ADU · Westchester County
Can you build an ADU in Sleepy Hollow, NY?
Village of Sleepy Hollow has 17 districts. 14 districts prohibit ADUs, 1 allows them with occupancy restrictions. 2 districts have incomplete data - verify with the building department at (914) 366-5116. Check your address to confirm the district that applies to your parcel:
What the Sleepy Hollow 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 Residence, Open | 1 ac | — | 35 ft | Occupancy restricted |
| One Family Residence, Low Density | 0.2296 ac | — | 35 ft | No |
| One Family Residence, Low Density | 0.3444 ac | — | 35 ft | No |
| One-Family Residence, Medium D | 0.1148 ac | — | 35 ft | No |
| Residence/Commercial, 1-2 Family | — | — | — | No |
| Residence, One and Two Family | 0.0918 ac | — | 35 ft | No |
| Multiple Residence, Medium Density | 0.0918 ac | — | 45 ft | No |
| Multiple Residence, High Density | 0.2296 ac | — | 100 ft | No |
| Highway Commercial | — | — | 35 ft | No |
| Central Commercial | — | — | 45 ft | No |
| Cemetery Area | 3 ac | — | 35 ft | No |
| Hospital | 10 ac | — | 100 ft | No |
| Public Parking Area | — | — | 25 ft | No |
| Riverfront Development | — | — | — | No |
| Parks | 1 ac | — | 35 ft | No |
| Hudson River | — | — | — | — |
| Railroad Corridor Unzoned | — | — | — | — |
ADUs vs. short-term rentals in Sleepy Hollow
No local short-term-rental law on record - which is not the same as permission for Village of Sleepy Hollow. No local STR ordinance found as of Jun 2026; the village has historically taken a hands-off enforcement approach to Airbnb. Standard village codes and the state primary-residency rule for multi-unit buildings apply. 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 minimum0.0918–1 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 366-5116
- Last reviewed2026-06-08
ADU FAQ — Sleepy Hollow, NY
Are ADUs allowed in Sleepy Hollow, NY?
Village of Sleepy Hollow has 17 districts. 14 districts prohibit ADUs, 1 allows them with occupancy restrictions. 2 districts have incomplete data - verify with the building department at (914) 366-5116. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Sleepy Hollow?
No district in Village of Sleepy Hollow requires a special-use permit for an ADU - 14 districts prohibit ADUs, 1 allows 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 Sleepy Hollow?
No local short-term-rental law on record - which is not the same as permission for Village of Sleepy Hollow. 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 Sleepy Hollow
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 Sleepy Hollow, priced by size.
More on Sleepy Hollow: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Village of Sleepy Hollow 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) 366-5116 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.