ADU · Albany County
Can you build an ADU in Green Island, NY?
Village of Green Island has 6 districts. 5 of 6 districts prohibit ADUs. 1 district has incomplete data - verify with the building department at (518) 629-0368. Check your address to confirm the district that applies to your parcel:
What the Green Island 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 |
|---|---|---|---|---|
| Commercial | 0.0689 ac | 13 / 3 / 15 ft | 35 ft | No |
| Industrial | 0.4591 ac | 40 / 50 / 50 ft | 35 ft | No |
| Planned Development | — | — | — | — |
| Residential 1 | 0.0689 ac | 13 / 3 / 15 ft | 35 ft | No |
| Residential 2 | 0.0689 ac | 13 / 3 / 15 ft | 35 ft | No |
| Recreational | — | — | — | No |
ADUs vs. short-term rentals in Green Island
No local short-term-rental law on record - which is not the same as permission for Village of Green Island. No local short-term-rental law found as of 2026-08-26. The Village does run a residential occupancy regime — Chapter 156 requires annual inspection and registration of rental dwellings, and § 156-8 covers transient-occupancy dwellings — but § 156-8 reaches only buildings falling within the State's 'Group R1: Multiple Dwelling - Transient Occupancy' class, which it lists as motels, rooming or lodging houses, dormitories and fraternities. A single-family whole-house rental is not that class, so Chapter 156 does not authorise or forbid one. Landlord registration under § 156-10 applies to rentals generally. Absence of a found STR law is not permission. 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 Green Island at (518) 629-0368 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 minimum0.0689 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityGreen Island Power Authority territory.
- Building dept(518) 629-0368
- Last reviewed2026-07-08
ADU FAQ — Green Island, NY
Are ADUs allowed in Green Island, NY?
Village of Green Island has 6 districts. 5 of 6 districts prohibit ADUs. 1 district has incomplete data - verify with the building department at (518) 629-0368. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Green Island?
5 of 6 districts prohibit ADUs, so no permit applies in those. 1 district has incomplete data - verify with the building department at (518) 629-0368.
Can I use an ADU as a short-term rental in Green Island?
No local short-term-rental law on record - which is not the same as permission for Village of Green Island. 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 Green Island
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $195k–260k 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 Green Island, priced by size.
More on Green Island: Full zoning for new construction · ADU build cost · House build cost · All Albany County towns
ADU information for Village of Green Island is compiled from the municipal code (last reviewed 2026-07-08) 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) 629-0368 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.