Zoning & Size Limits
| Requirement | Buffalo, NY | Rochester, NY |
|---|
| Allowed Zones | Single-family residential zones | Single-family residential |
| Max Size (Detached) | 900 sq ft | 850 sq ft |
| Max Size (Attached) | 800 sq ft | 750 sq ft |
| Max Height | 30 feet | 35 feet |
| Parking Required | 1 space per unit | 1 space per unit |
| Owner Occupancy | Not required | Not required |
Setback Requirements
| Setback | Buffalo, NY | Rochester, NY |
|---|
| Rear Setback | 15 feet | 15 feet |
| Side Setback | 5 feet | 5 feet |
| Front Setback | 20 feet | 20 feet |
Permits & Timeline
| Detail | Buffalo, NY | Rochester, NY |
|---|
| Permit Timeline | 50-70 days | 50-70 days |
| Permit Fees | $2,000-$3,500 | $1,900-$3,300 |
| Impact Fees | $500-$1,000 | $400-$900 |
| Pre-Approved Plans | Available for select types | Limited availability |
Construction Costs
| Cost | Buffalo, NY | Rochester, NY |
|---|
| Avg Build Cost | $110,000-$220,000 | $105,000-$210,000 |
| Cost Per Sq Ft | $120-$250 | $125-$250 |
| Garage Conversion | $55,000-$130,000 | $50,000-$120,000 |
| Prefab ADU | $80,000-$180,000 | $75,000-$170,000 |
Rental Income Potential
| Rental | Buffalo, NY | Rochester, NY |
|---|
| 1BR Avg Rent | $1,100-$1,500/mo | $1,050-$1,450/mo |
| 2BR Avg Rent | $1,400-$1,900/mo | $1,350-$1,850/mo |
| Short-Term Rentals | Limited | Not typically permitted |
| Est. ROI | 8-12% annual return | 8-12% annual return |
Which City Is Better for ADUs?
Buffalo scores 6/10 while Rochester scores 6/10 on our ADU-friendliness index.
Both cities offer viable ADU development opportunities — the best choice depends on your specific property, budget, and goals.
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