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ADU · Dutchess County

Are ADUs allowed in Dutchess 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 30 municipalities in Dutchess County, with what its zoning districts actually say.

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ADU rules by municipality in Dutchess County

Can you build an ADU in Beacon, NY?

All districts allow ADUs with occupancy restrictions.

An accessory apartment is permitted in every district, but only on a lot with a detached single-family house, and the owner must live in one of the units. It cannot be a short-term rental. Outside R1, RD and T it needs a legal single-family house already standing.

Ch. 223 Attachment 2 § 223-17 Schedule of Use Regulations (Supp 67, Feb 2026); § 223-24.1 Accessory apartments (L.L. No. 8-2025); § 223-41.3, § 223-41.4, § 223-41.13, § 223-41.21 Reviewed 2026-08-16 Full Beacon ADU rules →

Can you build an ADU in Poughkeepsie, NY?

14 districts prohibit ADUs, 2 allow them with occupancy restrictions.

An accessory apartment is permitted in RN-B and W-G, and the owner must permanently reside in at least one of the dwelling units on the lot. It is prohibited in RN-A, RN-C, RN-D, RC-3, RC-5, MU-3, MU-5, PID-A, PID-B, I-M, C-D, W, WTOD and PRD.

§ 19-5.5 Principal Use Table · § 19-5.4 (table key) · § 19-5.7 Accessory Apartments · § 19-4.1 Planned Residential Development District · § 19-1.5 Districts · L.L. No. 2-2025 § 2 Reviewed 2026-08-26 Full Poughkeepsie ADU rules →

Can you build an ADU in Amenia, NY?

7 districts allow ADUs with occupancy restrictions, 1 does not.

An accessory apartment is permitted by right in RA, RR, HM, HR, SR, HC and OC, and prohibited in M. It must be inside an owner-occupied structure or in an accessory structure on an owner-occupied property.

Ch. 121 Attachment 1 Use Table (amended 11-20-2019 by L.L. No. 2-2019 and 3-16-2023 by L.L. No. 4-2023); § 121-12C; § 121-74 definition Reviewed 2026-08-16 Full Amenia ADU rules →

Can you build an ADU in Beekman, NY?

8 districts prohibit ADUs, 5 require a special-use permit.

One accessory apartment inside or added onto a single-family house needs a Planning Board special use permit in R-135, R-90, R-45, PH and BH, and the owner must live in the house or the apartment. It is not permitted in R-MH, HR, SC, TC, C-1, C-2, C-3 or LC.

Ch. 155 Attachment 1 Schedule A Schedule of Permitted Uses (Supp 1, Oct 2024); § 155-25 Accessory apartments; § 155-25C ECHO units Reviewed 2026-08-16 Full Beekman ADU rules →

Can you build an ADU in Clinton, NY?

7 districts allow ADUs with a special-use permit, 2 do not.

An accessory unit, inside the house or detached, needs a special permit and site plan review in C, AR5, AR3, MR1, CR1, RH and H, and the owner must live in one of the units. It is prohibited in I and F.

250 Attachment 1 Schedule of Use Regulations, accessory uses table (amended through L.L. No. 4-2024); § 250-29 Accessory dwelling units; § 250-76 Two-family dwellings; § 250-3 Zoning districts Reviewed 2026-08-16 Full Clinton ADU rules →

Can you build an ADU in Dover, NY?

7 districts allow ADUs with occupancy restrictions, 1 does not.

An accessory apartment needs a Planning Board special permit in RU, RC, HM, HR, SR, HC and CO, and is prohibited in M. It must be inside an owner-occupied structure or in an accessory structure on an owner-occupied property.

Ch. 145 § 145-10B Use Table (amended 11-23-2009 by L.L. No. 2-2009); § 145-12C; § 145-12B(5); § 145-74 definition; § 145-8A districts Reviewed 2026-08-16 Full Dover ADU rules →

Can you build an ADU in East Fishkill, NY?

10 districts prohibit ADUs, 5 allow them with occupancy restrictions.

In R-3, R-2, R-1, R-1/3 and CRD an accessory apartment needs only a Building Department permit, the owner must live in one of the units, and a new owner must apply for renewal. It is not permitted in B-1, B-2, B-3, B-1A, HC, I-1, I-2, I-3, PCP or PRDP.

Ch. 194 Attachment 2 Schedule of Permitted Uses (amended 2-13-2025 by L.L. No. 1-2025); § 194-4; § 194-16; § 194-20; § 194-21; § 194-55.8 Estate cottage; § 194-87 Caretaker's apartments; § 194-91 Accessory residential units; Ch. 94 Elderly Cottage Housing Reviewed 2026-08-16 Full East Fishkill ADU rules →

Can you build an ADU in Fishkill, NY?

12 districts allow ADUs with occupancy restrictions, 4 do not.

In R-4A, R-2A, R-40, R-20, R-15, R-MF-3, R-MF-5, LHC and RB an accessory apartment needs only a building permit and certificate of occupancy, and the owner must live in the house or the apartment. It is not possible in PSC, which allows no house.

§ 150-40D Accessory apartments; 150 Attachment 1 Schedule of Regulations for Residential Districts; 150 Attachment 2 Schedule of Regulations for Nonresidential Districts; § 150-19 Reviewed 2026-08-16 Full Fishkill ADU rules →

Can you build an ADU in Hyde Park, NY?

All districts allow ADUs with a special-use permit.

An accessory apartment, inside a one-family house or in an outbuilding on its lot, needs a special use permit in every district, and the owner must live in one of the units. It can be at most 35% of the house's floor area, with no more than two bedrooms.

Ch. 108 Attachment 1 Schedule of Use Regulations (amended through L.L. No. 4-2025), row "Apartment, accessory"; § 108-8.4 Standards, accessory apartments; § 108-2.2 definition "Apartment, accessory" Reviewed 2026-08-16 Full Hyde Park ADU rules →

Can you build an ADU in La Grange, NY?

8 districts allow ADUs with a special-use permit, 6 do not.

An accessory apartment, inside the house or in a garage or barn, needs a special permit in RFD, RLD, RMD, RFS, TCR, TCB, H and GH, issued to the owner-occupant only and void if the owner moves out. It is not permitted in OPD, MGH, TPK, GB, C or I.

Ch. 240 Schedule A1, Schedule A2, Schedule A3 (§ 240-27); § 240-52 Accessory apartments; § 240-60 Carriage units Reviewed 2026-08-16 Full La Grange ADU rules →

Can you build an ADU in Milan, NY?

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

An accessory apartment needs a special use permit in A5A, A3A, R2A, HA and HB, and is not permitted in LC. It may be in or added to an existing one- or two-family dwelling, or in a separate accessory structure on the same lot.

Ch. 200 Art. V Supplementary Regulations (accessory apartments); Art. VIII Special Use Permits; Table A Schedule of Use Regulations (200 Attachment 1) Reviewed 2026-08-16 Full Milan ADU rules →

Can you build an ADU in North East, NY?

5 districts prohibit ADUs, 5 allow them with occupancy restrictions.

An accessory dwelling unit takes a zoning permit in A5A, R3A, R1A and R20K and site plan approval in LC, and the owner must live in the house or the unit, which may be let for at least 90 consecutive days. It is not permitted in BD-4, BD-West, BD-East, IB or M-A.

Ch. 180 (L.L. No. 1 of 2026): § 180-60 Accessory dwelling unit; Attachments 1R, 2R, 1NR, 2NR use schedules; § 180-19C Boulevard District 4; § 180-13 Uses prohibited for other than purposes specified Reviewed 2026-08-16 Full North East ADU rules →

Can you build an ADU in Pawling, NY?

6 districts allow ADUs with a special-use permit, 3 do not.

An accessory apartment needs a special use permit in CD, R-4, R-3, R-2, R-1 and HA. It is not permitted in VRD, and appears not to be permitted in HB or MBI. The owner must live in the main house or the apartment, and the other unit may be rented.

Ch. 215 Attachment 1 Schedule of Permitted Uses (Supp 46, amended 12-13-2023 by L.L. No. 7-2023); § 215-17.1; § 215-12B; § 215-17.2 Reviewed 2026-08-16 Full Pawling ADU rules →

Can you build an ADU in Pine Plains, NY?

All districts allow ADUs with a special-use permit.

An accessory dwelling needs a special use permit from the Planning Board in all eight base districts. The unit may be rented, but the principal dwelling must be owner-occupied for the duration of the permit.

Zoning Law (Oct 2009, updated Aug 2015) § 100-10 and Table A Schedule of Use Regulations; § 100-56D(1) standards; § 100-56D(2) and § 100-56E alternatives Reviewed 2026-08-16 Full Pine Plains ADU rules →

Can you build an ADU in Pleasant Valley, NY?

10 districts allow ADUs with occupancy restrictions, 5 do not.

An accessory dwelling unit inside, attached to or detached from a legally existing single-family house is permitted without a special permit in CONS, RA, RR, LDR, MDR, HDR, HR, H-PV, H-SP and H-WH, and the owner must live in one unit. It is prohibited in MHP, MC, OI, Q and SFH.

Ch. 98 Attachment 1 Schedule of Permitted Uses (Supp 42, Apr 2026); § 98-15 Accessory dwelling units (L.L. No. 7-2025); § 98-22 Caretaker/Guest cottages Reviewed 2026-08-16 Full Pleasant Valley ADU rules →

Can you build an ADU in Poughkeepsie, NY?

All districts allow ADUs with occupancy restrictions.

An accessory dwelling unit is permitted on any lot with a single-family house, in every district, with a permit from the Zoning Administrator, and the owner must live in one of the units. Where a new house is not permitted, a single-family house must already lawfully stand.

Ch. 210 § 210-47 Accessory dwelling units on single-family properties (L.L. No. 12-2024); § 210-10; §§ 210-14 to 210-41 district use lists; § 210-46 Reviewed 2026-08-16 Full Poughkeepsie ADU rules →

Can you build an ADU in Red Hook, NY?

11 districts allow ADUs with a special-use permit, 1 allows them, 1 does not.

An accessory apartment inside a single-family house needs a special use permit in LD, RD5, RD3, R1.5, R1, H, I, HB, B1 and B2, and is prohibited in WC. The owner does not have to live on the lot, so the unit can be rented.

Ch. 143 Attachment 1 District Schedule of Use Regulations (Supp 69, Dec 2025); § 143-55 Two-family dwellings (conversion); §§ 143-64, 143-65, 143-66 Accessory apartments; § 143-68 Cottages Reviewed 2026-08-16 Full Red Hook ADU rules →

Can you build an ADU in Rhinebeck, NY?

14 districts prohibit ADUs, 9 require a special-use permit, 1 allows them with occupancy restrictions.

An accessory dwelling unit needs a special use permit and site plan approval in HP20, RA10, RC5, RL5 and RM1, where the owner has to live in one of the two units. No second unit is permitted in BP, CRB, CBN, CBS, GWN, GWE, GWS, GB, ORP, LC, CIV, CIV2 or WH.

125 Attachment 2 District Schedule of Use Regulations (Supp 52, Nov 2025); § 125-68A Two-family dwelling by conversion; § 125-68D Accessory dwelling unit within the principal structure; § 125-68E Detached accessory dwelling unit; § 125-68F Elder cottage; § 125-15 Zoning districts; § 125-64.4 Workforce Housing District Reviewed 2026-09-01 Full Rhinebeck ADU rules →

Can you build an ADU in Stanford, NY?

All districts allow ADUs.

An accessory dwelling unit is permitted in all districts on a Building Inspector permit: one per lot, up to 1,500 sq ft of total floor area, accessory to a principal single-family residence. It may be rented, but not used as a short-term rental (§ 164-19.6).

Ch. 164 § 164-19.5 Accessory dwelling units (L.L. No. 1 of 2025); § 164-19.6 short-term rentals; § 164-8E District Schedule of Use Regulations Reviewed 2026-08-16 Full Stanford ADU rules →

Can you build an ADU in Union Vale, NY?

7 districts allow ADUs with a special-use permit, 2 do not.

An accessory apartment needs a special use permit in RD10, RA5, RA3, R1.5, R1 and H, in the house or a separate nondwelling structure, and in NC only within the house; it is prohibited in TC and A. The owner must live in one of the two units, and the other may be rented.

Ch. 210 Attachments 2 and 3, District Schedules of Use Regulations (Commercial and Residential); § 210-56B standards; § 210-56G(1) Reviewed 2026-08-16 Full Union Vale ADU rules →

Can you build an ADU in Wappinger, NY?

12 districts allow ADUs with occupancy restrictions, 8 do not.

An accessory apartment is permitted in R-5A, R-3A, R-80, R-40/80, R-40, R-20/40, R-20, R-15, R-10 and HM, and in RMF-3 and RMF-5 only with a one-family dwelling. It is not permitted in HD, NB, GB, SC, HB, CC, COP or AI.

Ch. 240 Attachment 1 and Attachment 2 Schedules of Use Regulations; § 240-5; § 240-53 Accessory apartments; § 240-60; § 240-61 Guest cottages and caretaker dwellings Reviewed 2026-08-16 Full Wappinger ADU rules →

Can you build an ADU in Washington, NY?

7 districts allow ADUs with a special-use permit, 2 do not.

A barn or outbuilding that existed on January 1, 1989 can become a unit by Planning Board special permit in RR-10, RS-10, RL-5, RS-5, RM-2, RH-1 and HM, and may be rented. New accessory housing in the R districts is also by special permit, only where the owner lives on the lot.

Ch. 165 Appendix A Schedule of District Use Regulations (Aug 2024); § 165-21A; § 165-40 Conversion of barns and accessory buildings; § 165-41 Accessory residential housing; § 165-70D; § 165-13 and § 165-29 Hamlet District Reviewed 2026-08-16 Full Washington ADU rules →

Can you build an ADU in Fishkill, NY?

All districts prohibit ADUs.

The Village code has no accessory apartment. Only R-7.5 allows a second dwelling, including by converting an existing house; elsewhere a homeowner cannot add a unit.

Ch. 171 Attachment 4 Schedule D Use Regulations for Residential Districts (L.L. No. 6-2015); Attachment 3 Schedule C Uses for Nonresidential Districts (L.L. No. 1-2022); § 171-8; § 171-12 Reviewed 2026-08-16 Full Fishkill ADU rules →

Can you build an ADU in Millbrook, NY?

All districts allow ADUs with a special-use permit.

An accessory apartment needs a Planning Board special permit, and the owner must live in one of the units. In RMF and GB one inside the house is not permitted; a detached one may be, but the code conflicts on whether it needs the special permit, so confirm with the Village.

Ch. 230 Attachment 1 Schedule of Permitted Uses and Special Permit Uses (amended 2-14-2024 by L.L. No. 2-2024); § 230-27 Accessory apartments; § 230-12; § 230-6 Reviewed 2026-08-16 Full Millbrook ADU rules →

Can you build an ADU in Millerton, NY?

7 districts prohibit ADUs, 3 require a special-use permit.

An accessory apartment needs a Planning Board special permit in R1A, R20000 and R10000 and is not allowed in GB, PRB, LB, HB-I, HB-II, LC or M. It must sit within an existing house or accessory building, or on a new house's foundation, and may be rented.

Ch. 170 § 170-10; §§ 170-13 to 170-22 district use lists; § 170-45 Accessory apartments; § 170-46 ECHO units Reviewed 2026-08-16 Full Millerton ADU rules →

Can you build an ADU in Pawling, NY?

5 districts allow ADUs with a special-use permit, 2 do not.

An accessory dwelling needs a Planning Board special use permit in R1, R2, R3, R4 and B2 and is not allowed in B1 or I1. The owner must live in the house or the unit as a primary residence, and the permit is void once ownership or the owner's residence changes.

Ch. 98 § 98-80 Accessory Dwellings; § 98-5 definitions; § 98-12 Table of Uses; Schedule A Schedule of Permitted Uses Reviewed 2026-08-16 Full Pawling ADU rules →

Can you build an ADU in Red Hook, NY?

3 districts allow ADUs, 3 do not.

An accessory dwelling is not possible in GB, GWB or LIB: none of them lists one, and LIB has no dwellings at all.

Ch. 200 § 200-6; §§ 200-8 to 200-14 district regulations; § 200-19 Accessory dwellings (L.L. No. 2-2022) Reviewed 2026-08-16 Full Red Hook ADU rules →

Can you build an ADU in Rhinebeck, NY?

3 districts allow ADUs with a special-use permit, 2 do not.

An accessory dwelling unit needs a Planning Board special permit in the VC, R and MP districts and is not allowed in GB or F. The owner must live in one of the two units on the lot for at least six months of the year.

Ch. 120 § 120-6 Allowable uses and Table 1 (amended 4-23-2024 by L.L. No. 3-2024); § 120-28 Accessory dwelling units; § 120-38C and D Fairgrounds Reviewed 2026-08-16 Full Rhinebeck ADU rules →

Can you build an ADU in Tivoli, NY?

All districts allow ADUs with a special-use permit.

An ADU needs a special permit on a one-family dwelling lot in the R-15000, R-1A, R-2A, R-3A, GB, RB and LC districts, inside a new, existing or expanded principal or accessory building. The unit may be rented, and there is no owner-occupancy requirement.

Ch. 231 § 231-23.1 Accessory dwelling units (added 8-14-2024 by L.L. No. 1-2024); 231 Attachment 8 District Schedule of Area and Bulk Regulations Reviewed 2026-08-16 Full Tivoli ADU rules →

Can you build an ADU in Wappingers Falls, NY?

5 districts prohibit ADUs, 2 require a special-use permit.

An accessory dwelling unit needs a special permit in the R and VR districts and is prohibited in RMU, VMU, VC, CMU and B. The owner must live in the house or the ADU as a primary residence, and the unit may not share a lot with a short-term rental or a Class 2 home occupation.

Ch. 151 § 151-68B Accessory Dwelling Units; Ch. 151 Attachment 2 Table 4 District Schedule of Uses (7.13.2023), adopted in the 10-17-2023 amendments Reviewed 2026-08-16 Full Wappingers Falls ADU rules →

ADU questions people ask about Dutchess County

Are ADUs allowed in Dutchess County?

There is no single county-wide answer — ADUs are governed by each town, city and village, not by the county. Of the 30 Dutchess County municipalities with mapped zoning districts, 29 allow an accessory dwelling unit in at least one district, and 3 allow one by right somewhere. The section for your municipality below gives the specific answer.

Does Dutchess 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 Dutchess 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 Dutchess County

Permission and budget are separate questions. See the Dutchess 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 Dutchess County: Zoning for new construction by town · Cost to build · ADU rules across every county we cover

ADU information for Dutchess County is compiled from each municipality's own code , most recently reviewed 2026-09-01, 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. Source: the Offsite / Aldo zoning dataset.

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