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Moreau · ADU cost

What it costs to build an ADU in Moreau, NY

800 sq ft ≈ $200k–260k $249–327/sq ft 14 districts National Grid

An 800 sq ft accessory dwelling unit in Moreau runs roughly $200k–260k, or about $249–327/sq ft, and that per-square-foot figure sits deliberately above the $204–268/sq ft a full house costs here. An ADU still needs one whole kitchen, one whole bath, its own service panel and its own heating plant no matter how small you draw it, and those costs do not shrink with the floor plan, so they land on half the square footage and push the rate up. Whether the town will let you build one is a separate question from what it costs, and it gets answered parcel by parcel rather than townwide, since the Town of Moreau maps 14 districts that treat accessory units differently from one another, so read the table below as a starting point rather than a verdict.

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ADU cost by size in Moreau

Standard finish, slab on grade, on a flat and clear part of the lot, general-contractor margin included. These are structure costs at Saratoga County pricing, before the service and septic work a second dwelling can trigger.

SizeType$ / sq ftEstimated total
400 sq ft Studio $331–$433 $130k–175k
600 sq ft One bedroom $276–$362 $165k–215k
800 sq ft One bedroom, larger $249–$327 $200k–260k
1,000 sq ft Two bedroom $233–$305 $235k–305k

400 sq ft — One room plus a bath. Garage conversions and small backyard cottages land here.

600 sq ft — The most common detached build - a real bedroom, full kitchen, one bath.

800 sq ft — Room for a proper living area. Still a single bath and one kitchen.

1,000 sq ft — About as large as most codes allow an accessory unit to go.

Why the rate is higher than a house

The systems below are priced for an 800 sq ft unit. The middle column is what each system would cost if it simply shrank with the floor plan; the left column is what it actually costs once you account for the equipment a dwelling needs one of regardless of size. The gap between the two columns is the whole reason small builds price the way they do.

System$ / sq ft in an ADUIf it scaled with floor areaFixed per unit
Site work $7–$11 $7 —
Foundation $16–$23 $16 —
Framing $25–$32 $25 —
Envelope - roof, siding, windows $32–$41 $32 —
Plumbing $28–$34 $16 55%
Electrical $18–$24 $13 35%
HVAC $23–$28 $15 45%
Insulation $7–$9 $7 —
Interior finishes $32–$43 $27 15%
Millwork & cabinetry $18–$28 $11 55%

The fixed-per-unit share is a modeling assumption, not a figure from the code: it is our estimate of how much of each system's budget buys equipment a dwelling needs exactly one of - a kitchen rough-in, a bath group, a service panel, a heating plant - and therefore does not shrink when the unit does. Site work, foundation, framing, envelope and insulation are treated as scaling straight with floor area, which understates the premium slightly, because a small building carries more envelope per square foot of floor than a large one.

What the Moreau code says about accessory units

Whether you can build one, and how large, is decided by the district your parcel sits in rather than by the town as a whole. The table shows how each mapped district treats ADUs alongside the lot and setback standards a second unit still has to fit inside. District boundaries and conditions vary, so treat it as a starting point and confirm the district that applies to your parcel.

District Min lot Setbacks F / S / R Max height ADU
R-1 One-Family Residential 0.52 ac 30 / 12 / 30 ft 38 ft No
R-2 One- and Two-Family Residential 0.52 ac 40 / 15 / 30 ft 38 ft No
R-3 Agriculture, One- and Two-Family Residential 1.38 ac 40 / 20 / 30 ft 38 ft No
R-4 Agriculture, One- and Two-Family Residential 3 ac 40 / 20 / 30 ft 38 ft No
R-5 Agriculture, One- and Two-Family Residential 5 ac 40 / 20 / 30 ft 38 ft No
UR Multifamily, One- and Two-Family Residential 0.11 ac 30 / 12 / 30 ft 30 ft No
C-1 General Commercial 1 ac 50 / 15 / 30 ft 30 ft No
CC-1 Commercial and Communications 1 ac 50 / 15 / 30 ft 30 ft No
C-2 Neighborhood Commercial 0.52 ac 50 / 15 / 30 ft 30 ft No
C-3 Residential and Professional 0.52 ac 40 / 12 / 30 ft 38 ft No
M-1 General Manufacturing and Industrial 1.5 ac 30 / 25 / 30 ft 38 ft No
M-1A General Manufacturing and Industrial 1.5 ac 30 / 25 / 30 ft 38 ft No
M-2 General Manufacturing and Industrial 1.84 ac 30 / 25 / 30 ft 38 ft No
RP Resource Protection 10 ac 50 / 50 / 50 ft 38 ft No

R-1 One-Family Residential - The lot minimum is the same with public water and sewer as without public water, and a lot must meet the minimum depth as well as the area and width.

  • A place of worship needs at least 100,000 sq ft on a 300 by 300 ft lot, with up to 50 ft of height and an 80 ft front yard.
  • A public or private school needs at least 5 acres on a 400 by 300 ft lot at 20% coverage, with a 1,200 sq ft minimum floor area.

R-2 One- and Two-Family Residential - Without public water the lot minimum rises to 32,500 sq ft on 175 by 175 ft; the 22,500 sq ft on 125 by 125 ft applies with public water and sewer.

  • A two-family dwelling needs at least a full acre on a 175 by 175 ft lot, with at least 1,200 sq ft of floor area, and the acre applies whether or not the lot has public water.
  • A senior one-family dwelling takes a lot at least 75 ft wide and 200 ft deep, with a 30 ft front yard and a 10 ft side, and must be served by municipal water.
  • Each senior lot must be owned and occupied by at least one person aged 55 or over, may not be sold to anyone but a senior owner-occupier, and carries that restriction in its deed.
  • Special permit uses need site plan review by the Planning Board.
  • On a special permit, a club or lodge and a funeral home need at least 100,000 sq ft on a 300 by 300 lot at 10% coverage, and a golf or country club at least 50 acres.
  • A telecommunication tower is confined to town-owned property in part of R-2, where it may reach 120 feet.

R-3 Agriculture, One- and Two-Family Residential - Agriculture has its own standards: at least 5 acres on 250 by 250 ft, no coverage limit, 35 ft of height and 25 ft on all three yards. Customary farm structures and a farm pond are permitted accessory uses.

  • Special permit uses follow the R-1 and R-2 figures, except a day-care centre, which needs at least 60,000 sq ft on 200 by 175 ft at 25% coverage, a 1,200 sq ft floor area and 30 ft of height.

R-4 Agriculture, One- and Two-Family Residential - Most special permit uses need the same 3 acres as a house but a different lot shape, and every special use except a place of worship is held to 30 ft of height.

  • A club, lodge or funeral home needs a 300 by 300 ft lot at 10% coverage, and a funeral home a 2,000 sq ft minimum floor area.
  • A place of worship needs a 300 by 300 ft lot at 25% coverage and may reach 50 ft of height.
  • A golf or country club needs at least 50 acres on 400 ft of width at 2% coverage; a swim club needs at least 160,000 sq ft on 400 by 300 ft at 5%.

R-5 Agriculture, One- and Two-Family Residential - Customary farm structures, a farm pond and the sale of farm produce grown on the premises are permitted accessory uses. Agriculture takes the same lot as a dwelling but 25 ft on all three yards.

  • Special permit uses here follow R-4's standards, with some exceptions; confirm them with the Building Department.

UR Multifamily, One- and Two-Family Residential - Apartments, condominiums and townhouses need 5,000 sq ft of land per dwelling unit and public water and sewer, and every multifamily use needs site plan review by the Planning Board.

  • One- and two-family dwellings follow R-2: a one-family takes 22,500 sq ft on 125 by 125 at 25% coverage, with an 800 sq ft floor area, 38 ft of height and a 40 ft front, 15 ft side and 30 ft rear.
  • R-2's unserviced rung of 32,500 sq ft on 175 by 175 travels with that reference.
  • A duplex takes the R-2 two-family row: 1 acre on 175 by 175 with a 1,200 sq ft minimum floor area, 25% coverage, 38 ft of height and the same yards.
  • The 600 sq ft minimum floor area applies to each dwelling unit.

C-1 General Commercial - Every use in C-1 needs site plan review, and every commercial use takes the same lot, coverage, height and yard figures.

  • No minimum floor area applies to a commercial building here.

CC-1 Commercial and Communications - A telecommunication tower needs a Planning Board special use permit and may reach 120 feet at 60% coverage on at least one acre. Site plan review is required for every use here.

  • A tower must stand back from every abutting parcel and street line by 50% of its height, or 100% where the parcel abuts residentially zoned or used property (§ 149-50.1).
  • The tower's lot is the land those setbacks need or the district minimum, whichever is greater.
  • The uses allowed here, principal, accessory and by special permit, are the same as in C-1.
  • Both the 200 ft width and the 175 ft depth bind, so a lot may meet the area and the width and still fail on depth.

C-2 Neighborhood Commercial - The 22,500 sq ft minimum is stated for a lot with public water and public sewer, and where the lot adjoins an R district a 30 ft setback applies in place of the 15 ft side yard, with fencing and/or planting.

  • Ask the building department whether a lot without public water and sewer can be built on here at all.
  • A single-family dwelling, a laundromat, a fueling station and an apartment over a store each need a special permit, on the same standards as the rest of the district.
  • Site plan review is required for every use in C-2.
  • Both the 100 ft width and the 100 ft depth bind, so a lot may meet the area and the width and still fail on depth.

C-3 Residential and Professional - Despite the C prefix this is a residential district: the permitted principal uses are a single-family dwelling, a professional office and a customary home occupation, and there are no special-permit uses.

  • Public water and sewer do not change the 22,500 sq ft lot minimum.

M-1 General Manufacturing and Industrial - A 100 ft setback is required from any residential district or use, and every use needs site plan review.

  • Junkyards, tow yards and salvaging, and heavy equipment sales, need at least 80,000 sq ft; light manufacturing, tool and die, instrument manufacture and vehicle service need 65,340 sq ft.
  • Accessory structures over 144 sq ft must meet the principal building's setbacks, except single-family homes under § 149-5.

M-1A General Manufacturing and Industrial - A 100 ft setback is required from any residential district or use, and every use needs site plan review.

  • A water-dependent use needs at least 21,730 sq ft. Warehousing, public utility power generation and park and recreation facilities need at least 80,000 sq ft.
  • A single-family dwelling is a special permit use on R-2's figures: at least 22,500 sq ft with water or 32,500 without, with a 40 ft front, 15 ft side and 30 ft rear yard.
  • Accessory structures over 144 sq ft must meet the principal building's setbacks, except single-family homes under § 149-5.

M-2 General Manufacturing and Industrial - A 100 ft setback is required from any residential district or use, and every use needs site plan review.

  • Manufacturing, assembly or other industrial operation, agricultural packaging, processing and storage, and heavy equipment sales, rental and service each need at least 80,000 sq ft.
  • Tool and die and instrument manufacture need at least 63,540 sq ft, a figure that looks like a digit transposition; confirm it with the Building Department.
  • Accessory structures over 144 sq ft must meet the principal building's setbacks, except single-family homes under § 149-5.

RP Resource Protection - Hunting and fishing camps and cabins are a permitted principal use alongside the one-family dwelling, with a minimum floor area of 500 rather than 800 sq ft.

  • Agriculture, timber harvesting, dog kennels, riding stables and a professional office need at least 5 acres on a 250 by 250 ft lot, with no coverage limit and 30 ft of height.
  • Quarrying, mining and sand and gravel extraction are special permit uses on the same 5-acre standard.
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Size limits on record in Moreau

Where the code states a size cap, it decides which row of the cost table above actually applies to you. These are the caps recorded for Moreau:

Costs an ADU adds that a house does not

Sizing up a specific parcel in Moreau?

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Building a full house instead?

A standard-finish house in Moreau runs $204–268/sq ft, about $370k–480k at 1,800 sq ft , plus roughly $1,660 for a conforming lot. See what it costs to build a house in Moreau.

ADU cost in nearby towns

Mechanicville (City)
800 sq ft ≈ $200k–260k
Saratoga Springs (City)
800 sq ft ≈ $200k–260k
Ballston
800 sq ft ≈ $200k–260k
Charlton
800 sq ft ≈ $200k–260k
Clifton Park
800 sq ft ≈ $200k–260k
Corinth
800 sq ft ≈ $200k–260k

All Saratoga County towns: Mechanicville (City) · Saratoga Springs (City) · Ballston · Charlton · Clifton Park · Corinth · Day · Edinburg · Galway · Greenfield · Halfmoon · Malta · Milton · Northumberland · Providence · Saratoga · Stillwater · Waterford · Wilton · Ballston Spa (Village) · Corinth (Village) · Round Lake (Village) · Schuylerville (Village) · South Glens Falls (Village) · Stillwater (Village) · Victory (Village) · Waterford (Village)

More on Moreau: Can you build an ADU here? · Zoning for new construction · Saratoga County build cost

ADU cost in Moreau: common questions

How much does it cost to build an ADU in Moreau, NY?

An 800 sq ft accessory dwelling unit in Town of Moreau runs roughly $200k–260k at a standard finish, general-contractor margin included. A 400 sq ft studio runs about $130k–175k. Those are structure costs on an easy site and do not include the septic, water or electrical service work a second unit often triggers.

Why does an ADU cost more per square foot than a house in Moreau?

Because a lot of a dwelling's cost is per dwelling, not per square foot. One kitchen, one bath group, one service panel and one heating plant cost about the same in an 800 sq ft cottage as in a 1,800 sq ft house, so on the smaller unit they get spread over less than half the floor area. That is why an ADU here prices at $249–327/sq ft against $204–268/sq ft for a full house, even though it is the same trades doing the same work.

Are ADUs allowed in Moreau?

Town of Moreau has 14 districts. All districts prohibit ADUs. Check the specific address with the free ADU checker or confirm with the building department at (518) 792-1030 x5 before you spend money on design.

Can I rent an ADU in Moreau short term?

No local short-term-rental law on record - which is not the same as permission for Town of Moreau. ADU rules and short-term-rental rules are set separately, so a unit you are allowed to build is not automatically one you are allowed to rent nightly. Confirm both before you underwrite the build on short-term-rental income.

ADU costs are modeled estimates in current 2026 dollars at the Saratoga County regional index, general-contractor margin included, derived from Offsite's cost engine with a stated adjustment for the equipment a dwelling needs one of regardless of size. They are planning numbers for decision-support only - not a bid, quote, or guarantee, and not legal, architectural or engineering advice. They cover the structure and exclude septic expansion, utility service runs, site work beyond a flat and clear pad, and permit fees. ADU eligibility, size, owner-occupancy and permit conditions in the Town of Moreau vary by district and often carry exceptions this page does not show; zoning last reviewed 2026-07-31; verify with the building department at (518) 792-1030 x5 before relying on any answer. Sources: the Offsite / Aldo cost engine and zoning dataset.

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