ADU · Westchester County
Can you build an ADU in Elmsford, NY?
Village of Elmsford has 10 districts. 8 districts prohibit ADUs, 1 requires a special-use permit. 1 district has incomplete data - verify with the building department at (914) 592-6555. Check your address to confirm the district that applies to your parcel:
What the Elmsford 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 R-0 One Family | 0.5 ac | — | 36 ft | No |
| Residence R-1 One Family | 0.1148 ac | — | 36 ft | No |
| Residence R-2 Two Families | 0.2296 ac | — | 36 ft | No |
| Residence R-3 Three or More Families | 0.0574 ac | — | 35 ft | No |
| Residential Cluster Development | 4 ac | — | 40 ft | No |
| Business District | 0.3444 ac | — | 49 ft | Special permit |
| Central Business District | 0.9183 ac | — | 49 ft | No |
| Limited Office Use District | 0.2296 ac | — | 72 ft | No |
| Light Industrial District | — | — | 150 ft | No |
| Unzoned (Highway ROW Lands) | — | — | — | — |
ADUs vs. short-term rentals in Elmsford
No local short-term-rental law on record - which is not the same as permission for Village of Elmsford. 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 minimum0.0574–4 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 592-6555
- Last reviewed2026-06-08
ADU FAQ — Elmsford, NY
Are ADUs allowed in Elmsford, NY?
Village of Elmsford has 10 districts. 8 districts prohibit ADUs, 1 requires a special-use permit. 1 district has incomplete data - verify with the building department at (914) 592-6555. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Elmsford?
It depends on the district: 1 of 10 require a special-use permit, the rest do not. Check the district that applies to your parcel before you design.
Can I use an ADU as a short-term rental in Elmsford?
No local short-term-rental law on record - which is not the same as permission for Village of Elmsford. 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 Elmsford
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 Elmsford, priced by size.
More on Elmsford: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Village of Elmsford 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) 592-6555 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.