ADU · Orange County
Can you build an ADU in Greenville, NY?
Town of Greenville has 3 districts. 2 districts allow ADUs, 1 does not. Check your address to confirm the district that applies to your parcel:
What the Greenville 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 | 2 ac | 40 / 60 / 50 ft | 35 ft | As of right |
| Commercial Mixed-Use | 2 ac | 40 / 40 / 50 ft | 35 ft | As of right |
| Conservation | 2 ac | 40 / 80 / 50 ft | 35 ft | No |
ADUs vs. short-term rentals in Greenville
No local short-term-rental law on record - which is not the same as permission for Town of Greenville. No local STR ordinance found as of Jun 2026. STRs appear permitted without specific local registration requirement. 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 minimum2 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCentral Hudson territory.
- Building dept(845) 856-6333
- Last reviewed2026-06-16
ADU FAQ — Greenville, NY
Are ADUs allowed in Greenville, NY?
Town of Greenville has 3 districts. 2 districts allow ADUs, 1 does not. Check your address with the free ADU checker, or confirm with the building department at (845) 856-6333.
Do I need a special permit for an ADU in Greenville?
No district in Town of Greenville requires a special-use permit for an ADU - 2 districts allow ADUs, 1 does not. Site-plan review or a building permit may still apply.
Can I use an ADU as a short-term rental in Greenville?
No local short-term-rental law on record - which is not the same as permission for Town of Greenville. 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 Greenville
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 Greenville, priced by size.
More on Greenville: Full zoning for new construction · ADU build cost · House build cost · All Orange County towns
ADU information for Town of Greenville is compiled from the municipal code (last reviewed 2026-06-16) 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) 856-6333 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.