ADU · Westchester County
Can you build an ADU in Ardsley, NY?
Village of Ardsley has 10 districts. 7 districts prohibit ADUs, 3 allow them with occupancy restrictions. Check your address to confirm the district that applies to your parcel:
What the Ardsley 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 |
|---|---|---|---|---|
| One-Family Residential | 0.9183 ac | — | 30 ft | Occupancy restricted |
| Conservation or Clustered Housing | 8 ac | — | 30 ft | No |
| Conservation or Clustered Housing | 8 ac | — | 30 ft | No |
| One-Family Residential | 0.2296 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.1722 ac | — | 30 ft | Occupancy restricted |
| Residence Office | — | — | — | No |
| Multi-Family Residential | — | — | — | No |
| General Business | 0.1148 ac | — | 45 ft | No |
| Special Business | 0.1148 ac | — | 45 ft | No |
| Shopping Center Business | — | — | — | No |
ADUs vs. short-term rentals in Ardsley
No local short-term-rental law on record - which is not the same as permission for Village of Ardsley. 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 minimum0.1722–8 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 693-1550
- Last reviewed2026-06-08
ADU FAQ — Ardsley, NY
Are ADUs allowed in Ardsley, NY?
Village of Ardsley has 10 districts. 7 districts prohibit ADUs, 3 allow them with occupancy restrictions. Check your address with the free ADU checker, or confirm with the building department at (914) 693-1550.
Do I need a special permit for an ADU in Ardsley?
No district in Village of Ardsley requires a special-use permit for an ADU - 7 districts prohibit ADUs, 3 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 Ardsley?
No local short-term-rental law on record - which is not the same as permission for Village of Ardsley. 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 Ardsley
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 Ardsley, priced by size.
More on Ardsley: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Village of Ardsley 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) 693-1550 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.