ADU · Rensselaer County
Can you build an ADU in Brunswick, NY?
Town of Brunswick has 11 districts. 7 districts allow ADUs with a special-use permit, 4 do not. Check your address to confirm the district that applies to your parcel:
What the Brunswick 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 | 0.918 ac | 50 / 25 / 50 ft | 32 ft | Special permit |
| Residential 40,000 District | 0.918 ac | 50 / 25 / 50 ft | 32 ft | Special permit |
| Residential 25,000 District | 0.574 ac | 40 / 15 / 40 ft | 30 ft | Special permit |
| Residential 15,000 District | 0.344 ac | 35 / 15 / 35 ft | 28 ft | Special permit |
| Residential 9,000 District | 0.207 ac | 30 / 10 / 30 ft | 28 ft | Special permit |
| Commercial District | 0.344 ac | 30 / 10 / 30 ft | 30 ft | No |
| Business Light District | 0.344 ac | 30 / 10 / 30 ft | 30 ft | No |
| Business Light Overlay District | 0.918 ac | 75 / 25 / 50 ft | 32 ft | Special permit |
| Hamlet District | 0.23 ac | 25 / 10 / 15 ft | 30 ft | Special permit |
| Industrial Light District | 1.837 ac | 100 / 50 / 50 ft | 50 ft | No |
| Industrial Heavy District | 1.837 ac | 100 / 50 / 50 ft | 50 ft | No |
ADUs vs. short-term rentals in Brunswick
No local short-term-rental law on record - which is not the same as permission for Town of Brunswick. No local short-term-rental law found as of 2026-08-26, with a stated limit on the reading. Zoning Chapter 160 regulates a BED AND BREAKFAST at § 160-33: it must be conducted within a single-family dwelling, must be the operator's PRINCIPAL RESIDENCE with at least one bedroom reserved for the owner's exclusive personal use, and requires a SPECIAL USE PERMIT — an owner-present regime that an investor-owned whole-house rental cannot satisfy. No short-term-rental, transient-rental or rental-registration provision appears. THE LIMIT: the only full text the Town publishes online is a WORKING DRAFT of the zoning law dated 4-19-2022, not the adopted code, so the negative rests on that draft plus the Town's document index. Confirm the adopted text with the Building Department before relying on it. 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 Town of Brunswick at (518) 279-3461 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 minimum0.207–0.918 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNational Grid territory.
- Building dept(518) 279-3461
- Last reviewed2026-08-05
ADU FAQ — Brunswick, NY
Are ADUs allowed in Brunswick, NY?
Town of Brunswick has 11 districts. 7 districts allow ADUs with a special-use permit, 4 do not. Check your address with the free ADU checker, or confirm with the building department at (518) 279-3461.
Do I need a special permit for an ADU in Brunswick?
It depends on the district: 7 of 11 require a special-use permit, the rest do not. Check the district that applies to your parcel before you design.
Can I use an ADU as a short-term rental in Brunswick?
No local short-term-rental law on record - which is not the same as permission for Town of Brunswick. 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 Brunswick
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $195k–255k 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 Brunswick, priced by size.
More on Brunswick: Full zoning for new construction · ADU build cost · House build cost · All Rensselaer County towns
ADU information for Town of Brunswick is compiled from the municipal code (last reviewed 2026-08-05) 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 (518) 279-3461 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.