Zoning & Size Limits
| Requirement | Charlotte, NC | Raleigh, NC |
|---|
| Allowed Zones | Single-family residential zones | Single-family residential |
| Max Size (Detached) | 1,000 heated sq ft, and no more than 50% of the principal dwelling's floor area (whichever is less) when in an accessory structure | 800 sq ft |
| Max Size (Attached) | 800 sq ft | 800 sq ft gross floor area (UDO Sec. 3.6.2 caps all ADUs at 800 sq ft; must be smaller than the principal dwelling) |
| Max Height | No taller than the principal dwelling (the distric | 26 ft (overall height max per UDO Sec. 3.6.2) |
| Parking Required | No additional parking required beyond the principal dwelling | No additional parking required (UDO Sec. 3.6.2) |
| Owner Occupancy | Not required - Charlotte's UDO (2023) does not impose an own | Not required |
Setback Requirements
| Setback | Charlotte, NC | Raleigh, NC |
|---|
| Rear Setback | 15 feet | 5 feet (rear lot line, per UDO Sec. 3.6.2; 20 ft if abutting an alley with parking, 4 ft alley without parking) |
| Side Setback | 5 feet | 5 feet (side lot line); 10 ft side street |
| Front Setback | 20 feet | Must be located at or behind the front wall of the |
Permits & Timeline
| Detail | Charlotte, NC | Raleigh, NC |
|---|
| Permit Timeline | 50-75 days | 50-70 days |
| Permit Fees | $2,200-$3,800 | $2,100-$3,600 |
| Impact Fees | $800-$1,400 | $700-$1,300 |
| Pre-Approved Plans | Available for select types | Limited availability |
Construction Costs
| Cost | Charlotte, NC | Raleigh, NC |
|---|
| Avg Build Cost | $115,000-$230,000 | $110,000-$220,000 |
| Cost Per Sq Ft | $135-$270 | $135-$275 |
| Garage Conversion | $55,000-$130,000 | $55,000-$130,000 |
| Prefab ADU | $80,000-$180,000 | $80,000-$180,000 |
Rental Income Potential
| Rental | Charlotte, NC | Raleigh, NC |
|---|
| 1BR Avg Rent | $1,250-$1,700/mo | $1,200-$1,650/mo |
| 2BR Avg Rent | $1,600-$2,200/mo | $1,550-$2,150/mo |
| Short-Term Rentals | Varies by neighborhood | Not typically permitted |
| Est. ROI | 7-10% annual return | 7-10% annual return |
Which City Is Better for ADUs?
Charlotte scores 7/10 while Raleigh scores 7/10 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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