ADU · Orange County
Can you build an ADU in Wallkill, NY?
Town of Wallkill has 6 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Wallkill 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 Agricultural | 2 ac | 60 / 40 / 70 ft | 35 ft | No |
| Low-Density Agricultural | 3 ac | 60 / 40 / 70 ft | 35 ft | No |
| Suburban Residential | 1.5 ac | 35 / 20 / 30 ft | 35 ft | No |
| Medium-Density Residential | 0.43 ac | 35 / 20 / 30 ft | 35 ft | No |
| Multiple-Family (Bonus) Residential | 5 ac | 40 / 30 / 30 ft | 35 ft | No |
| Airport Residential | 0.14 ac | 25 / 5 / 30 ft | 35 ft | No |
ADUs vs. short-term rentals in Wallkill
Short-term rentals allowed with local rules for Town of Wallkill. Short-term rentals require permit from Building Department. No separate local law found; permit process administered by BD. 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 minimum0.43–5 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCentral Hudson territory.
- Building dept(845) 692-7830
- Last reviewed2026-07-08
ADU FAQ — Wallkill, NY
Are ADUs allowed in Wallkill, NY?
Town of Wallkill has 6 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 692-7830.
Do I need a special permit for an ADU in Wallkill?
No. No district in Town of Wallkill permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (845) 692-7830 before ruling it out.
Can I use an ADU as a short-term rental in Wallkill?
Short-term rentals allowed with local rules for Town of Wallkill. 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 Wallkill
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $205k–270k 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 Wallkill, priced by size.
More on Wallkill: Full zoning for new construction · ADU build cost · House build cost · All Orange County towns
ADU information for Town of Wallkill is compiled from the municipal code (last reviewed 2026-07-08) 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 (845) 692-7830 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.