ADU · Columbia County
Can you build an ADU in Canaan, NY?
Town of Canaan has 10 districts. 5 districts allow ADUs, 3 require a special-use permit. 2 districts have incomplete data - verify with the building department at (518) 781-3144. Check your address to confirm the district that applies to your parcel:
What the Canaan 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 |
|---|---|---|---|---|
| Medium Density Residential (2-acre) | 2 ac | 75 / 25 / 25 ft | 35 ft | As of right |
| Medium Density Residential (5-acre) | 5 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| Rural Density Residential (2-acre) | 2 ac | 75 / 25 / 25 ft | 35 ft | As of right |
| Rural Density Residential (5-acre) | 5 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| Agricultural Density (10-acre) | 10 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| General Business | 0.5 ac | 100 / 25 / 25 ft | 35 ft | Special permit |
| General Commercial | 2 ac | 100 / 25 / 25 ft | 35 ft | Special permit |
| Light Industrial | 2 ac | 100 / 25 / 25 ft | 35 ft | Special permit |
| Mobile Homes (2-acre) | 2 ac | 75 / 25 / 25 ft | 35 ft | — |
| Mobile Homes (5-acre) | 5 ac | 75 / 50 / 50 ft | 35 ft | — |
Medium Density Residential (2-acre), Medium Density Residential (5-acre), Rural Density Residential (2-acre), Rural Density Residential (5-acre) — THE 2-ACRE AND 5-ACRE DISTRICTS ARE THE SAME DISTRICT AT DIFFERENT DEPTHS. Schedule note ** runs the two-acre zone 450 ft back from the road centreline; a building site beyond that 450 ft is in the FIVE-acre district instead, with 350 ft of lot width and 50 ft side and rear yards rather than 200 ft and 25 ft. Depth from the road is a location, not a condition axis, so the pair is carried as two district records rather than as variants. ALL SETBACKS ARE MEASURED FROM THE CENTRELINE of the travelled/paved section of the road or way (schedule note **), NOT from the property line — so a front yard here is not comparable to one measured the usual way. Maximum building height is 35 ft in every district; a wind energy conversion system may reach 40 ft. LIVING AREA IS SET BY STOREYS: a one-storey dwelling needs at least 600 sq ft of finished FIRST FLOOR living area — the figure recorded above — and a two-storey dwelling at least 1,000 sq ft across BOTH floors above the basement. The two figures have different denominators and storey count is not a condition axis, so only the one-storey case is recorded. No lot may contain more than one single-family dwelling, nor more than one accessory dwelling.
Agricultural Density (10-acre) — RA-4 is a single 10-acre district and does not split by depth from the road. ALL SETBACKS ARE MEASURED FROM THE CENTRELINE of the travelled/paved section of the road or way (schedule note **), NOT from the property line — so a front yard here is not comparable to one measured the usual way. Maximum building height is 35 ft in every district; a wind energy conversion system may reach 40 ft. LIVING AREA IS SET BY STOREYS: a one-storey dwelling needs at least 600 sq ft of finished FIRST FLOOR living area — the figure recorded above — and a two-storey dwelling at least 1,000 sq ft across BOTH floors above the basement. The two figures have different denominators and storey count is not a condition axis, so only the one-storey case is recorded. No lot may contain more than one single-family dwelling, nor more than one accessory dwelling.
General Business — SETBACKS HERE ARE A DEFAULT, NOT A FIXED FIGURE: schedule note * has the Planning Board determine the minimum setbacks as part of site plan approval wherever such approval is required. Buildings and structures in C-1 may total no more than 4,000 sq ft of enclosed building area, and all uses together may not exceed 20% of the lot area — which is the coverage figure recorded above. ALL SETBACKS ARE MEASURED FROM THE CENTRELINE of the travelled/paved section of the road or way (schedule note **), NOT from the property line — so a front yard here is not comparable to one measured the usual way. Maximum building height is 35 ft in every district; a wind energy conversion system may reach 40 ft. LIVING AREA IS SET BY STOREYS: a one-storey dwelling needs at least 600 sq ft of finished FIRST FLOOR living area — the figure recorded above — and a two-storey dwelling at least 1,000 sq ft across BOTH floors above the basement. The two figures have different denominators and storey count is not a condition axis, so only the one-storey case is recorded. No lot may contain more than one single-family dwelling, nor more than one accessory dwelling.
General Commercial — SETBACKS HERE ARE A DEFAULT, NOT A FIXED FIGURE: schedule note * has the Planning Board determine the minimum setbacks as part of site plan approval wherever such approval is required. Buildings and structures in C-2 may total no more than 30,000 sq ft of enclosed building area, and all uses together may not exceed 20% of the lot area — the coverage figure above. Boats, vehicles, machinery and building materials may be stored and displayed only within secured, landscaped and buffered areas or open sheds, which count as enclosed building area. ALL SETBACKS ARE MEASURED FROM THE CENTRELINE of the travelled/paved section of the road or way (schedule note **), NOT from the property line — so a front yard here is not comparable to one measured the usual way. Maximum building height is 35 ft in every district; a wind energy conversion system may reach 40 ft. LIVING AREA IS SET BY STOREYS: a one-storey dwelling needs at least 600 sq ft of finished FIRST FLOOR living area — the figure recorded above — and a two-storey dwelling at least 1,000 sq ft across BOTH floors above the basement. The two figures have different denominators and storey count is not a condition axis, so only the one-storey case is recorded. No lot may contain more than one single-family dwelling, nor more than one accessory dwelling.
Light Industrial — SETBACKS HERE ARE A DEFAULT, NOT A FIXED FIGURE: schedule note * has the Planning Board determine the minimum setbacks as part of site plan approval wherever such approval is required. C-3 has NO limit on enclosed building area or lot area, which is why no coverage figure is recorded — but every use is subject to site plan approval AND a special permit. ALL SETBACKS ARE MEASURED FROM THE CENTRELINE of the travelled/paved section of the road or way (schedule note **), NOT from the property line — so a front yard here is not comparable to one measured the usual way. Maximum building height is 35 ft in every district; a wind energy conversion system may reach 40 ft. LIVING AREA IS SET BY STOREYS: a one-storey dwelling needs at least 600 sq ft of finished FIRST FLOOR living area — the figure recorded above — and a two-storey dwelling at least 1,000 sq ft across BOTH floors above the basement. The two figures have different denominators and storey count is not a condition axis, so only the one-storey case is recorded. No lot may contain more than one single-family dwelling, nor more than one accessory dwelling.
Mobile Homes (2-acre), Mobile Homes (5-acre) — RA-3 Mobile Homes is a district in Article IV.A — "RA-3 Mobile Homes (2 and 5 acre zones)" — and has its own column in the Density Requirements table. THE 2-ACRE AND 5-ACRE DISTRICTS ARE THE SAME DISTRICT AT DIFFERENT DEPTHS. Schedule note ** runs the two-acre zone 450 ft back from the road centreline; a building site beyond that 450 ft is in the FIVE-acre district instead, with 350 ft of lot width and 50 ft side and rear yards rather than 200 ft and 25 ft. Depth from the road is a location, not a condition axis, so the pair is carried as two district records rather than as variants. ALL SETBACKS ARE MEASURED FROM THE CENTRELINE of the travelled/paved section of the road or way (schedule note **), NOT from the property line — so a front yard here is not comparable to one measured the usual way. Maximum building height is 35 ft in every district; a wind energy conversion system may reach 40 ft. LIVING AREA IS SET BY STOREYS: a one-storey dwelling needs at least 600 sq ft of finished FIRST FLOOR living area — the figure recorded above — and a two-storey dwelling at least 1,000 sq ft across BOTH floors above the basement. The two figures have different denominators and storey count is not a condition axis, so only the one-storey case is recorded. No lot may contain more than one single-family dwelling, nor more than one accessory dwelling.
ADUs vs. short-term rentals in Canaan
Short-term-rental status not confirmed for Town of Canaan. An STR local law was in the public-hearing process through spring 2025 (hearing held March 2025) and its adoption could not be confirmed. The Town Zoning Law as published (updated October 2024) contains no short-term-rental provision — it regulates a BED AND BREAKFAST, defined as an owner-occupied single-family dwelling serving no more than ten transient lodgers, permitted by right in its smaller form and by special permit at three or more rooms — so if the 2025 law was adopted it sits outside the document currently published. Ask the Town whether it passed before relying on either answer. 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 Canaan at (518) 781-3144 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 minimum2–10 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNYSEG territory.
- Zoning codecanaannewyork.org/wp-content/uploads/2024/10/Zoning-Laws-and-Regulations.pdf
- Building dept(518) 781-3144
- Last reviewed2026-06-02
ADU FAQ — Canaan, NY
Are ADUs allowed in Canaan, NY?
Town of Canaan has 10 districts. 5 districts allow ADUs, 3 require a special-use permit. 2 districts have incomplete data - verify with the building department at (518) 781-3144. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Canaan?
It depends on the district: 3 of 10 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 Canaan?
Short-term-rental status not confirmed for Town of Canaan. 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 Canaan
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 Canaan, priced by size.
More on Canaan: Full zoning for new construction · ADU build cost · House build cost · All Columbia County towns
ADU information for Town of Canaan is compiled from the municipal code (last reviewed 2026-06-02) 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) 781-3144 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.