ADU · Albany County
Can you build an ADU in Coeymans, NY?
Town of Coeymans has 14 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Coeymans code says
Coeymans has no accessory apartment use. A second household means a two-family house, a principal use by right in R-2, R-3, R-4P, R-A and R-A1 and by special permit in R-1.
Conditions the code attaches:
- Where public water and sewer are not available, an R-1 parcel is governed as R-A.
- R-3 also permits row houses, apartment houses and garden-type apartments.
- The custodial housing listed in the industrial, commercial and community facility districts is for a facility custodian, not a second unit for a house.
- The building department can be reached at (518) 756-2850.
What the Coeymans 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 |
|---|---|---|---|---|
| General Business | 0.57 ac | 15 / 15 / 15 ft | 60 ft | No |
| Planned Commercial | 0.57 ac | 15 / 15 / 15 ft | — | No |
| Community Facility - 1 | — | 25 / 25 / 25 ft | — | No |
| Community Facility - 2 | — | — | — | No |
| Industrial - 1 | 0.92 ac | 50 / 50 / 50 ft | — | No |
| Industrial - 2 | 0.92 ac | 50 / 50 / 50 ft | — | No |
| Planned Industrial | 0.92 ac | 50 / 50 / 50 ft | — | No |
| Industrial Buffer | — | — | — | No |
| Single-Family Residence | 0.34 ac | 25 / 15 / 40 ft | 35 ft | No |
| Single & Two Family Residence | 0.23 ac | 25 / 10 / 15 ft | 30 ft | No |
| Multifamily Residence | — | 15 / 15 / 20 ft | 40 ft | No |
| Planned Residential | 0.34 ac | 25 / 15 / 15 ft | 30 ft | No |
| Residential & Agricultural | 1.84 ac | 40 / 30 / 50 ft | 40 ft | No |
| Residential Agricultural Limited | — | — | — | No |
General Business - Hotels and apartment houses are principal permitted uses in B-1. The schedule publishes no lot coverage percentage here, for principal or accessory buildings.
Planned Commercial - Every use in C-1P requires site plan review. The schedule publishes no lot coverage percentage here, for principal or accessory buildings.
- The schedule publishes the minimum lot area as 25,000 sq ft.
Community Facility - 1 - The schedule sets only setbacks in CF-1, 25 ft to the front, rear and side, and publishes nothing for lot area, lot width, coverage or height.
Community Facility - 2 - The schedule publishes no dimensional figure of any kind for CF-2. It lists only the district's uses, sewage treatment facilities and resident custodial housing.
Industrial - 1 - The schedule publishes no maximum height for I-1. I-1, I-2 and I-3P share one dimensional row and differ only in permitted use, not in bulk.
- Coverage for accessory buildings is marked Total rather than a percentage.
Industrial - 2 - The schedule publishes no maximum height for I-2. I-1, I-2 and I-3P share one dimensional row and differ only in permitted use, not in bulk.
- Coverage for accessory buildings is marked Total rather than a percentage.
Planned Industrial - The schedule publishes no maximum height for I-3P. I-1, I-2 and I-3P share one dimensional row and differ only in permitted use, not in bulk.
- Every use in I-3P requires site plan review.
- Coverage for accessory buildings is marked Total rather than a percentage.
Industrial Buffer - The schedule publishes no figures for I-B. Its entry points to the supplementary regulations instead.
Single-Family Residence - Where neither water nor sewer is available the parcel is governed by the Residential and Agricultural standards instead, and the lot minimum goes from 15,000 sq ft to 80,000.
- Without water and sewer the lot needs 1.8365 acres, the front yard 40 ft, the side yards 30 ft each and 60 ft combined, and the rear yard 50 ft.
- In that same case building coverage is halved, from 30% of the lot to 15%, while the height ceiling rises to 40 ft and three storeys.
- The side yard is a pair: 15 ft on one side and 30 ft for the two combined.
- Minimum first-floor living area is 900 sq ft for a one-storey house and 750 sq ft for two to 2 1/2 storeys.
- Accessory buildings are capped separately, by a share of the lot and by minimum distances to the house and to the side and rear lot lines.
Single & Two Family Residence - The 800 sq ft minimum first-floor area applies to a one-storey house; for two to 2 1/2 storeys it is 650 sq ft. Single-family and two-family dwellings are both permitted by right in R-2, on one shared set of figures.
- The schedule caps accessory buildings separately, by percent of lot and by minimum distance to the principal building and to the side and rear lot lines.
Multifamily Residence - R-3 sets no flat minimum lot area. The schedule publishes 2,500 sq ft per dwelling unit and nothing else, so the number of units sets the land needed.
- Minimum first-floor area is 1,200 sq ft for a one-storey building and 1,000 sq ft for two to three storeys.
- Row houses, apartment houses and garden apartments are all principal permitted uses in R-3.
- The schedule caps accessory buildings separately, by percent of lot and by minimum distance to the principal building and to the side and rear lot lines.
Planned Residential - Every use in R-4P requires site plan review and approval. The 800 sq ft minimum first-floor area applies to a one-storey house; for two to three storeys it is 650 sq ft.
- The schedule caps accessory buildings separately, by percent of lot and by minimum distance to the principal building and to the side and rear lot lines.
Residential & Agricultural - R-A governs more land than the map shows for it: an R-1 parcel is governed as R-A wherever public water and sewer are unavailable.
- The 750 sq ft minimum first-floor area applies to dwellings only, not to the district's farm and agricultural uses.
- The schedule caps accessory buildings separately, by percent of lot and by minimum distance to the principal building and to the side and rear lot lines.
Residential Agricultural Limited - The schedule gives R-A1 its own row of uses but leaves every dimensional column blank, so it publishes no lot area, width, coverage, setback or height.
- The district's uses are all those of R-A, plus motels, golf courses, sand and gravel pits and gasoline stations by special permit.
ADUs vs. short-term rentals in Coeymans
No local short-term-rental law on record - which is not the same as permission for Town of Coeymans. Coeymans has no local short-term rental law, and that is not the same as permission. Confirm with the building department before counting on short-term rental income. 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 minimum0.23–1.84 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNational Grid territory.
- Zoning codeecode360.com/CO0785
- Building dept(518) 756-2850
ADU FAQ — Coeymans, NY
Are ADUs allowed in Coeymans, NY?
Town of Coeymans has 14 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (518) 756-2850.
Do I need a special permit for an ADU in Coeymans?
No. No district in Town of Coeymans permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (518) 756-2850 before ruling it out.
Can I use an ADU as a short-term rental in Coeymans?
No local short-term-rental law on record - which is not the same as permission for Town of Coeymans. 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 Coeymans
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 Coeymans, priced by size.
How we know this
- Sections analyzed
- 165 Attachment 5 Schedule of District Zoning Regulations; § 165-4 List of districts; § 165-7A
- Districts confirmed
- 14 of 14 — every mapped district.
- Last reviewed
- Not covered here
- Overlay districts, the zoning map, and any conditions attached to an individual parcel. Size limits and owner-occupancy terms sit in the code section above, not in this summary.
More on Coeymans: Full zoning for new construction · ADU build cost · House build cost · ADU rules across Albany County · All Albany County towns
ADU information for Town of Coeymans is compiled from the municipal code (last reviewed 2026-09-19) 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) 756-2850 before relying on any answer. Source: the Offsite / Aldo zoning dataset.