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Construction Costs
| Average Build Cost | $105,000-$210,000 |
| Cost per Sq Ft | $125-$250 |
| Garage Conversion | $50,000-$120,000 |
| Prefab ADU (Installed) | $75,000-$170,000 (installed) |
Finance Your ADU Project
Most ADU projects are funded through HELOCs, construction loans, or cash-out refinancing. Compare rates from top lenders in minutes.
Compare ADU Financing Options →Rental Income Potential
| Avg Rent (1 Bedroom) | $1,050-$1,450/mo |
| Avg Rent (2 Bedroom) | $1,350-$1,850/mo |
| Short-Term Rental | Not typically permitted |
| Est. Annual ROI | 8-12% annual return |
Explore Prefab ADU Options
Prefab ADUs can save 20-40% vs. traditional construction and cut build time in half. Compare top prefab manufacturers.
Compare Prefab ADUs →Recent Law Changes
What's Changed Recently
- 2024: Expanded ADU provisions in residential zones
- 2023: Streamlined permitting timeline
- 2024: Increased max detached ADU size from 750 to 850 sq ft
- 2023: Reduced impact fees
Tips for Building an ADU in Rochester
- Rochester's very affordable market creates exceptional ROI potential
- University of Rochester and medical institutions provide tenant stability
- Low property costs enable portfolio building strategies
- Strong long-term rental demand due to regional factors
Frequently Asked Questions
Can I build an ADU in Rochester?
Yes. ADUs are allowed in Single-family residential in Rochester. The maximum size for a detached ADU is 850 sq ft. No owner-occupancy is required.
How much does an ADU cost in Rochester?
ADU construction in Rochester typically costs $105,000-$210,000. Garage conversions run $50,000-$120,000, and prefab ADUs cost $75,000-$170,000 (installed).
How much can I rent an ADU for in Rochester?
Average ADU rents in Rochester are $1,050-$1,450/mo for a 1-bedroom and $1,350-$1,850/mo for a 2-bedroom unit.
Do I need parking for an ADU in Rochester?
1 space per unit. Check with Rochester planning department for the latest New York ADU parking rules, as many states have relaxed requirements in recent years.
How long does it take to get an ADU permit in Rochester?
The permit review timeline in Rochester is 50-70 days. Fees range from $1,900-$3,300.
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