Pittsburgh currently does NOT allow ADUs as of-right in most zones. Limited pilot ADU Overlay District in Garfield (2018, expired but permits valid). Proposed legislation would expand ADU allowances. Complex regulatory environment.
Zoning & Size Requirements [1]
| Allowed Zones | No city-wide permission; only Garfield ADU Overlay District (pilot, expired) |
| Max Size (Detached) | 1200 sq ft (proposed; not yet adopted) |
| Max Size (Attached) | Not permitted currently |
| Max Size (JADU) | N/A |
| Max Height | Subject to zoning code; typically 35 ft residential |
| Max Units | Proposed: up to 2 ADUs per zoning lot (not yet approved) |
Setback Requirements [1]
| Rear Setback | Varies by zone; typically 20-30 ft |
| Side Setback | Varies by zone; typically 10-15 ft |
| Front Setback | Varies by zone |
| Parking Required | Typically 1-2 spaces required |
| Owner Occupancy | Not mandated (but proposed in new legislation) |
| Min Lot Size | Varies by zone; no ADU-specific minimum |
Permit Process & Fees [2]
| Approval Process | Must comply with International Building Code (IBC) and local zoning; special consideration needed |
| Review Timeline | 90-180 days if approved; varies dramatically |
| Permit Fees | $1,350+ for building permits (variable by jurisdiction) |
| Impact Fees | Local impact fees vary; no ADU-specific waivers |
| Plan Check | 4-8 weeks |
| Pre-Approved Plans | Not available; custom designs required |
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Construction Costs
| Average Build Cost | $200,000-$325,000 |
| Cost per Sq Ft | $225-$375 |
| Garage Conversion | $90,000-$150,000 |
| Prefab ADU (Installed) | $80,000-$140,000 |
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Rental Income Potential
| Avg Rent (1 Bedroom) | $900-$1,300 |
| Avg Rent (2 Bedroom) | $1,100-$1,600 |
| Short-Term Rental | Limited market for short-term; long-term preferred |
| Est. Annual ROI | 12-18 year payback due to low rents; investor caution advised |
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Recent Law Changes
What's Changed Recently
- No ADUs permitted outside Garfield pilot (expired 2020)
- Proposed legislation to expand ADU allowances still pending
- City planning process underway for ADU policies
- Community resistance in some neighborhoods
Tips for Building an ADU in Pittsburgh
- Pittsburgh is NOT ADU-friendly currently; research before investing
- Proposed legislation may change landscape in 2026
- Garfield pilot ADU permits still valid (if you have one)
- Rental income lower than national averages ($93K over 5 years)
- Contact Zoning Division before committing to ADU project
Sources & References
All data on this page is sourced from official government records and verified market data. View our full methodology.
- Pittsburgh Planning Department — ADU Information Planning Department — Accessed 2026-03-15
- Pittsburgh Building Department — Permit Information building_dept — Accessed 2026-03-15
Frequently Asked Questions
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