ADU · Westchester County
Can you build an ADU in North Salem, NY?
Town of North Salem has 12 districts. 11 of 12 districts allow ADUs with occupancy restrictions. 1 district has incomplete data - verify with the building department at (914) 669-5952. Check your address to confirm the district that applies to your parcel:
What the North Salem 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 |
|---|---|---|---|---|
| Low Density Residential | 2 ac | — | 35 ft | Occupancy restricted |
| Rural Density Residential | 4 ac | — | 35 ft | Occupancy restricted |
| Medium Density Residential | 1 ac | — | 35 ft | Occupancy restricted |
| Medium Density Residential | 0.5 ac | — | 35 ft | Occupancy restricted |
| Planned Continuing Care Retirement Community | — | — | — | — |
| Medium-High Density Residential | 0.25 ac | — | 35 ft | Occupancy restricted |
| Residential-Multi-Family/Medium Density | 5 ac | — | 35 ft | Occupancy restricted |
| Residential-Multi-Family/High-Density | 10 ac | — | 35 ft | Occupancy restricted |
| Research-Office | 3.6731 ac | — | 35 ft | Occupancy restricted |
| General Business | 0.9183 ac | — | 35 ft | Occupancy restricted |
| Neighborhood Business | 0.2296 ac | — | 35 ft | Occupancy restricted |
| Professional Office | 0.4591 ac | — | 35 ft | Occupancy restricted |
ADUs vs. short-term rentals in North Salem
Short-term rentals allowed with local rules for Town of North Salem. Local Law #01-2026, adopted Jan 27, 2026, amended the zoning code to conditionally permit STRs with Planning Board approval; rentals limited to 90 days/year and 13 weekends; no grandfathering of existing STRs. 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 minimum0.25–10 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 669-5952
- Last reviewed2026-06-08
ADU FAQ — North Salem, NY
Are ADUs allowed in North Salem, NY?
Town of North Salem has 12 districts. 11 of 12 districts allow ADUs with occupancy restrictions. 1 district has incomplete data - verify with the building department at (914) 669-5952. Check your address with the free ADU checker.
Do I need a special permit for an ADU in North Salem?
No district in Town of North Salem requires a special-use permit for an ADU - 11 districts allow ADUs with occupancy restrictions. Site-plan review or a building permit may still apply.
Can I use an ADU as a short-term rental in North Salem?
Short-term rentals allowed with local rules for Town of North Salem. 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 North Salem
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 North Salem, priced by size.
More on North Salem: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Town of North Salem 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) 669-5952 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.