ADU · Westchester County
Can you build an ADU in New Rochelle, NY?
City of New Rochelle has 38 districts. 36 districts prohibit ADUs, 1 allows them with occupancy restrictions. 1 district has incomplete data - verify with the building department at (914) 654-2035. Check your address to confirm the district that applies to your parcel:
What the New Rochelle 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 | — | — | — | No |
| One Family Residence | — | — | — | No |
| One Family Residence | — | — | — | No |
| One Family Residence | — | — | — | No |
| One Family Residence | — | — | — | No |
| One Family Cluster Residence | — | — | — | No |
| One Family Historic Residence | — | — | — | No |
| One Family Waterfront Residential | — | — | — | No |
| Urban Renewal Townhouse Residence | 0.1607 ac | — | 35 ft | No |
| Two Family Residence | — | — | — | No |
| Multi - Family Residence | — | — | — | No |
| Multi - Family Residence | — | — | — | No |
| Multi - Family Residence | — | — | — | No |
| Multi - Family Residence | — | — | — | No |
| Multi - Family Residence | — | — | — | No |
| Multi - Family Residence | — | — | — | No |
| Planned Unit Development | — | — | — | No |
| Multi - Family Senior Citizen | 0.4591 ac | — | — | No |
| Multi - Family Residence | — | — | — | No |
| General Commercial Modified | — | — | 30 ft | No |
| Downtown Business | — | — | — | No |
| Downtown Mixed Use | — | — | — | No |
| Large Scale Retail | — | — | — | No |
| Mixed Use Family Entertainment | — | — | 250 ft | No |
| Neighborhood Business | — | — | 30 ft | No |
| Planned Waterfront Development | — | — | — | No |
| Industry | — | — | — | No |
| Light Industry | — | — | — | No |
| College Related Uses | — | — | — | No |
| Downtown Mixed Use Urban Renewal | — | — | — | No |
| Hospital | — | — | 180 ft | No |
| North Avenue | — | — | 40 ft | No |
| Planned Waterfront Development | — | — | — | No |
| Planned Unit Development | — | — | — | No |
| Planned Waterfront Development | — | — | — | No |
| Water Front Residence | — | — | — | No |
| Recreation Open Space | — | — | — | Occupancy restricted |
| Railroad | — | — | — | — |
ADUs vs. short-term rentals in New Rochelle
No local short-term-rental law on record - which is not the same as permission for City of New Rochelle. No city-specific STR ordinance found as of Jun 2026; standard housing and health codes apply, with Westchester County occupancy tax (3%) the primary compliance requirement for stays under 90 nights. 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 minimum0.1607–0.4591 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 654-2035
- Last reviewed2026-06-08
ADU FAQ — New Rochelle, NY
Are ADUs allowed in New Rochelle, NY?
City of New Rochelle has 38 districts. 36 districts prohibit ADUs, 1 allows them with occupancy restrictions. 1 district has incomplete data - verify with the building department at (914) 654-2035. Check your address with the free ADU checker.
Do I need a special permit for an ADU in New Rochelle?
No district in City of New Rochelle requires a special-use permit for an ADU - 36 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 New Rochelle?
No local short-term-rental law on record - which is not the same as permission for City of New Rochelle. 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 New Rochelle
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 New Rochelle, priced by size.
More on New Rochelle: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for City of New Rochelle 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) 654-2035 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.