ADU · Westchester County
Can you build an ADU in Somers, NY?
Town of Somers has 15 districts. 8 districts prohibit ADUs, 6 allow them with occupancy restrictions. 1 district has incomplete data - verify with the building department at (914) 277-3539. Check your address to confirm the district that applies to your parcel:
What the Somers 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 |
|---|---|---|---|---|
| Residence R120 | 2.7548 ac | — | 30 ft | Occupancy restricted |
| Residence R80 | 1.8365 ac | — | 30 ft | Occupancy restricted |
| Residence R80 | 1.8365 ac | — | 30 ft | Occupancy restricted |
| Designed Residential Development | 500 ac | — | — | — |
| Residence R40 | 0.9183 ac | — | 30 ft | Occupancy restricted |
| Multi-Family Residence Hamlet | 10 ac | — | 30 ft | Occupancy restricted |
| Residence R10 | 0.2296 ac | — | 30 ft | Occupancy restricted |
| Corporate Research/Office | 150 ac | — | — | No |
| Office Business | 100 ac | — | 55 ft | No |
| Community Shopping | — | — | 30 ft | No |
| Neighborhood Shopping | 0.2296 ac | — | 30 ft | No |
| Office and Light Industry | 1.8365 ac | — | 30 ft | No |
| Business Historic Preservation | — | — | 35 ft | No |
| Planned Hamlet | — | — | 30 ft | No |
| Beach-Community House | — | — | — | No |
ADUs vs. short-term rentals in Somers
No local short-term-rental law on record - which is not the same as permission for Town of Somers. No local STR ordinance found as of Jun 2026; standard town 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 minimum0.2296–500 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 277-3539
- Last reviewed2026-06-08
ADU FAQ — Somers, NY
Are ADUs allowed in Somers, NY?
Town of Somers has 15 districts. 8 districts prohibit ADUs, 6 allow them with occupancy restrictions. 1 district has incomplete data - verify with the building department at (914) 277-3539. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Somers?
No district in Town of Somers requires a special-use permit for an ADU - 8 districts prohibit ADUs, 6 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 Somers?
No local short-term-rental law on record - which is not the same as permission for Town of Somers. 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 Somers
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 Somers, priced by size.
More on Somers: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Town of Somers is compiled from the municipal code (last reviewed 2026-06-08) 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) 277-3539 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.