ADU · Westchester County
Can you build an ADU in Port Chester, NY?
Village of Port Chester has 16 districts. 12 districts prohibit ADUs, 4 allow them with occupancy restrictions. Check your address to confirm the district that applies to your parcel:
What the Port Chester code indicates by district
The table below shows how each district treats ADUs, alongside the lot and setback standards that govern a second unit. District boundaries and conditions vary, so treat this as a starting point and confirm the district that applies to your parcel.
| District | Min lot | Setbacks F / S / R | Max height | ADU |
|---|---|---|---|---|
| Character District 3 | — | 10 / 10 / 6 ft | — | Occupancy restricted |
| Character District 3 R20 | 0.4591 ac | 40 / 15 / 40 ft | 35 ft | Occupancy restricted |
| Character District 3 R7 | 0.1722 ac | 30 / 5 / 30 ft | 35 ft | Occupancy restricted |
| Character District 3 R5 | 0.1148 ac | 25 / 8 / 30 ft | 35 ft | Occupancy restricted |
| Character District 4 | — | 3 / 7 / 3 ft | — | No |
| Character District 4 Mixed Use | — | 0 / 0 / 3 ft | — | No |
| Character District 5 | — | 0 / 0 / - ft | — | No |
| Character District 5 Waterfront | — | 0 / 12 / 25 ft | — | No |
| Character District 5 Transit | — | — | — | No |
| Character District 6 | — | 0 / 0 / - ft | — | No |
| Character District 6 Transit | — | 0 / 0 / - ft | — | No |
| Special District - Planned Residential Development | — | — | — | No |
| Special District - Planned Mixed Use | — | — | — | No |
| Civic District | — | — | — | No |
| C1 District | — | 3 / 7 / 3 ft | 35 ft | No |
| Two-Family Residential District | 0.1148 ac | 20 / 8 / 30 ft | 30 ft | No |
ADUs vs. short-term rentals in Port Chester
No local short-term-rental law on record - which is not the same as permission for Village of Port Chester. No local STR ordinance found as of Jun 2026; standard village zoning and building codes apply. Westchester County hotel occupancy tax (3%) applies to short-term stays. These are separate questions from whether you can build an ADU — a unit you're allowed to add isn't automatically one you're allowed to rent nightly, so check both.
Good to know
- Residential lot minimum0.1148 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 939-5203
- Last reviewed2026-08-26
ADU FAQ — Port Chester, NY
Are ADUs allowed in Port Chester, NY?
Village of Port Chester has 16 districts. 12 districts prohibit ADUs, 4 allow them with occupancy restrictions. Check your address with the free ADU checker, or confirm with the building department at (914) 939-5203.
Do I need a special permit for an ADU in Port Chester?
No district in Village of Port Chester requires a special-use permit for an ADU - 12 districts prohibit ADUs, 4 allow them with occupancy restrictions. Site-plan review or a building permit may still apply.
Can I use an ADU as a short-term rental in Port Chester?
No local short-term-rental law on record - which is not the same as permission for Village of Port Chester. ADU occupancy and short-term-rental rules are separate: an ADU you can build isn't automatically one you can rent nightly. Confirm both before you count on STR income.
What an ADU costs to build in Port Chester
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $235k–310k at a standard finish, and the per-square-foot rate comes in above a full house because the kitchen, bath, panel and heating plant cost the same either way. See the full cost to build an ADU in Port Chester, priced by size.
More on Port Chester: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Village of Port Chester is compiled from the municipal code (last reviewed 2026-08-26) and provided for decision-support only — not legal or architectural advice. ADU eligibility, size, owner-occupancy and permit conditions vary by district and often carry exceptions; verify with the building department at (914) 939-5203 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.