ADU · Rockland County
Can you build an ADU in Airmont, NY?
Village of Airmont has 11 districts. 6 districts prohibit ADUs, 5 allow them with occupancy restrictions. Check your address to confirm the district that applies to your parcel:
What the Airmont 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 |
|---|---|---|---|---|
| Rural Residential (one-family detached; FAR 0.20) | 1.15 ac | 50 / 30 / 50 ft | 35 ft | Occupancy restricted |
| Residential (one-family detached; FAR 0.20) | 0.92 ac | 50 / 25 / 50 ft | 35 ft | Occupancy restricted |
| Residential (one-family detached; FAR 0.20) | 0.8 ac | 50 / 25 / 50 ft | 35 ft | Occupancy restricted |
| Residential (one-family detached; FAR 0.25) | 0.57 ac | 35 / 20 / 35 ft | 35 ft | Occupancy restricted |
| Residential (one-family detached; FAR 0.25) | 0.34 ac | 35 / 15 / 35 ft | 35 ft | Occupancy restricted |
| Specialized Housing Residential (senior citizen housing development; height set by § 210-102H rather than a fixed figure) | 4 ac | 50 / 50 / 50 ft | — | No |
| Neighborhood Shopping (local convenience commercial tier; Airmont sets bulk PER USE — see Table 7) | 0.46 ac | 30 / 10 / 25 ft | 30 ft | No |
| Village Center (base commercial tier, no side yard required; Airmont sets bulk PER USE — see Table 8) | 0.46 ac | 30 / 0 / 25 ft | 30 ft | No |
| Professional Office (base tier, no side yard required; Airmont sets bulk PER USE — see Table 9) | 0.46 ac | 30 / 0 / 25 ft | 30 ft | No |
| Laboratory-Office (office buildings; Airmont sets bulk PER USE — see Table 10) | 1.38 ac | 75 / 50 / 50 ft | 45 ft | No |
| Planned Industry (smallest by-right tier; Airmont sets bulk PER USE — larger uses require 60,000 sf to 10 acres, see Table 11) | 0.92 ac | 75 / 50 / 50 ft | 45 ft | No |
ADUs vs. short-term rentals in Airmont
Short-term-rental status not confirmed for Village of Airmont. Short-term rental status not confirmed for the Village of Airmont — Chapter 210 does not address transient rental, and no separate local STR law was found in a 2026-07-21 search of village and county sources. Absence of a found law is NOT permission: call the Building Department at (845) 414-5536 to confirm before listing a property. Separately, since 2025 New York State requires every short-term-rental host to register the unit with the State through the county registry, regardless of what the municipality allows. 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 minimum0.34–4 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityOrange & Rockland territory.
- Building dept(845) 414-5536
- Last reviewed2026-07-21
ADU FAQ — Airmont, NY
Are ADUs allowed in Airmont, NY?
Village of Airmont has 11 districts. 6 districts prohibit ADUs, 5 allow them with occupancy restrictions. Check your address with the free ADU checker, or confirm with the building department at (845) 414-5536.
Do I need a special permit for an ADU in Airmont?
No district in Village of Airmont requires a special-use permit for an ADU - 6 districts prohibit ADUs, 5 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 Airmont?
Short-term-rental status not confirmed for Village of Airmont. 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 Airmont
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $225k–295k 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 Airmont, priced by size.
More on Airmont: Full zoning for new construction · ADU build cost · House build cost · All Rockland County towns
ADU information for Village of Airmont is compiled from the municipal code (last reviewed 2026-07-21) 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 (845) 414-5536 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.