Bloomingburg · ADU cost
What it costs to build an ADU in Bloomingburg, NY
An 800 sq ft accessory dwelling unit in Bloomingburg runs roughly $190k–250k, or about $238–312/sq ft, and that per-square-foot figure sits deliberately above the $195–256/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 village 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 Village of Bloomingburg maps 4 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 Bloomingburg
Standard finish, slab on grade, on a flat and clear part of the lot, general-contractor margin included. These are structure costs at Sullivan County pricing, before the service and septic work a second dwelling can trigger.
| Size | Type | $ / sq ft | Estimated total |
|---|---|---|---|
| 400 sq ft | Studio | $316–$414 | $125k–165k |
| 600 sq ft | One bedroom | $264–$346 | $160k–210k |
| 800 sq ft | One bedroom, larger | $238–$312 | $190k–250k |
| 1,000 sq ft | Two bedroom | $223–$292 | $225k–290k |
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–$10 | $7 | — |
| Foundation | $16–$22 | $16 | — |
| Framing | $24–$30 | $24 | — |
| Envelope - roof, siding, windows | $30–$39 | $30 | — |
| Plumbing | $26–$32 | $16 | 55% |
| Electrical | $18–$23 | $12 | 35% |
| HVAC | $22–$27 | $14 | 45% |
| Insulation | $7–$9 | $7 | — |
| Interior finishes | $31–$41 | $26 | 15% |
| Millwork & cabinetry | $18–$26 | $10 | 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 Bloomingburg 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 |
|---|---|---|---|---|
| Single Family Residential District | 0.5 ac | 30 / 15 / 30 ft | 35 ft | As of right |
| Neighborhood Business District | 0.5 ac | 15 / 15 / 30 ft | 35 ft | As of right |
| Planned Unit Development Residential | 5 ac | - / 15 / 15 ft | 35 ft | Special permit |
| Planned Unit Development Commercial | 3 ac | - / 15 / 15 ft | 35 ft | No |
Single Family Residential District - A home in the R-1 District needs 0.5 acre on a lot 80 feet wide and 100 feet deep where there is a private well and a public sewer system, set back 30 feet at the front, 15 feet at each side and 30 feet at the rear, no taller than 35 feet and covering no more than 20% of the lot.
- Where there are no public utilities, or only public water, the minimum lot area is 0.75 acre on a lot 100 feet wide and 120 feet deep.
- A one-family or two-family dwelling has a habitable floor area of at least 900 square feet per dwelling unit, and an efficiency apartment at least 500 square feet.
- A manufactured housing park is a special use in any district on at least 3 acres, with 8,000 square feet per home site and every home 50 feet from a street right-of-way line or property line.
- A permitted accessory building may stand in a required side or rear yard if it is no taller than 15 feet, 15 feet from any lot line and 10 feet from the main building.
- A corner lot takes a front yard on both street frontages, and one of the remaining yards counts as the rear yard and the other as the side yard.
- An on-site sewage disposal system stands at least 100 feet from the high water line of any water body, measured from the water rather than from a lot line.
Neighborhood Business District - A building in the NBD District needs 0.5 acre on a lot 80 feet wide and 100 feet deep, set back at least 15 feet and no more than 20 feet at the front, 15 feet at each side and 30 feet at the rear, no taller than 35 feet and covering no more than 35% of the lot.
- The 20 foot front figure is a maximum front yard, a limit on how far back a building may stand, and not a setback it has to meet.
- No use is permitted by right here, so every use needs site plan approval.
- A one-family or two-family dwelling has a habitable floor area of at least 900 square feet per dwelling unit, and an efficiency apartment at least 500 square feet.
- A manufactured housing park is a special use in any district on at least 3 acres, with 8,000 square feet per home site and every home 50 feet from a street right-of-way line or property line.
- A permitted accessory building may stand in a required side or rear yard if it is no taller than 15 feet, 15 feet from any lot line and 10 feet from the main building.
- A corner lot takes a front yard on both street frontages, and one of the remaining yards counts as the rear yard and the other as the side yard.
Planned Unit Development Residential - A planned unit development in the PUDR District needs 5 contiguous acres on a site 300 feet wide and 300 feet deep, no taller than 35 feet and covering no more than 20% of the lot, with vegetated buffers 15 feet wide at the side and rear.
- No front yard figure is published here, and the front yard setback follows the underlying district instead.
- The side and rear figures are vegetated buffers 15 feet wide around the side and rear property lines of the entire development.
- Setbacks for individual buildings are detailed in the site plan and approved during site plan review.
- The district floats and can be located in the R-1 or NBD districts, and it is approved only by resolution of the Village Board.
- Not less than 30% of the gross area is common open space in perpetuity, and all uses are served by central water and sewer systems.
- The base number of dwelling units comes from the gross acreage and the dwelling units per acre of the underlying R-1 or NBD district, and a well designed site plan may exceed it.
Planned Unit Development Commercial - A planned unit development in the PUDC District needs 3 contiguous acres on a site 300 feet wide and 150 feet deep, no taller than 35 feet and covering no more than 35% of the lot, with vegetated buffers 15 feet wide at the side and rear.
- No front yard figure is published here.
- The side and rear figures are vegetated buffers 15 feet wide around the side and rear property lines of the entire development.
- Setbacks for individual buildings are detailed in the site plan and approved during site plan review.
- The district floats and applies to the Neighborhood Business District, replacing its use, area, bulk and density figures, and it is approved only by resolution of the Village Board.
- Common open space of not less than 10% of the tract is provided in perpetuity.
- A permitted accessory building may stand in a required side or rear yard if it is no taller than 15 feet, 15 feet from any lot line and 10 feet from the main building.
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 Orange & Rockland (O&R) 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. The Village of Bloomingburg has no local short-term rental law, and that is not the same as permission. A whole-house short-term rental is not a named use in the residential district, so confirm with the Village before counting on it. Separate question from whether you can build the unit.
- Zoning codeimg1.wsimg.com/blobby/go/684d2ff3-749d-4a61-ba69-b21dddda359a/downloads/Village%20Zoning%20Code.pdf
- Building dept(845) 733-1400
Sizing up a specific parcel in Bloomingburg?
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Building a full house instead?
A standard-finish house in Bloomingburg runs $195–256/sq ft, about $350k–460k at 1,800 sq ft , plus roughly $26,179 for a conforming lot. See what it costs to build a house in Bloomingburg.
ADU cost in nearby towns
All Sullivan County towns: Bethel · Callicoon · Cochecton · Delaware · Fallsburg · Forestburgh · Fremont · Highland · Liberty · Lumberland · Mamakating · Neversink · Rockland · Thompson · Tusten · Jeffersonville (Village) · Liberty (Village) · Monticello (Village) · Woodridge (Village)
More on Bloomingburg: Can you build an ADU here? · Zoning for new construction · Sullivan County build cost
ADU cost in Bloomingburg: common questions
How much does it cost to build an ADU in Bloomingburg, NY?
An 800 sq ft accessory dwelling unit in Village of Bloomingburg runs roughly $190k–250k at a standard finish, general-contractor margin included. A 400 sq ft studio runs about $125k–165k. 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 Bloomingburg?
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 $238–312/sq ft against $195–256/sq ft for a full house, even though it is the same trades doing the same work.
Are ADUs allowed in Bloomingburg?
Village of Bloomingburg has 4 districts. 2 districts allow ADUs, 1 does not, 1 requires a special-use permit. Check the specific address with the free ADU checker or confirm with the building department at (845) 733-1400 before you spend money on design.
Can I rent an ADU in Bloomingburg short term?
No local short-term-rental law on record - which is not the same as permission for Village of Bloomingburg. 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 Sullivan 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 Village of Bloomingburg vary by district and often carry exceptions this page does not show; zoning last reviewed 2026-10-07; verify with the building department at (845) 733-1400 before relying on any answer. Sources: the Offsite / Aldo cost engine and zoning dataset.