ADU · Saratoga County
Can you build an ADU in Wilton, NY?
Town of Wilton has 14 districts. 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. Check your address to confirm the district that applies to your parcel:
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What the Wilton 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 |
|---|---|---|---|---|
| Residential 1 — the Town's principal single-family district and the one most Northway-corridor house lots sit in (one-family dwelling: min lot 20,000 sf with municipal water AND sewer, 30,000 sf with water OR sewer, 40,000 sf with neither; minimum frontage 100 ft on full utilities, 150 ft otherwise; 35 ft height; 50 ft front, 20 ft side on full utilities / 25 ft otherwise, 50 ft rear; minimum floor area 750 sf. CORNER LOTS: the minimum lot size rises to 30,000 sf and the frontage requirement becomes 150 ft on EACH road (Schedule A notes 1 and 2). A two-family dwelling with accessory apartment is a SPECIAL PERMIT use at a much larger lot — 40,000 sf / 200 ft on full utilities, 60,000 sf / 250 ft with one, 80,000 sf / 250 ft with none (side yard 40 ft in that last case) — with a 1,500 sf minimum floor area. Other special-permit uses: temporary mobile homes (§ 129-176Q), parks (30,000 sf / 200 ft, 50 ft yards all around) and public utilities (80,000 sf / 200 ft). Home occupations follow § 129-176C. GREEN SPACE, NOT COVERAGE: Wilton states a minimum 35% GREEN SPACE for this district and no maximum building coverage at all — see maxLotCoverage, which is null by design.) | 0.46 ac | 50 / 20 / 50 ft | 35 ft | Special permit |
| Residential 2 — Wilton's large-lot rural residential district (one-family dwelling: 100,000 sf minimum lot, 250 ft frontage, 35% minimum green space, 35 ft height, 50 ft front, 40 ft side, 50 ft rear, 750 sf minimum floor area). NOTE the contrast with R-1: R-2 states a SINGLE flat lot minimum with no municipal-utility ladder — 100,000 sf regardless of service — because the district is not expected to be sewered. Agricultural use WITHOUT animals is a principal permitted use at 200,000 sf / 400 ft with 60 ft front, 50 ft side and 100 ft rear. Special permit uses run large: agriculture WITH animals 200,000 sf / 400 ft (75 ft front, 100 ft side, 100 ft rear); boarding of horses and riding stables 400,000 sf / 400 ft; private stables 120,000 sf / 400 ft; boardinghouses, tourist homes and bed-and-breakfast facilities 100,000 sf / 250 ft; two-family dwelling with accessory apartment 150,000 sf / 250 ft (1,500 sf minimum floor area); places of worship, parish houses and rectories 120,000 sf / 250 ft; NYS Regents-approved private schools 120,000 sf / 250 ft; public utilities 120,000 sf / 300 ft; parks 40,000 sf / 250 ft. GREEN SPACE, NOT COVERAGE: the 35% figure is a minimum green space requirement, not a maximum building coverage — Wilton sets no building-coverage percentage in this district. | 2.3 ac | 50 / 40 / 50 ft | 35 ft | Special permit |
| Residential 3 — the Town's most restrictive residential district, with the deepest yards in Wilton (one-family dwelling: 120,000 sf minimum lot, 400 ft frontage, 35% minimum green space, 35 ft height, 75 ft front, 100 ft side, 200 ft rear, 720 sf minimum floor area). The 200 ft REAR yard and 100 ft side yards are the binding constraint here far more often than the lot area — a 120,000 sf lot that is not deep enough simply cannot be built on. Like R-2 there is NO municipal-utility ladder; the figure is flat. Agricultural use without animals is permitted at 200,000 sf / 400 ft (60 ft front, 50 ft side, 100 ft rear). Special permit uses: agriculture with animals 200,000 sf / 400 ft; boardinghouses, tourist homes and bed-and-breakfast facilities 120,000 sf / 400 ft; two-family dwelling with accessory apartment 120,000 sf / 400 ft (1,500 sf minimum floor area, same yards as the one-family case); private stables 120,000 sf / 400 ft; public utilities 120,000 sf / 300 ft with 100 ft front, 100 ft side and 200 ft rear; parks 40,000 sf / 250 ft with 50 ft yards. Temporary mobile homes follow § 129-176Q and home occupations § 129-176C. GREEN SPACE, NOT COVERAGE: the 35% figure is a minimum green space requirement; Wilton sets no building-coverage percentage in this district. | 2.75 ac | 75 / 100 / 200 ft | 35 ft | Special permit |
| Mobile Homes and Mobile Home Parks District (Schedule D carries NO figures — it says only 'See Article VIII', so all standards below come from § 129-42 directly. The PARK is the unit of development: it must be at least 10 ACRES with 250 ft of frontage on a public road, on a well-drained site graded for rapid runoff and cleared of brush. The recorded minLotSize is that 10-acre park minimum. INDIVIDUAL MOBILE HOME LOTS inside the park are much smaller and run on a utility ladder of their own: 10,000 sf with a minimum narrow dimension of 75 ft where served by central water AND connected to the Saratoga County Sewer System, or 15,000 sf with a 100 ft narrow dimension where served by central water only. SETBACKS are stated as separation distances in § 129-42C: no mobile home may be nearer than 100 ft to an adjacent property line, 100 ft to a public street or highway, 35 ft to an adjacent mobile home in any direction, or 25 ft to the nearest edge of any roadway inside the park; accessory structures must be at least 15 ft from any adjacent mobile home. A 75 ft BUFFER is required around the entire perimeter of the park along adjacent property lines. Access: each park must be readily accessible from an existing public highway, and a park with more than six mobile homes needs two points of entry and exit unless a large improved emergency-vehicle turnaround is maintained. Article VIII sets NO maximum height and NO coverage percentage, so both fields are null — that is the code, not a gap. New parks and expansions go to the Planning Board for a conceptual submission and SEQR review, then to the Town Board for a public hearing, under § 129-41.) | 10 ac | 100 / 100 / 100 ft | — | No |
| Residential Business District — a mixed residential-and-small-business district and the friendliest district in Wilton for a second unit (one-family dwelling: min lot 20,000 sf with municipal water AND sewer, 30,000 sf with water OR sewer, 40,000 sf with neither; frontage 100 ft on full utilities, 150 ft otherwise; 35% minimum green space; 35 ft height; 30 ft front — noticeably shallower than R-1's 50 ft — 20 ft side on full utilities / 25 ft otherwise, 50 ft rear. CORNER LOTS: minimum lot size 30,000 sf and 150 ft of frontage on each road. A TWO-FAMILY DWELLING WITH ACCESSORY APARTMENT is a PRINCIPAL PERMITTED use here at 40,000 sf / 200 ft with municipal water and sewer — no special permit needed; a plain two-family needs 60,000 sf / 250 ft with one utility or 80,000 sf / 250 ft with none. HEIGHT: the 35 ft figure is occupied height — note 3 allows 55 ft with 20 ft of unoccupied space; senior living communities are allowed 45 ft. Special permit uses at 40,000 sf / 200 ft include nursery and garden centers, landscape services, small business offices and small retail businesses (each under 10,000 gross square feet across all buildings), restaurants without drive-through service, day-care centers and self-service storage; larger thresholds apply to business offices and clubs (60,000 sf), bed-and-breakfast facilities, boardinghouses, tourist homes and training facilities (80,000 sf), and places of worship, hotels/motels/tourist cabins of 25 units or less, public utilities and senior living communities (120,000 sf). PAVED AREA setbacks are separate (note 4): 15 ft side and rear, 30 ft front — but where a use abuts R-1, R-2, R-3 or an exclusively residential PUD, the paved-area side or rear setback rises to between 50 ft and 100 ft, with the Planning Board fixing the figure based on the quality of the proposed buffer. The boarding of animals is specifically prohibited in RB-1 and H-1. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space; there is no building-coverage percentage.) | 0.46 ac | 30 / 20 / 50 ft | 35 ft | As of right |
| Hamlet One District — Wilton's walkable, pedestrian-oriented mixed-use core and by a wide margin its densest zoning (a FLAT 10,000 sf minimum lot and 80 ft of frontage for EVERY use in the district, residential or commercial, with 35% minimum green space, 35 ft height and 15 ft side / 30 ft rear yards). FRONT YARD IS A RANGE, NOT A MINIMUM: Schedule G states '25 to 35' feet, a build-to band intended to hold a consistent street wall rather than a simple setback floor; the recorded 25 ft is the near edge of that band and a design must land inside it. CORNER LOTS: minimum lot size rises to 15,000 sf. Both one-family AND two-family dwellings are principal permitted uses at the same 10,000 sf — no utility ladder anywhere in this district. MIXED-USE BUILDINGS combining retail or office with residential are permitted, and note 6 is the important one: residential uses include multifamily apartments at a maximum density of 8 UNITS PER ACRE, and the nonresidential component must occupy at least 10% of the building's gross floor area. Retail, restaurants, business offices, convenience stores, banks, laundromats, dry cleaners, personal service shops and day-care centers are permitted under 2,500 gross leasable square feet; above 2,500 sf each requires a special permit from the Planning Board under § 129-176. HEIGHT (note 2): 35 ft occupied, but the front 50 ft of a building adjacent to the roadway may reach 50 ft with 15 ft of unoccupied space, and the remainder 55 ft with 20 ft unoccupied. Nonresidential uses abutting residential uses need a combined 20 ft setback, or 60 ft if a rear setback (note 4). Pavement setbacks are 30 ft front and 15 ft side or rear (note 5). Senior living communities require Town Board approval. The boarding of animals is specifically prohibited in H-1 and RB-1. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space, not a maximum building coverage.) | 0.23 ac | 25 / 15 / 30 ft | 35 ft | No |
| Commercial District — the Route 9 general commercial district (most uses: 40,000 sf minimum lot, 200 ft frontage, 25% minimum green space, 35 ft height, 50 ft front, 30 ft side, and a rear yard of 50 ft for office/bank/convenience/nursery/bowling/boardinghouse/personal-service uses or 100 ft for the more intensive ones — restaurants, veterinary hospitals, funeral parlors, drive-through establishments, retail and wholesale businesses, service stations and automotive repair, indoor-outdoor recreation, laundromats, kennels and outdoor/automobile/mobile-home sales. Larger minimums apply to motels and hotels, federal/state/local offices, public libraries and museums, pet cemeteries, golf and country clubs, clubs and lodges, and places of worship at 120,000 sf; hospitals and health services at 200,000 sf / 300 ft with 100 ft side and rear; animal farms at 400,000 sf / 400 ft; and ENCLOSED SHOPPING MALLS at 2,178,000 sf — a deliberate 50-acre threshold, with 300 ft frontage and 100 ft side and rear yards. Special permit uses: senior living communities 120,000 sf (45 ft height, Town Board approval), public utilities 120,000 sf / 300 ft, day-care centers 40,000 sf. HEIGHT note 2: 35 ft occupied, up to 55 ft with 20 ft of unoccupied space. RESIDENTIAL USE IS SPECIFICALLY PROHIBITED in this zone. BUFFER RULE (note 1): where a C-1 use abuts ANY residential district the side setback becomes a minimum of 100 ft and the rear setback a minimum of 150 ft — three to five times the base figures — except that parking may come within 50 ft of either line, and Planning-Board-determined screening is required in all cases. That abutment rule, not the base yard, is what governs most real C-1 sites. GREEN SPACE, NOT COVERAGE: the 25% figure — the lowest green-space requirement in the Town — is a minimum landscaped area, not a maximum building coverage.) | 0.92 ac | 50 / 30 / 50 ft | 35 ft | No |
| Business/Light Industrial District (base standards for the lighter uses: 40,000 sf minimum lot, 200 ft frontage, 35% minimum green space, 35 ft height, 45 ft front, 30 ft side, 50 ft rear. Rear yards of 100 ft apply to the more intensive retail and service uses (drive-throughs, restaurants, retail/wholesale, service stations, automotive repair, taxi dispatch, laundromats, indoor-outdoor recreation, day-care). Special permit uses: adult uses 80,000 sf under § 129-176U, public utilities 80,000 sf, self-service storage 40,000 sf, telecommunication towers under § 129-176L. Nonretail laundry and dry-cleaning facilities are listed at 80,000 sf / 200 ft with every other dimensional cell left blank in the schedule. HEIGHT note 2: 35 ft occupied, up to 55 ft with 20 ft of unoccupied space. RESIDENTIAL USES ARE SPECIFICALLY PROHIBITED in this zone. BUFFER RULE (note 1): where a C-2 use abuts any residential district the side setback becomes a minimum of 100 ft and the rear setback a minimum of 150 ft, except that parking may be within 50 ft of either line, with Planning-Board-determined screening required in all cases. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space, not a building-coverage cap.) | 0.92 ac | 45 / 30 / 50 ft | 35 ft | No |
| Commercial/Light Industrial District — closely parallel to C-2 but with its own use list and a slightly different intensity ladder (base: 40,000 sf minimum lot, 200 ft frontage, 35% minimum green space, 35 ft height, 45 ft front, 30 ft side, 50 ft rear for banks and convenience stores, 100 ft rear for business offices, bowling, drive-throughs, funeral parlors, restaurants, retail and wholesale businesses, service stations, automotive repair, taxi dispatch, veterinary hospitals, laundromats and indoor-outdoor recreation. Pet cemeteries are listed at 120,000 sf / 200 ft with the green space and height cells left blank. Special permit uses: public utilities 80,000 sf, self-service storage facilities 40,000 sf. HEIGHT note 2: 35 ft occupied, up to 55 ft with 20 ft of unoccupied space. RESIDENTIAL USES ARE SPECIFICALLY PROHIBITED in this zone. BUFFER RULE (note 1): where a C-3 use abuts any residential district the side setback becomes a minimum of 100 ft and the rear setback a minimum of 150 ft, except that parking may be within 50 ft of either line, with Planning-Board-determined screening required in all cases. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space, not a building-coverage cap.) | 0.92 ac | 45 / 30 / 50 ft | 35 ft | No |
| Industrial District — Wilton's heaviest district and the one with the deepest front yard in the Town (most uses: 120,000 sf minimum lot, 250 ft frontage, 35% minimum green space, 35 ft height, 100 ft front, 50 ft side, 75 ft rear). Principal permitted uses are assembly plants, component manufacturers, heavy equipment sales, printing and publishing, research laboratories, transportation facilities, and warehousing and distribution facilities — the two warehousing entries carry a higher 45 ft height rather than 35 ft. Two uses take larger sites: COMPOSTING FACILITIES at 200,000 sf / 300 ft with 75 ft side and rear yards, and AUTOMOBILE WRECKING AND JUNKYARDS at 300,000 sf / 300 ft — the largest single-use lot minimum in the district, roughly seven acres. Special permit uses: public utilities 120,000 sf / 200 ft, and telecommunication towers under § 129-176L. HEIGHT note 1: 35 ft occupied, up to 55 ft with 20 ft of unoccupied space. RESIDENTIAL USE IS SPECIFICALLY PROHIBITED in this zone. BUFFER RULE (note 2): where an I-1 use abuts any residential district the side setback becomes a minimum of 100 ft and the rear setback a minimum of 150 ft — double the base figures — except that parking may be within 50 ft of either line, with Planning-Board-determined screening required in all cases. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space, not a building-coverage cap.) | 2.75 ac | 100 / 50 / 75 ft | 35 ft | No |
| Composting/Recycling/Transfer/C&D Processing Facility District — a narrow single-purpose district for solid-waste handling (construction and demolition debris processing facilities, recyclable handling and recovery facilities and transfer stations: 120,000 sf minimum lot, 250 ft frontage, 35 ft height, 100 ft front, 75 ft side, 75 ft rear; COMPOSTING FACILITIES take a larger 200,000 sf lot with 300 ft of frontage and the same yards). THIS IS THE ONE WILTON DISTRICT WITH A REAL COVERAGE CAP — every other district states only a minimum green space. The schedule column reads 'Minimum Facility Coverage' but it operates as a MAXIMUM: note 2 makes it explicit that multiple uses cannot exceed 10% cumulative area coverage. Note also that FACILITY COVERAGE is broader than building coverage — note 1 defines it to include all buildings, outside product storage areas, and outside areas used for processing of materials, excluding composting and clean wood processing. The recorded 10% is therefore a cap on total developed area, not on building footprint alone, and it is severe: a 120,000 sf site supports only about 12,000 sf of combined building, storage and processing area. Every use in the district requires site plan review by the Planning Board and Part 360 compliance whether or not a building permit is needed. RESIDENTIAL USE IS SPECIFICALLY PROHIBITED. SEPARATION (note 3): a minimum distance of 100 ft is required between the CRT use or building and the nearest residential property line or residential district, except that parking may be within 50 ft; and where a CRT use abuts any residential district the side setback becomes a minimum of 100 ft and the rear a minimum of 150 ft, with adequate screening required.) | 2.75 ac | 100 / 75 / 75 ft | 35 ft | No |
| Commercial-Residential One District — a genuinely mixed district where houses and highway commercial sit side by side (one-family dwelling: min lot 20,000 sf with municipal water AND sewer, 30,000 sf with water OR sewer, 40,000 sf with neither; frontage 100 ft on full utilities, 150 ft otherwise; 35% minimum green space; 35 ft height; 45 ft front, 20 ft side on full utilities / 25 ft otherwise. CORNER LOTS: minimum lot size 30,000 sf and 150 ft of frontage on each road. REAR YARD ANOMALY — READ BEFORE DESIGNING: Schedule N prints the rear yard for the full-utility one-family row as '0', while the water-or-sewer and no-utility rows both print 50 ft and every other residential row in the district prints 50 ft. A zero rear yard in a district that permits dwellings is almost certainly a publishing error rather than policy, so rearSetback is recorded as NULL rather than as either 0 or an assumed 50 — do not design to a zero rear yard and do not assume 50 ft either; get it in writing from the Building Department at (518) 587-1939. A TWO-FAMILY DWELLING WITH ACCESSORY APARTMENT is a PRINCIPAL PERMITTED use at 40,000 sf / 200 ft with 45 ft front, 25 ft side and 50 ft rear. Commercial uses generally take 40,000 sf / 200 ft with 45 ft front, 30 ft side and 100 ft rear — restaurants (sit-down only), funeral parlors, convenience stores, business offices, banks, nursery and garden centers, retail businesses, indoor and outdoor recreation, boardinghouses and tourist homes and bed-and-breakfast facilities, laundromats and retail dry cleaning, veterinary hospitals and pet cemeteries, day-care centers and drive-through establishments. Larger: motels and hotels, federal/state/local offices, public libraries, clubs and lodges, and places of worship at 120,000 sf; hospitals and health services at 200,000 sf / 300 ft with 100 ft side. Special permit uses: public utilities and senior living communities at 120,000 sf / 300 ft (senior living at 45 ft height with Town Board approval), gas and service stations and automobile repair at 40,000 sf, automobile sales at 120,000 sf, kennels at 40,000 sf, and temporary mobile homes under § 129-176Q. HEIGHT note 1: 35 ft occupied, up to 55 ft with 20 ft of unoccupied space. BUFFER RULES (notes 2 and 3): where COMMERCIAL uses in CR-1 abut any residential district the side setback becomes a minimum of 100 ft and the rear a minimum of 150 ft, except parking within 50 ft; and 100 ft is required where directly abutting a side or rear residential property line in a residential district. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space; motels and hotels have that cell left blank entirely.) | 0.46 ac | 45 / 20 / - ft | 35 ft | As of right |
| Commercial-Residential Two District — the larger-lot sibling of CR-1, with roughly double the residential lot minimums (one-family dwelling: min lot 40,000 sf with municipal water AND sewer, 60,000 sf with water OR sewer, 80,000 sf with neither; frontage 200 ft on full utilities, 250 ft otherwise; 35% minimum green space; 35 ft height; 30 ft front — the shallowest front yard of any Wilton district outside H-1 — 35 ft side on full utilities / 40 ft otherwise, 50 ft rear. CORNER LOTS: minimum lot size 30,000 sf and 150 ft of frontage on each road, which is the unusual case of a corner lot being allowed SMALLER than the base 40,000 sf rather than larger. A TWO-FAMILY DWELLING WITH ACCESSORY APARTMENT is a PRINCIPAL PERMITTED use at 60,000 sf / 250 ft with municipal water and sewer; a plain two-family needs 90,000 sf / 250 ft with one utility or 120,000 sf / 250 ft with none. Commercial uses permitted by right: small retail businesses under 10,000 gross square feet across all buildings and business offices at 40,000 sf / 200 ft, clubs and lodges and community buildings at 60,000 sf / 200 ft, and day-care centers at 40,000 sf / 200 ft with 50 ft side and 100 ft rear. Special permit uses: places of worship, parish houses and rectories at 120,000 sf; senior living communities at 120,000 sf / 300 ft with a 45 ft height and Town Board approval; veterinary offices and restaurants at 40,000 sf; public utilities at 120,000 sf. Home occupations follow § 129-176C. HEIGHT note 1: 35 ft occupied, up to 55 ft with 20 ft of unoccupied space. BUFFER RULES (notes 2 and 3): where COMMERCIAL uses in CR-2 abut any residential district the side setback becomes a minimum of 100 ft and the rear a minimum of 150 ft, except parking within 50 ft; and 100 ft is required where directly abutting a side or rear residential property line in a residential district. GREEN SPACE, NOT COVERAGE: the 35% figure is minimum green space, not a building-coverage cap.) | 0.92 ac | 30 / 35 / 50 ft | 35 ft | As of right |
| Planned Unit Development District — a FLOATING district established case by case by the Town Board, not a mapped district you can look up on the zoning map (§ 129-115). The recorded minLotSize is the QUALIFYING SITE AREA, not a per-lot minimum: a PUD site shall be not less than 10 ACRES for a residential development, 3 ACRES for a commercial development, or 5 ACRES for an industrial development. Smaller sites will be considered where the applicant can demonstrate that the characteristics of the holdings meet the objectives of the article, but establishing a PUD on less acreage requires the affirmative vote of not less than 4/5 of the Town Board. THRESHOLD RESTRICTION: projects consisting only of single-family detached dwelling units do NOT meet PUD criteria — the mechanism is meant for entirely new residential, commercial or industrial subdivisions, parks or estates where economies of scale or creative architectural and planning concepts can be used, and a conventional detached-house subdivision must go through ordinary subdivision review instead. Yards, height and coverage are set project by project through the PUD approval and the Model PUD Local Law (Chapter 129 Attachment 2, Schedule 1), so those fields are null by design rather than missing — there are no district-wide figures to record. The proposed development must conform to the Town's most recent Comprehensive Plan.) | 10 ac | — | — | — |
ADUs vs. short-term rentals in Wilton
Short-term rentals allowed with local rules for Town of Wilton. Wilton has NO short-term-rental law — there is no STR chapter among the 34 chapters of the Town Code, and the phrase 'short-term rental' appears nowhere in Chapter 129, including its definitions at § 129-4 and the supplementary use standards at § 129-176. But that absence does NOT mean short-term renting is unregulated here, which is why this is recorded as regulated rather than unknown. Chapter 129 defines a TOURIST HOME as 'a dwelling in which overnight accommodations are provided or offered for transient guests for compensation' — language that squarely captures whole-house and room short-term rental activity — and it defines a TRANSIENT RESIDENCE as hotels, motels, inns, tourist cabins and similar multiple dwellings intended to provide lodging for transients on a temporary basis. The tourist home is a listed, permit-gated use, not a free activity. It appears in the schedules only as part of the grouped entry 'boardinghouses/tourist homes/bed-and-breakfast facilities', and only in these districts: R-2 (special permit, 100,000 sf), R-3 (special permit, 120,000 sf), RB-1 (special permit, 80,000 sf), H-1 (permitted, 10,000 sf), C-1 (permitted, 40,000 sf) and CR-1 (permitted, 40,000 sf). THE CRITICAL POINT FOR MOST BUYERS: the tourist home does not appear at all in R-1, the Town's principal single-family residential district and the district covering most Wilton house lots — so on the face of the schedules there is no listed use in R-1 under which a dwelling may be let to transient guests for compensation. Because Wilton has no STR-specific ordinance, whether the Town actually applies the tourist-home definition to a modern short-term rental listing is an enforcement-practice question the code does not answer, and the answer materially changes the underwriting. Do not assume either way — call the Building Department at (518) 587-1939 and get the Town's position in writing before underwriting short-term rental income on a Wilton property. Separately, since 2025 New York State requires every short-term-rental host to register the unit with the State through the county registry, regardless of what the municipality allows. 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 minimum0.46–2.75 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNational Grid territory.
- Building dept(518) 587-1939
- Last reviewed2026-07-28
ADU FAQ — Wilton, NY
Are ADUs allowed in Wilton, NY?
Town of Wilton has 14 districts. 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. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Wilton?
It depends on the district: 3 of 14 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 Wilton?
Short-term rentals allowed with local rules for Town of Wilton. 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 Wilton
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $200k–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 Wilton, priced by size.
More on Wilton: Full zoning for new construction · ADU build cost · House build cost · All Saratoga County towns
ADU information for Town of Wilton is compiled from the municipal code (last reviewed 2026-07-28) 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) 587-1939 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.