ADU · Sullivan County
Can you build an ADU in Fallsburg, NY?
Town of Fallsburg has 7 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Fallsburg 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 |
|---|---|---|---|---|
| Agricultural District | 10 ac | 50 / 50 / 50 ft | 35 ft | No |
| Recreation District | 3 ac | 75 / 40 / 50 ft | 35 ft | No |
| Residential District | 0.5 ac | 35 / 20 / 25 ft | 35 ft | No |
| Hamlet Residential District | 0.29 ac | 35 / 10 / 25 ft | 35 ft | No |
| Business District | — | 35 / 15 / 25 ft | 35 ft | No |
| Mixed Use District | — | 35 / 15 / 25 ft | 35 ft | No |
| Planned Residential Development District | 0.75 ac | 25 / 25 / 25 ft | 35 ft | No |
ADUs vs. short-term rentals in Fallsburg
Short-term rentals allowed with local rules for Town of Fallsburg. Town of Fallsburg adopted Local Law No. 11-2020 (Chapter 225) on July 27, 2020, requiring an annual permit and safety inspection from Code Enforcement for any transient rental under 30 days. Violations carry fines up to $250/day. 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 minimum0.29–10 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNYSEG territory.
- Building dept(845) 434-8811
- Last reviewed2026-08-16
ADU FAQ — Fallsburg, NY
Are ADUs allowed in Fallsburg, NY?
Town of Fallsburg has 7 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 434-8811.
Do I need a special permit for an ADU in Fallsburg?
No. No district in Town of Fallsburg permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (845) 434-8811 before ruling it out.
Can I use an ADU as a short-term rental in Fallsburg?
Short-term rentals allowed with local rules for Town of Fallsburg. 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 Fallsburg
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 Fallsburg, priced by size.
More on Fallsburg: Full zoning for new construction · ADU build cost · House build cost · All Sullivan County towns
ADU information for Town of Fallsburg 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) 434-8811 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.