Claverack · ADU cost
What it costs to build an ADU in Claverack, NY
An 800 sq ft accessory dwelling unit in Claverack runs roughly $195k–260k, or about $247–323/sq ft, and that per-square-foot figure sits deliberately above the $202–265/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 Claverack maps 9 districts that treat accessory units differently from one another, so read the table below as a starting point rather than a verdict.
ADU cost by size in Claverack
Standard finish, slab on grade, on a flat and clear part of the lot, general-contractor margin included. These are structure costs at Columbia County pricing, before the service and septic work a second dwelling can trigger.
| Size | Type | $ / sq ft | Estimated total |
|---|---|---|---|
| 400 sq ft | Studio | $327–$428 | $130k–170k |
| 600 sq ft | One bedroom | $273–$358 | $165k–215k |
| 800 sq ft | One bedroom, larger | $247–$323 | $195k–260k |
| 1,000 sq ft | Two bedroom | $231–$302 | $230k–300k |
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 ADU | If it scaled with floor area | Fixed per unit |
|---|---|---|---|
| Site work | $7–$11 | $7 | — |
| Foundation | $16–$23 | $16 | — |
| Framing | $25–$32 | $25 | — |
| Envelope - roof, siding, windows | $32–$41 | $32 | — |
| Plumbing | $27–$33 | $16 | 55% |
| Electrical | $18–$23 | $13 | 35% |
| HVAC | $23–$28 | $14 | 45% |
| Insulation | $7–$9 | $7 | — |
| Interior finishes | $32–$43 | $27 | 15% |
| Millwork & cabinetry | $18–$27 | $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 Claverack 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 |
|---|---|---|---|---|
| Rural Conservation | 5 ac | 80 / 50 / 50 ft | 35 ft | Special permit |
| Rural Residential | 2 ac | 50 / 20 / 40 ft | 35 ft | Special permit |
| Rural Agricultural | 5 ac | 50 / 20 / 40 ft | 35 ft | Special permit |
| Hamlet Residential | 1 ac | 30 / 10 / 30 ft | 35 ft | Special permit |
| Mobile Home Park | 12 ac | 300 / 15 / 50 ft | 20 ft | No |
| Highway Commercial | 1 ac | 70 / 20 / 50 ft | 35 ft | Special permit |
| Hamlet Business | 0.5 ac | 30 / 10 / 30 ft | 35 ft | Special permit |
| Hamlet Business 1 | 1 ac | 30 / 20 / 50 ft | 35 ft | Special permit |
| Commercial Industrial Park | 1 ac | 40 / 25 / 20 ft | 35 ft | Special permit |
Rural Conservation — THIS FIGURE IS A DENSITY, NOT A LOT MINIMUM. Table 2 heads the row "Minimum lot size or Density of Development as applicable" and prints "density" for RC, RR and RA. § 6.3.1 then allows LOT SIZE AVERAGING in those three districts: an individual lot may be as small as the minimum the Columbia County standards for water and waste treatment allow, provided overall parcel density stays within one dwelling per five acres in RC and RA and one per two acres in RR. The law states no numeric floor for such a lot, so none is recorded. On a corner lot the side yard abutting the side street is 80 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 200 ft, a separate requirement from the lot width above. Commercial or manufacturing building footprint 3,500 sq ft; multifamily structure of 3+ units 5,000 sq ft; institutional structure 10,000 sq ft. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Rural Residential, Rural Agricultural — THIS FIGURE IS A DENSITY, NOT A LOT MINIMUM. Table 2 heads the row "Minimum lot size or Density of Development as applicable" and prints "density" for RC, RR and RA. § 6.3.1 then allows LOT SIZE AVERAGING in those three districts: an individual lot may be as small as the minimum the Columbia County standards for water and waste treatment allow, provided overall parcel density stays within one dwelling per five acres in RC and RA and one per two acres in RR. The law states no numeric floor for such a lot, so none is recorded. On a corner lot the side yard abutting the side street is 25 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 150 ft, a separate requirement from the lot width above. Commercial or manufacturing building footprint 3,500 sq ft; institutional structure 10,000 sq ft. Table 2 prints N/A for a multifamily structure. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Hamlet Residential — HR halves to 0.5 acre with public sewage OR water, recorded as variants. On a corner lot the side yard abutting the side street is 20 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 80 ft, a separate requirement from the lot width above. Multifamily structure of 3+ units 5,000 sq ft; institutional structure 10,000 sq ft. Table 2 prints N/A for a commercial or manufacturing footprint. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Mobile Home Park — MHP is a Mobile Home Park DISTRICT with a 12-acre minimum lot, a 300 ft front setback and a 20 ft height limit — the most restrictive front yard and the lowest height in the town. On a corner lot the side yard abutting the side street is 25 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 300 ft, a separate requirement from the lot width above. Institutional structure 10,000 sq ft. Table 2 prints N/A for commercial, manufacturing and multifamily footprints, and N/A for lot coverage — MHP publishes no coverage limit. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Highway Commercial — On a corner lot the side yard abutting the side street is 70 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 100 ft, a separate requirement from the lot width above. Building footprint 20,000 sq ft for retail and 45,000 sq ft for non-retail; multifamily structure of 3+ units 2,500 sq ft; institutional structure 10,000 sq ft. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Hamlet Business — Table 2 prints HB as "0.5 acre min. lot size (.5 w/public sewage or water)" — the with-utility figure is the SAME 0.5 acre, so the parenthetical changes nothing and no variant is recorded. On a corner lot the side yard abutting the side street is 20 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 80 ft, a separate requirement from the lot width above. Commercial or manufacturing building footprint 6,000 sq ft; multifamily structure of 3+ units 5,000 sq ft; institutional structure 10,000 sq ft. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Hamlet Business 1 — On a corner lot the side yard abutting the side street is 40 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 100 ft, a separate requirement from the lot width above. Commercial or manufacturing building footprint 6,000 sq ft; multifamily structure of 3+ units 5,000 sq ft; institutional structure 10,000 sq ft. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Commercial Industrial Park — On a corner lot the side yard abutting the side street is 40 ft — a separate figure from the interior side yard above, and one with no field. Minimum lot FRONTAGE is 150 ft, a separate requirement from the lot width above. Commercial or manufacturing building footprint 100,000 sq ft — by far the largest in the town — and institutional structure 10,000 sq ft. The density Table 2 sets is the TOTAL development potential of a parcel: once used up through subdivision no further subdivision is allowed, and the Planning Board maintains an official parcel map and register of each parcel's remaining allotment (§ 6.3.2). DENSITY BONUS: § 6.4 lets an applicant for a residential subdivision, special exception or site plan earn up to 30% MORE dwelling units than Table 2 allows, for preserving 50%+ of a parcel as agricultural land, for moderately-priced housing or for traditional neighbourhood design. What qualifies is the kind of development, which is not a condition axis, so no bonused figure is recorded.
Size limits on record in Claverack
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 Claverack:
- Rural ConservationTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Rural ResidentialTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Rural AgriculturalTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Hamlet ResidentialTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Mobile Home ParkTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Highway CommercialTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Hamlet BusinessTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Hamlet Business 1TWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
- Commercial Industrial ParkTWO ADJACENT ROWS NOT TO CONFUSE: A.10 Caretaker/Owner Dwelling is a separate use, SE only in RC, RR and RA, up to 1,600 sq ft and also rentable
Costs an ADU adds that a house does not
- Septic and water A second dwelling adds bedrooms to the design flow, which on an unsewered parcel often means expanding or replacing the existing system rather than tapping it. This is the single most common reason an ADU budget moves after design, and it is site-specific enough that no model should quote it - get it evaluated early.
- Utility service Central Hudson territory. A detached unit needs power run to it, and whether it goes on its own meter or subfeeds the main house changes both the cost and the permit path.
- Access and parking Many codes require an added parking space for the accessory unit, and a detached unit usually needs a driveway extension or a path, both of which count against a lot-coverage or impervious-surface cap.
- Short-term rentalsNo local short-term-rental law on record - which is not the same as permission. No local STR ordinance found as of Jun 2026. Columbia County occupancy tax applies. Separate question from whether you can build the unit.
- Zoning codewww.claverackny.gov/DocumentCenter/View/455/Town-of-Claverack-Zoning-Law-Local-Law-3-of-2015-PDF
- Building dept(518) 672-4471
Sizing up a specific parcel in Claverack?
Aldo pulls the exact zoning district, setbacks, and build feasibility for any parcel — before you buy. Enter your email to open Aldo and run your free report.
Building a full house instead?
A standard-finish house in Claverack runs $202–265/sq ft, about $365k–475k at 1,800 sq ft , plus roughly $16,346 for a conforming lot. See what it costs to build a house in Claverack.
ADU cost in nearby towns
All Columbia County towns: Hudson (City) · Ancram · Austerlitz · Canaan · Chatham · Clermont · Copake · Gallatin · Germantown · Ghent · Hillsdale · Kinderhook · Livingston · New Lebanon · Stockport · Stuyvesant · Taghkanic · Chatham (Village) · Kinderhook (Village) · Philmont (Village) · Valatie (Village)
More on Claverack: Can you build an ADU here? · Zoning for new construction · Columbia County build cost
ADU cost in Claverack: common questions
How much does it cost to build an ADU in Claverack, NY?
An 800 sq ft accessory dwelling unit in Town of Claverack runs roughly $195k–260k at a standard finish, general-contractor margin included. A 400 sq ft studio runs about $130k–170k. 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 Claverack?
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 $247–323/sq ft against $202–265/sq ft for a full house, even though it is the same trades doing the same work.
Are ADUs allowed in Claverack?
Town of Claverack has 9 districts. 8 districts allow ADUs with a special-use permit, 1 does not. Check the specific address with the free ADU checker or confirm with the building department at (518) 672-4471 before you spend money on design.
Can I rent an ADU in Claverack short term?
No local short-term-rental law on record - which is not the same as permission for Town of Claverack. 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 Columbia 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 Claverack vary by district and often carry exceptions this page does not show; zoning last reviewed 2026-08-16; verify with the building department at (518) 672-4471 before relying on any answer. Sources: Offsite / Aldo cost engine (costEngine.js + constants.js); zoning dataset (municipalData.js).