ADU · Sullivan County
Can you build an ADU in Monticello, NY?
Village of Monticello has 5 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Monticello 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 |
|---|---|---|---|---|
| One-Family Residential | 0.23 ac | 30 / 10 / 30 ft | 30 ft | No |
| One- & Two-Family Residential | 0.17 ac | 30 / 10 / 25 ft | 30 ft | No |
| Multi-Family Residential | 0.17 ac | 30 / 10 / 25 ft | 30 ft | No |
| General Business | 0.23 ac | 30 / 10 / 20 ft | 35 ft | No |
| Core Business | 0.06 ac | 0 / 0 / 20 ft | 35 ft | No |
ADUs vs. short-term rentals in Monticello
No local short-term-rental law on record - which is not the same as permission for Village of Monticello. No specific STR local law found as of Jun 2026. As of August 2024, Village officials described STRs as unregulated with no registry in place; Local Law #7 (2024) amended the rental permit chapter but STR-specific enforcement was not active. 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 minimum0.17–0.23 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNYSEG territory.
- Building dept(845) 794-2429
- Last reviewed2026-08-16
ADU FAQ — Monticello, NY
Are ADUs allowed in Monticello, NY?
Village of Monticello has 5 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 794-2429.
Do I need a special permit for an ADU in Monticello?
No. No district in Village of Monticello permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (845) 794-2429 before ruling it out.
Can I use an ADU as a short-term rental in Monticello?
No local short-term-rental law on record - which is not the same as permission for Village of Monticello. 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 Monticello
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $190k–250k 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 Monticello, priced by size.
More on Monticello: Full zoning for new construction · ADU build cost · House build cost · All Sullivan County towns
ADU information for Village of Monticello is compiled from the municipal code (last reviewed 2026-08-16) 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) 794-2429 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.