Southeast · build cost
What it costs to build a house in Southeast, NY
A standard-finish house in Southeast runs about $222–291/sq ft all in, which on a 1,800 sq ft build works out to roughly $400k–525k with general-contractor margin already in it. The part people leave out is what you pay before that, because the smallest conforming residential lot in the Town of Southeast is 0.46 acres and vacant land here carries a median assessed value of $39,142 an acre, so the dirt alone is around $18,005 and the whole thing lands near $420k–540k. What the code will let you put on that lot is rarely the binding constraint, since even Residence (use group d: min lot width 90 ft; combined side yards 50 ft; required street frontage 90 ft; FAR 0.25). Inherits R-80's conditional uses; short-term rental is a conditional use here, the tightest residential district here, allows a building footprint of roughly 11,021 sq ft on a conforming lot, which is more house than the budget above actually buys. The figures below come out of the same cost engine Aldo uses to price a real parcel, broken out by system and by what a harder site adds, so you can see where the money actually goes.
Land plus build: the real number in Southeast
Build cost is the half everyone quotes. The other half is the lot, and in the Town of Southeast the code will not let you build on less than 0.46 acres in its most permissive residential district, so that is the smallest ticket into the town.
| Line | Amount |
|---|---|
| Minimum conforming residential lot (0.46 ac at $39,142/ac) | $18,005 |
| House, 1,800 sq ft, standard finish, slab on a flat lot | $400k–525k |
| Land and build together | $420k–540k |
Land is roughly 4% of that total in Southeast. The per-acre figure is the median assessed full market value of vacant residential land across 256 priced parcels here, which is a proxy for what dirt is worth and not an asking price - road-frontage lots that are ready to build on trade above it, and back land without access trades below.
Cost per square foot by finish level
All in, general-contractor margin included, for a slab-on-grade build on a flat and clear lot. The rate holds steady whether you build 1,200 or 2,500 sq ft, which is why the finish level moves a budget more than the size does.
| Finish level | $ / sq ft | 1,800 sq ft total |
|---|---|---|
| Standard | $222–$291 | $400k–525k |
| Custom | $296–$441 | $535k–795k |
| Luxury | $452–$780 | $815k–1.41M |
Standard — Builder-grade but solid - stock cabinetry, mid-range windows, standard fixtures. What most spec cabins and rental builds run.
Custom — Better envelope, upgraded windows and doors, semi-custom millwork and fixtures. The typical Hudson Valley owner-build.
Luxury — High-performance envelope, custom cabinetry, designer fixtures and specialty finishes. Architect-driven, no stock parts.
Where the money goes
A standard-finish build at Putnam County pricing, broken out by trade as dollars per square foot. Foundation and site work here are the slab and flat-lot baseline, so a harder site stacks on top of them.
| System | $ / sq ft |
|---|---|
| Site work | $8–$12 |
| Foundation | $18–$25 |
| Framing | $28–$35 |
| Envelope - roof, siding, windows | $35–$45 |
| Plumbing | $18–$22 |
| Electrical | $14–$18 |
| HVAC | $16–$20 |
| Insulation | $8–$10 |
| Interior finishes | $30–$40 |
| Millwork & cabinetry | $12–$18 |
What moves the number
The baseline assumes the easy case. Each of these stacks on top, per square foot, at Putnam County pricing:
- Crawlspace instead of slab+$14–21/sq ft
- Full basement instead of slab+$33–53/sq ft
- Moderately sloped or wooded lot+$9.5–18/sq ft
- Steep or ledge-rock site+$24–48/sq ft
- Winter foundation & site work+$3.1–4.4/sq ft
Whole-project totals
Standard finish, slab on a flat lot, all in and before land. A harder site or a higher finish moves these up.
| Home size | Estimated build cost | With a conforming lot |
|---|---|---|
| 1,200 sq ft | $265k–350k | $285k–365k |
| 1,800 sq ft | $400k–525k | $420k–540k |
| 2,500 sq ft | $555k–730k | $575k–745k |
How much house Southeast actually lets you build
Every residential district caps how much of the lot the building can cover. Multiply that cap by the district's minimum lot size and you get the largest footprint the code permits on a conforming lot in the Town of Southeast, which runs from about 11,021 sq ft in Residence (use group d: min lot width 90 ft; combined side yards 50 ft; required street frontage 90 ft; FAR 0.25). Inherits R-80's conditional uses; short-term rental is a conditional use here to 31,973 sq ft in Residence (use group p: min lot width 300 ft; combined side yards 200 ft; required street frontage 250 ft; FAR 0.20). Accessory apartments and short-term rentals are both listed uses here. Worth checking before you assume zoning is what is limiting the house, because in most districts it is the budget that runs out first.
| District | Min lot | Lot coverage | Max footprint | Max height |
|---|---|---|---|---|
| Residence (use group d: min lot width 90 ft; combined side yards 50 ft; required street frontage 90 ft; FAR 0.25). Inherits R-80's conditional uses; short-term rental is a conditional use here | 0.46 ac | 55% | 11,021 sq ft | 35 ft |
| Residence Multifamily (use group e: min lot width 90 ft; combined side yards 50 ft; required street frontage 90 ft; FAR 0.25. Multiple dwellings are permitted subject to § 138-23). Short-term rental is a conditional use here | 0.46 ac | 55% | 11,021 sq ft | 35 ft |
| Residence (use group c: min lot width 135 ft; combined side yards 70 ft; required street frontage 135 ft; FAR 0.20). Inherits R-80's conditional uses; short-term rental is a conditional use here | 0.92 ac | 40% | 16,030 sq ft | 35 ft |
| Residence (use group b: min lot width 175 ft; combined side yards 75 ft; required street frontage 175 ft; FAR 0.20). Inherits R-80's conditional uses; short-term rental is a conditional use here | 1.38 ac | 20% | 12,023 sq ft | 35 ft |
| Residence (use group a: min lot width 200 ft; combined side yards 100 ft; required street frontage 175 ft; FAR 0.20). NOTE: short-term rental is NOT listed for R-80, though accessory apartments are (as a conditional use) | 1.84 ac | 20% | 16,030 sq ft | 35 ft |
| Residence (use group p: min lot width 300 ft; combined side yards 200 ft; required street frontage 250 ft; FAR 0.20). Accessory apartments and short-term rentals are both listed uses here | 3.67 ac | 20% | 31,973 sq ft | 35 ft |
| Lake Tonetta Watershed (use group g: a low-intensity watershed-protection district — min lot area 10 acres, min lot width 400 ft, combined side yards 200 ft, and maximum lot coverage of just 3%. Single-family dwellings and accessory apartments are permitted by right; short-term rental is a conditional use) | 10 ac | 3% | 13,068 sq ft | 35 ft |
Footprint is the ground-floor building area, so a second storey buys floor area this number does not constrain, subject to the height limit. Some municipalities write their coverage cap as impervious surface rather than building coverage, which counts the driveway, walks and patio against the same budget and leaves less of it for the house - check which one your district uses before you design to it.
Local rules that move a build budget in Southeast
- UtilityNYSEG territory. Service run and connection cost depends on distance to the line, which on a rural parcel can be the single largest site expense.
- Short-term rentalsShort-term rentals allowed with local rules. Short-term rental is a defined and regulated use in the Town of Southeast. In the Table of General Use Requirements for the residential districts, 'short-term rental' is a CONDITIONAL use requiring Planning Board approval in R-160, R-60, R-40, R-20, RMF and LTW; it is notably NOT listed for R-80. Bed-and-breakfast and country inn are separate, distinct uses (e.g. bed-and-breakfast is by right in R-160 and appears across several commercial districts). Because STR requires case-by-case Planning Board approval rather than being either by-right or prohibited, it is recorded as regulated. 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.
- Districts mapped19 zoning districts in the Town of Southeast.
- Building dept(845) 279-2123
- Zoning last reviewed2026-07-23
Sizing up a specific parcel in Southeast?
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 an accessory unit instead?
An 800 sq ft ADU in Southeast runs about $215k–285k, and the per-square-foot rate is higher than a full house because the kitchen, bath, panel and heating plant cost the same either way. See what it costs to build an ADU in Southeast, priced by size.
Cost to build in nearby towns
All Putnam County towns: Carmel · Kent · Patterson · Philipstown · Putnam Valley · Brewster (Village) · Cold Spring (Village) · Nelsonville (Village)
More on Southeast: Zoning for new construction · ADU rules · Putnam County build cost
Cost to build in Southeast: common questions
How much does it cost to build a house in Southeast, NY?
A standard-finish new build in Town of Southeast runs about $222–291/sq ft all in, general-contractor margin included, which puts a 1,800 sq ft house at roughly $400k–525k. A full basement, a sloped or wooded site, or a winter foundation pour each add to that, and a custom or luxury finish level moves it up again. Land is on top: a minimum conforming lot of 0.46 acres runs about $18,005 here, for a combined $420k–540k.
What is the cheapest way to build in Southeast?
The three levers that move a budget most here are finish level, foundation and site. Standard finish on a slab, on a flat and already-cleared lot, in the warm season, is the floor - every step away from that combination is priced in the tables above. Square footage matters less than people expect, because the per-square-foot rate barely moves between a 1,200 and a 2,500 sq ft house; what changes is the total.
Do I need a bigger lot to build in Southeast?
The smallest residential minimum lot size in Town of Southeast is 0.46 acres, and the more rural districts go up to 10 acres. Which minimum applies depends on the district your parcel sits in, so confirm the district before you assume a lot is buildable.
Does it cost more to build in winter in Southeast?
Yes. Foundation and site work carry a winter premium because of frost protection, heating and ground conditions, and at Putnam County pricing that works out to about +$3.1–4.4/sq ft across the whole build. It is usually cheaper to wait for spring than to pay it, unless the schedule is already costing you more somewhere else.
Construction figures are modeled estimates from Offsite's cost engine in current 2026 dollars, general-contractor margin included, using the Putnam County regional index. They are planning numbers for decision-support only - not a bid, quote, or guarantee, and not architectural or engineering advice. Zoning figures for the Town of Southeast come from the municipal code (last reviewed 2026-07-23) and can carry district exceptions and overlays this page does not show. Actual cost depends on the specific parcel, design, site conditions and market at the time you build; verify with the building department at (845) 279-2123 and get a real estimate before you commit. Sources: Offsite / Aldo cost engine (costEngine.js + constants.js); zoning dataset (municipalData.js) ; NYS statewide tax-parcel layer, vacant residential full market value per acre.