ADU · Orange County
Can you build an ADU in Montgomery, NY?
Village of Montgomery has 11 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Montgomery 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 |
|---|---|---|---|---|
| Residential One-Family | 0.413 ac | 40 / 25 / 35 ft | 35 ft | No |
| Residential Agriculture One-Family | 0.275 ac | 35 / 15 / 35 ft | 35 ft | No |
| Residential One-Family | 0.184 ac | 30 / 10 / 30 ft | 35 ft | No |
| Residential One-Family | 0.23 ac | 30 / 10 / 20 ft | 35 ft | No |
| Residential One-Family | 0.115 ac | 25 / 10 / 25 ft | 35 ft | No |
| Residential One- and Two-Family | 0.115 ac | 25 / 10 / 25 ft | 35 ft | No |
| Multifamily Residential | 0.115 ac | 25 / 10 / 25 ft | 35 ft | No |
| Neighborhood Business | 0.23 ac | 50 / 20 / 30 ft | 35 ft | No |
| Village Business | — | 0 / 12 / 20 ft | 35 ft | No |
| Industrial Park | 0.918 ac | 50 / 30 / 50 ft | 35 ft | No |
| Village Industry | 0.115 ac | 0 / 12 / 20 ft | 35 ft | No |
ADUs vs. short-term rentals in Montgomery
Short-term rentals allowed with local rules for Village of Montgomery. Short-Term Rental Properties chapter (~LL 1-2018) requires an STR permit, annual inspection, a resident agent, and $1M liability insurance. 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 minimum0.115–0.413 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCentral Hudson territory.
- Building dept(845) 457-9621
- Last reviewed2026-07-12
ADU FAQ — Montgomery, NY
Are ADUs allowed in Montgomery, NY?
Village of Montgomery has 11 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 457-9621.
Do I need a special permit for an ADU in Montgomery?
No. No district in Village of Montgomery permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (845) 457-9621 before ruling it out.
Can I use an ADU as a short-term rental in Montgomery?
Short-term rentals allowed with local rules for Village of Montgomery. 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 Montgomery
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 Montgomery, priced by size.
More on Montgomery: Full zoning for new construction · ADU build cost · House build cost · All Orange County towns
ADU information for Village of Montgomery is compiled from the municipal code (last reviewed 2026-07-12) 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) 457-9621 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.