ADU · Rockland County
Can you build an ADU in Suffern, NY?
Village of Suffern has 15 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Suffern 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 Residence | 0.34 ac | 35 / 20 / 40 ft | 35 ft | No |
| One-Family Residence | 0.23 ac | 30 / 15 / 30 ft | 35 ft | No |
| One-Family Residence | 0.17 ac | 25 / 12 / 25 ft | 35 ft | No |
| One-Family Residence | 0.11 ac | 20 / 10 / 20 ft | 35 ft | No |
| One- and Two-Family Residence (1-family shown; semiattached 4,000 sf/unit, two-family 8,000 sf/unit) | 0.11 ac | 20 / 10 / 20 ft | 35 ft | No |
| One- and Two-Family Residence, Professional (1-family shown; semiattached 4,000 sf/unit, two-family 8,000 sf/unit) | 0.11 ac | 20 / 10 / 20 ft | 35 ft | No |
| Multiple Residence (1-family/professional office shown; low-rise multiple dwellings 40,000 sf plus Schedule A per-apartment area) | 0.11 ac | 20 / 10 / 20 ft | 35 ft | No |
| Multiple Residence High-Rise (40,000 sf plus Schedule B per-apartment area) | 0.92 ac | 25 / 25 / 50 ft | 70 ft | No |
| Transit Development District (multiple dwellings high-rise; the table prescribes no yard minimums) | 0.92 ac | — | 75 ft | No |
| Professional Office | 0.92 ac | 35 / 25 / 30 ft | 30 ft | No |
| Professional Office (primary row; one-family dwellings also permitted at 5,000 sf) | 0.34 ac | 35 / 20 / 40 ft | 35 ft | No |
| Central Business (no minimum lot area; no side yard required) | — | 15 / - / 20 ft | 45 ft | No |
| General Business (no minimum lot area; no side yard required for the primary use group) | — | 15 / - / 20 ft | 50 ft | No |
| Planned Light Industrial | 0.92 ac | 35 / 40 / 40 ft | 40 ft | No |
| Manufacturing (no minimum lot area; side and rear yards double to 50 ft when abutting an R District) | — | 30 / 25 / 25 ft | 35 ft | No |
ADUs vs. short-term rentals in Suffern
No local short-term-rental law on record - which is not the same as permission for Village of Suffern. No local short-term-rental law found as of 2026-08-26, and the Village's general rental regime DOES reach a rental of any length. Chapter 215, § 215-8, as amended 9-5-2023 by L.L. No. 8-2023, provides that no rental property may be occupied by anyone, including any tenants, without a valid rental permit, and the Village Clerk may refer the application to the Building Department for inspection before issuing it. There is no duration test in that sentence, so a short stay is not obviously outside it. A Rockland County Business Journal survey describing Suffern as allowing short-term rentals was the only basis for the previous 'permitted' reading; it is not the code, and it is not consistent with § 215-8. Treat a permit as required until the Village says otherwise. New York State's 2025 short-term rental registry (Ch. 99 of the Laws of 2025) separately requires every host statewide to register the unit regardless of local law. Confirm with Village of Suffern at (845) 357-2600 before listing. 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 minimum0.11–0.92 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityOrange & Rockland territory.
- Building dept(845) 357-2603
- Last reviewed2026-07-21
ADU FAQ — Suffern, NY
Are ADUs allowed in Suffern, NY?
Village of Suffern has 15 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 357-2603.
Do I need a special permit for an ADU in Suffern?
No. No district in Village of Suffern permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (845) 357-2603 before ruling it out.
Can I use an ADU as a short-term rental in Suffern?
No local short-term-rental law on record - which is not the same as permission for Village of Suffern. 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 Suffern
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $225k–295k 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 Suffern, priced by size.
More on Suffern: Full zoning for new construction · ADU build cost · House build cost · All Rockland County towns
ADU information for Village of Suffern is compiled from the municipal code (last reviewed 2026-07-21) 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) 357-2603 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.