ADU · Saratoga County
Can you build an ADU in Mechanicville, NY?
City of Mechanicville has 6 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Mechanicville 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 District (the City's general residential district and the smallest residential lot standard in Saratoga County: A 4,000 SQ FT MINIMUM LOT — under a tenth of an acre — with a 45 FT lot width and a 100 ft lot depth, a 25 ft front yard, a 20 ft rear yard, THREE STORIES AND 40 FT of height, and 40% maximum coverage by principal AND accessory buildings together. TWO-FAMILY DWELLINGS ARE A PRINCIPAL PERMITTED USE HERE, and a MULTIPLE DWELLING is available by special use permit — so this ordinary residential district reaches multi-family without a rezoning. A MOBILE HOME is also a special use, and § 200-6 provides that a mobile home lot has the same requirements as any residential building lot. THE CITY'S LOT STANDARDS ARE THE SMALLEST IN SARATOGA COUNTY BY A LARGE MARGIN — this is a dense pre-war mill city on the Hudson, not a village or a town, and its 1962 ordinance is written for a platted street grid rather than for subdivision. No accessory apartment or accessory dwelling unit provision exists anywhere in Chapter 200.) | 0.09 ac | 25 / 5 / 20 ft | 40 ft | No |
| Multifamily/Townhouse Residential District (adopted 07-1990 and THE CITY'S PURPOSE-BUILT DENSITY DISTRICT: a 4,000 SQ FT minimum lot for a single-family home and 5,000 SQ FT for every other residential structure, with a 20 ft front yard, a 15 ft rear yard and the same paired side-yard rule as the Residential District — not less than 5 ft on either side, with the SUM OF THE TWO AT LEAST 14 FT. Permitted accessory uses are narrow: private garage or parking space, garden house, or tool shed. No accessory apartment provision exists in Chapter 200.) | 0.09 ac | 20 / 5 / 15 ft | — | No |
| General Commercial District (the City's main commercial district, and dimensionally the most permissive: NO MINIMUM LOT AREA AND NO MINIMUM LOT DIMENSIONS AT ALL — recorded as 0 because the code says 'none', not because the figure is unknown — with NO FRONT YARD REQUIREMENT, a 15 ft rear yard, a 5 ft side yard, three stories and 45 ft of height, and AN 85% MAXIMUM COVERAGE by principal and accessory buildings. THE USE LIST IS EXCEPTIONALLY BROAD AND INCLUDES HOUSING: a ONE-FAMILY DWELLING is a principal permitted use alongside retail, offices, banks, eating and drinking establishments, personal service, gasoline stations, automotive sales and service, funeral homes, commercial recreation, membership clubs and MOTELS OR HOTELS; two-family dwellings and MULTIPLE DWELLINGS are available by special use permit. With no lot minimum and 2,500 sq ft per unit, the arithmetic in this district is governed entirely by the per-unit rule, the 85% coverage and § 200-30 parking. No accessory apartment provision exists in Chapter 200.) | — | 0 / 5 / 15 ft | 45 ft | No |
| Restricted Commercial District (an auto-oriented and lodging district: NO MINIMUM LOT AREA AND NO MINIMUM LOT DIMENSIONS (recorded as 0 because the code says 'none'), a 10 FT FRONT SETBACK stated expressly 'to provide for access drives and off-street parking', NO REAR YARD, a 5 ft side yard, three stories and 45 ft of height. BOTH THE REAR AND SIDE YARDS RISE TO 10 FT WHERE THE YARD ABUTS A RESIDENCE DISTRICT, so a zero rear yard is available only mid-block. NO NEW DWELLING USE IS PERMITTED except as expressly provided; a multiple dwelling is available by special use permit at 2,500 sq ft of lot per unit. No accessory apartment provision exists in Chapter 200.) | — | 10 / 5 / 0 ft | 45 ft | No |
| Light Industrial District (a 5,000 SQ FT minimum lot with a 50 ft width and 100 ft depth, three stories and 45 ft of height, and a 50% maximum coverage. Permitted uses are industrial and manufacturing including construction, assembly, packaging and warehousing, all railroad uses, truck terminals and warehousing, PLUS every use permitted in a Commercial District OTHER THAN ANY DWELLING USE — so the district borrows the commercial use list wholesale and subtracts housing. NO NEW DWELLING USE IS PERMITTED, and no use may create objectionable effluent, odor, smoke, dust, fumes, light, noise or radiation in any residence district area. A junkyard requires a special use permit. THE CITY'S LOT STANDARDS ARE THE SMALLEST IN SARATOGA COUNTY BY A LARGE MARGIN — this is a dense pre-war mill city on the Hudson, not a village or a town, and its 1962 ordinance is written for a platted street grid rather than for subdivision. No accessory apartment provision exists in Chapter 200, and no residential use is available here in any case.) | 0.11 ac | 0 / 5 / 15 ft | 45 ft | No |
| Waterfront Mixed Use District (adopted 04-2009 for the Hudson riverfront and BY FAR THE MOST DEVELOPABLE ENVELOPE IN SARATOGA COUNTY: a 22,000 SQ FT minimum lot — about half an acre, and the largest lot the City asks for anywhere — but in exchange A 75 FT MAXIMUM BUILDING HEIGHT, ZERO FRONT YARD, ZERO SIDE YARD, a 15 ft rear yard, and A 90% MAXIMUM LOT COVERAGE. The use list is deliberately wide: one-family dwelling; MULTI-FAMILY, APARTMENT OR CONDOMINIUM; municipal building; professional and general office; RESIDENTIAL HOME BUSINESS; a long retail and commercial list running from restaurants and fast food through hotel, theatre, conference centre, drive-through retail, banks, grocery, drugstore, personal service, health club, day care, retail bakery, club or lodge, dry cleaner pick-up, laundromat, farmers market and outdoor retail or recreational events, with related accessories including pools, pavilions, storage and maintenance structures; and a PLANNED UNIT DEVELOPMENT as a permitted use in its own right. No accessory apartment provision exists in Chapter 200, but with multi-family permitted outright the ADU question does not arise here.) | 0.51 ac | 0 / 0 / 15 ft | 75 ft | No |
ADUs vs. short-term rentals in Mechanicville
No local short-term-rental law on record - which is not the same as permission for City of Mechanicville. NO SHORT-TERM-RENTAL PROVISION EXISTS IN THE CITY OF MECHANICVILLE ZONING ORDINANCE. A full-text read of the Code returns no 'short-term rental', no 'vacation rental' and no registration or licensing requirement — unsurprising for an ordinance whose base text dates to 1962. Recorded 'unknown' rather than 'prohibited': whole-house rental of a permitted dwelling is arguably the residential use itself, and absence of a found provision is NOT permission. The City's other transient uses are the HOTEL OR MOTEL, permitted in General Commercial and Restricted Commercial and again in Waterfront Mixed Use, where 'Hotel' appears in the retail and commercial list. Separately, New York State has required every short-term-rental host to register the unit with the State through the county registry since 2025 regardless of what the municipality allows, and Saratoga County HAS adopted a county-level short-term-rental programme: a 3% occupancy tax and a MANDATORY county registry, covering any room or space in a dwelling let for under 30 consecutive days. Registration runs two years, an unregistered host faces fines of up to $500, and the booking platform is separately liable for processing an unregistered listing — so Airbnb and Vrbo will delist. The City of Saratoga Springs runs its own registry alongside it. 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 minimum0.09 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNational Grid territory.
- Building dept(518) 664-9884
- Last reviewed2026-08-02
ADU FAQ — Mechanicville, NY
Are ADUs allowed in Mechanicville, NY?
City of Mechanicville has 6 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (518) 664-9884.
Do I need a special permit for an ADU in Mechanicville?
No. No district in City of Mechanicville permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (518) 664-9884 before ruling it out.
Can I use an ADU as a short-term rental in Mechanicville?
No local short-term-rental law on record - which is not the same as permission for City of Mechanicville. 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 Mechanicville
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 Mechanicville, priced by size.
More on Mechanicville: Full zoning for new construction · ADU build cost · House build cost · All Saratoga County towns
ADU information for City of Mechanicville is compiled from the municipal code (last reviewed 2026-08-02) 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) 664-9884 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.