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ADU · Saratoga County

Are ADUs allowed in Saratoga County, NY?

There is no county-wide answer. In New York an accessory dwelling unit is governed by the town, city or village — so the rule changes at every municipal line, and often between districts inside one town. Below is each of the 28 municipalities in Saratoga County, with what its zoning districts actually say.

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ADU rules by municipality in Saratoga County

Can you build an ADU in Mechanicville, NY?

All districts prohibit ADUs.

The City of Mechanicville has no accessory dwelling unit provision, so an accessory dwelling unit is not permitted in R, MFTR, GC, RC, LI or WMU. The second unit here is an ordinary use question instead.

Ch. 200 § 200-11D per-unit lot area; § 200-12 Multifamily/Townhouse Residential; § 200-30 parking Reviewed 2026-08-02 Full Mechanicville ADU rules →

Can you build an ADU in Saratoga Springs, NY?

14 districts prohibit ADUs, 7 require a special-use permit, 2 allow them with occupancy restrictions.

A second dwelling unit is limited to UR-3 and UR-4 by right and to NCU, AC and UN by special use permit. The other route, converting a historic carriage house or barn, is a special use in RR, SR, UR-1, UR-2, UR-3 and UR-4 (§ 240-8.4GG).

Reviewed 2026-07-29 Full Saratoga Springs ADU rules →

Can you build an ADU in Ballston, NY?

7 districts allow ADUs, 4 do not.

In HR, MU Route 50/67, BHC, MU BL and RHT, an accessory dwelling inside the principal dwelling needs no Planning Board approval (§ 138-163C). The detached form, in an accessory structure, needs a special use permit and is allowed only in R and BLR.

Ch. 138 § 138-163 accessory residential dwellings (amended 5-14-2024 by L.L. No. 3-2024); district use tables Reviewed 2026-07-31 Full Ballston ADU rules →

Can you build an ADU in Charlton, NY?

All districts allow ADUs.

An ADU within or attached to a house is permitted in R, A and HO, and a detached ADU needs a special use permit. Either way the lot must be at least 10 acres.

Zoning Law (adopted January 26, 2026) Table IV-1 use table; Article IV Section 4(12) ADU standards; Subdivision Regulations cross-reference Reviewed 2026-08-01 Full Charlton ADU rules →

Can you build an ADU in Clifton Park, NY?

18 districts prohibit ADUs, 4 require a special-use permit.

An accessory apartment or accessory dwelling is not an allowed use in B-1, B-2, HM, B-3, B-4, B-4A, B-5, PIR, LI or LC. The town's only accessory unit, the kinship-restricted in-law apartment of § 208-7, attaches to the two-family dwelling special use in R-3, R-1, CR and HR.

Reviewed 2026-07-30 Full Clifton Park ADU rules →

Can you build an ADU in Corinth, NY?

All districts prohibit ADUs.

Corinth has no accessory dwelling unit. An accessory apartment has no path to approval in any district, so a second unit has to be a principal dwelling, and it is priced accordingly.

L.L. No. 1-2024 district use tables (all eleven districts); accessory use and accessory outdoor storage rows Reviewed 2026-08-01 Full Corinth ADU rules →

Can you build an ADU in Day, NY?

All districts prohibit ADUs.

The Town of Day has no accessory dwelling unit provision, so an accessory dwelling unit is not permitted in LR, NC, RMD, RLD or RRC. A multi-family dwelling or apartment house in RMD or RLD, by site plan approval, is the only route to a second unit.

Zoning Law § 4.1E Adirondack Park regional projects; § 8.5 proportional yard reduction; § 9.4 nonconforming lots of record; district use schedules Reviewed 2026-08-03 Full Day ADU rules →

Can you build an ADU in Edinburg, NY?

All districts prohibit ADUs.

An accessory dwelling unit is not permitted in any district here. Two routes lead to a second unit: a multiple family dwelling, which needs a full district minimum lot for each unit (§ 6.9(1)) and is unavailable in LR, and a § 13.2 cluster subdivision.

Zoning Law § 6.9(1) multiple family land area; § 3.1.1 Lakefront Residential; § 4.1 minimum lot sizes; § 8.1 nonconforming lots of record Reviewed 2026-08-03 Full Edinburg ADU rules →

Can you build an ADU in Galway, NY?

4 districts allow ADUs with a special-use permit, 1 does not. 1 district has incomplete data - verify with the building department at (518) 882-6070.

Under § 115-52 a single-family dwelling in AR, RC, RH or L may have one accessory apartment with a special use permit from the Planning Board, inside the principal building or in an accessory building on the same lot. It is not permitted in C1.

Ch. 115 § 115-52 accessory apartments; Appendix 3A dimensional schedule note 5 Reviewed 2026-08-02 Full Galway ADU rules →

Can you build an ADU in Greenfield, NY?

6 districts allow ADUs, 1 does not.

An in-law apartment is permitted as an accessory use in LDR, MDR1, MDR2, TC, OR and PR, with no special permit and no site plan review. Despite the name it carries no kinship and no owner-occupancy condition, so it can be let as an ordinary rental.

Ch. 105 § 105-7 definition; § 105-124 in-law apartments (amended 11-12-2009 by L.L. No. 2-2009); Appendix D use and dimensional tables Reviewed 2026-07-31 Full Greenfield ADU rules →

Can you build an ADU in Halfmoon, NY?

All districts prohibit ADUs.

An accessory dwelling unit is not an available use in any Halfmoon district. A two-family dwelling is a different route to a second unit: it is a special-permit use in A-R and R-1 and a permitted use in R-3.

Reviewed 2026-07-27 Full Halfmoon ADU rules →

Can you build an ADU in Malta, NY?

All districts prohibit ADUs.

The zoning chapter provides no residential accessory dwelling unit anywhere in the town. The one accessory dwelling it defines is an employee unit inside a commercial building, not a rental unit accessory to a house.

Reviewed 2026-07-31 Full Malta ADU rules →

Can you build an ADU in Milton, NY?

8 districts allow ADUs with a special-use permit, 1 does not.

An accessory dwelling needs a special permit, and Milton's residential form must be devoted exclusively to housing family members, so it cannot be rented to a non-relative.

Ch. 180 § 180-5 definitions (dwelling, accessory — residential and — nonresidential); the district Use Schedule, principal and accessory rows Reviewed 2026-07-31 Full Milton ADU rules →

Can you build an ADU in Moreau, NY?

All districts prohibit ADUs.

Accessory dwelling units are not permitted in any Moreau district. The routes to a second unit are principal uses: a two-family dwelling, multifamily housing in UR, or housing combined with commercial facilities in C-2 by special permit.

Reviewed 2026-07-31 Full Moreau ADU rules →

Can you build an ADU in Northumberland, NY?

All districts prohibit ADUs.

The Town has no accessory dwelling unit. A second unit comes instead as a duplex: in R-1 and C/R it takes 1 acre with 150 ft of frontage, the same land a single-family dwelling needs, at 30% coverage against the house's 20%.

Zoning Ordinance Attachment A district schedules — permitted principal, accessory and special permit use blocks; duplex dimensional rows Reviewed 2026-08-02 Full Northumberland ADU rules →

Can you build an ADU in Providence, NY?

The only district allows ADUs.

One apartment is allowed by right in an ancillary building on the lot, where that building's primary use is non-residential, such as a barn, shop or garage. It cannot go inside the house, in an addition, or in a purpose-built cottage.

Local Law No. 2 of 2007, Art. III § 2(A) and (B)(1); Appendix A definition of dwelling unit Reviewed 2026-08-04 Full Providence ADU rules →

Can you build an ADU in Saratoga, NY?

5 districts prohibit ADUs, 3 allow them.

An accessory building apartment, a unit inside a detached accessory building such as a garage, is a permitted use in R, K and C, with no special permit and no site plan review. It is not permitted in RR, VE, H, LC or LR.

Ch. 400 Article IX use and dimensional tables (accessory building apartment); § 400-16.3 sanitary standards (added 7-13-2015 by L.L. No. 1-2015) Reviewed 2026-07-31 Full Saratoga ADU rules →

Can you build an ADU in Stillwater, NY?

8 districts allow ADUs, 3 do not.

An attached accessory dwelling unit is permitted, with no special permit or site plan review, in CSR, SLZ-1, T2, T3N, T3G, T3G-1, T4 and T5. It must share a common wall with the principal dwelling.

Ch. 210 § 210-7 definition of dwelling unit, attached accessory; district use tables Reviewed 2026-07-31 Full Stillwater ADU rules →

Can you build an ADU in Waterford, NY?

All districts prohibit ADUs.

Waterford has no accessory dwelling unit of any kind, and an accessory apartment has no route to approval in any district. A second unit has to be a principal dwelling instead, which is expensive in land.

Reviewed 2026-07-31 Full Waterford ADU rules →

Can you build an ADU in Wilton, NY?

7 districts prohibit ADUs, 3 allow them, 3 require a special-use permit. 1 district has incomplete data - verify with the building department at (518) 587-1939.

An accessory apartment, a rentable second unit with no owner-occupancy or family condition, is allowed by right in RB-1, CR-1 and CR-2 and by special permit in R-1, R-2 and R-3. It is not allowed in R-M, H-1, C-1, C-2, C-3, I-1 or CRT.

Reviewed 2026-07-28 Full Wilton ADU rules →

Can you build an ADU in Ballston Spa, NY?

All districts prohibit ADUs.

An accessory dwelling unit has no route to approval in any Ballston Spa district. A second unit comes only as a principal use, such as a two-family dwelling, which is permitted by right in R-2 only.

Ch. 205 Schedule A district use and dimensional schedule; residential and apartment-over-office rows Reviewed 2026-08-01 Full Ballston Spa ADU rules →

Can you build an ADU in Corinth, NY?

All districts prohibit ADUs.

The Village of Corinth has no accessory dwelling unit. A second unit comes only as a principal use: in VR-I and VR-II a two-family dwelling takes exactly the same lot, width, yards and coverage as a single-family house.

Ch. 500 Schedule 1 district dimensional standards; accessory use row; two-family, multifamily and business-with-residence-above rows Reviewed 2026-08-01 Full Corinth ADU rules →

Can you build an ADU in Round Lake, NY?

All districts prohibit ADUs.

The Village of Round Lake has no accessory dwelling unit provision, so an accessory dwelling unit is not permitted in RV-1, RV-2, CV-1 or LCV.

Ch. 180 § 180-13 RV-1; § 180-14 RV-2; § 180-3 definitions and § 180-30B as replaced by L.L. No. 1-2026 (uncodified) Reviewed 2026-08-02 Full Round Lake ADU rules →

Can you build an ADU in Schuylerville, NY?

4 districts prohibit ADUs, 4 require a special-use permit.

An accessory apartment is a special use in R-A, R-B, HM-S and C-B, and it is not available in R-C, C-H, R-R or E-D. The owner has to live in the structure or on the property, so this is not an investor product.

Village Zoning § 8A(1) and § 8A(4) accessory apartments; § 6 definitions; § 3.14A multiple principal structures; district dimensional tables Reviewed 2026-08-02 Full Schuylerville ADU rules →

Can you build an ADU in South Glens Falls, NY?

All districts prohibit ADUs.

An accessory dwelling unit is not permitted in any South Glens Falls district. The route to a second unit is a two-family dwelling in R-2, either built new as a principal permitted use or converted under § 153-19A(2).

Ch. 153 § 153-19A(1) and (2)(a)-(e) conversions; § 153-17E(4); district use lists Reviewed 2026-08-02 Full South Glens Falls ADU rules →

Can you build an ADU in Stillwater, NY?

All districts allow ADUs with occupancy restrictions.

An accessory dwelling unit is permitted by right in V3, V4 and V5, with no special use permit and no site plan review, but the owner of the one-family dwelling must occupy one of the two units.

Village Form-Based Code § 3.3(A)-(D) accessory dwelling units; § 3.5 bed and breakfast; Article X definitions Reviewed 2026-08-02 Full Stillwater ADU rules →

Can you build an ADU in Victory, NY?

All districts allow ADUs with a special-use permit.

An accessory apartment is available in SF-1, SF-2 and MUVC by special use permit, but only within a single-family dwelling: a detached unit, a garage conversion or a carriage house is not available here.

Zoning Law Article 5-A accessory apartments (1)-(9); Appendix A Area and Bulk Schedule, note 2 Reviewed 2026-08-02 Full Victory ADU rules →

Can you build an ADU in Waterford, NY?

4 of 5 districts prohibit ADUs. 1 district has incomplete data - verify with the building department.

The Village of Waterford has no accessory dwelling unit. A second unit comes only as a principal use, such as a two-family dwelling, which in the Residence and Residence-S districts needs the same 4,000 sq ft lot as a one-family house.

Ch. 205 § 205-18 use and dimensional columns; § 205-18A(1) coverage; § 205-18A(3) accessory building yards Reviewed 2026-08-01 Full Waterford ADU rules →

Saratoga County municipalities with no published zoning code

These 2 municipalities have no zoning code we can read online, which means an ADU question has to be answered by the municipality itself.

ADU questions people ask about Saratoga County

Are ADUs allowed in Saratoga County?

There is no single county-wide answer — ADUs are governed by each town, city and village, not by the county. Of the 28 Saratoga County municipalities with mapped zoning districts, 14 allow an accessory dwelling unit in at least one district, and 7 allow one by right somewhere. The section for your municipality below gives the specific answer.

Does Saratoga County issue ADU permits?

No. Zoning approval and building permits both come from the municipality — the town, city or village — not the county. County health departments do commonly review septic and water supply for a new dwelling unit, which is often the binding constraint on a rural lot.

What size ADU can I build in Saratoga County?

Size caps are set per municipality and frequently per district, and they are one of the details most often stated wrongly by national ADU sites. Open your municipality's page below for the code sections analyzed, then confirm the current figure with the building department before you design to it.

What an ADU costs to build in Saratoga County

Permission and budget are separate questions. See the Saratoga County cost-to-build breakdown for current per-square-foot ranges — an accessory unit runs above a full house per square foot, because the kitchen, bath, panel and heating plant cost the same at any size.

Run the free ADU check for your parcel →

More on Saratoga County: Zoning for new construction by town · Cost to build · ADU rules across every county we cover

ADU information for Saratoga County is compiled from each municipality's own code , most recently reviewed 2026-08-04, and provided for decision-support only — not legal or architectural advice. Eligibility, size, owner-occupancy and permit conditions vary by district and often carry exceptions; confirm with the municipality before relying on any answer. 3 of the 28 municipalities below still have one or more districts that have not been analyzed, and each says so in its own section. Source: the Offsite / Aldo zoning dataset.

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