ADU · Westchester County
Can you build an ADU in Rye Brook, NY?
Village of Rye Brook has 18 districts. 10 districts allow ADUs with occupancy restrictions, 7 do not. 1 district has incomplete data - verify with the building department at (914) 939-0668. Check your address to confirm the district that applies to your parcel:
What the Rye Brook 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 | 0.5739 ac | — | — | Occupancy restricted |
| One-Family Residential | 0.2296 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.287 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.3444 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.3444 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.4591 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.1148 ac | — | 30 ft | Occupancy restricted |
| One-Family Residential | 0.1722 ac | — | 30 ft | Occupancy restricted |
| Two-Family Residential | 0.1148 ac | — | 30 ft | Occupancy restricted |
| Restricted Multi-Family | 10 ac | — | 30 ft | Occupancy restricted |
| Campus/Office Building | 15 ac | — | 50 ft | No |
| Office Building | 5 ac | — | 50 ft | No |
| Office Building | 5 ac | — | 30 ft | No |
| Office Building & Business District | 3 ac | — | 20 ft | No |
| Neighborhood Retail | 0.2984 ac | — | 30 ft | No |
| Planned Neighborhood Retail | 1 ac | — | 30 ft | No |
| Hotel | 12 ac | — | 40 ft | No |
| Planned Unit Development | 30 ac | — | — | — |
ADUs vs. short-term rentals in Rye Brook
No local short-term-rental law on record - which is not the same as permission for Village of Rye Brook. 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 minimum0.1148–10 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 939-0668
- Last reviewed2026-06-08
ADU FAQ — Rye Brook, NY
Are ADUs allowed in Rye Brook, NY?
Village of Rye Brook has 18 districts. 10 districts allow ADUs with occupancy restrictions, 7 do not. 1 district has incomplete data - verify with the building department at (914) 939-0668. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Rye Brook?
No district in Village of Rye Brook requires a special-use permit for an ADU - 10 districts allow ADUs with occupancy restrictions, 7 do not. Site-plan review or a building permit may still apply.
Can I use an ADU as a short-term rental in Rye Brook?
No local short-term-rental law on record - which is not the same as permission for Village of Rye Brook. 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 Rye Brook
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 Rye Brook, priced by size.
More on Rye Brook: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Village of Rye Brook 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) 939-0668 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.