Cost to Build a House

Two price series

The number you want depends on who owns the land

Two federal numbers get quoted as the cost to build a house, and they are not the same number. The Census Bureau's Survey of Construction reports that the median new single-family house sold in 2025 went for $417,400, and that price includes the value of the improved lot¹. The same survey reports a median contract price of $404,000 for a contractor-built house started in 2025, and that series explicitly excludes the lot².

The first is a sales price. It is what a builder charged a buyer for a finished house standing on a finished lot, and it carries the builder's land, overhead, marketing and profit inside it. The second is closer to a construction cost: it is what a builder agreed to charge an owner who already had the ground. Neither one is a bid for your house on your site.

Census publishes size and per-square-foot figures as separate series. Median finished area of a single-family house completed in 2025 was 2,142 square feet³. Do not divide one number by the other. Census reports the 2025 median contract price per square foot as $171.57, and the median price per square foot of new houses sold as $154.79, both with the lot value taken out⁴⁵. Dividing the headline sales price by the median size produces a figure no source publishes.

Where the money goes inside a builder's price

The only published breakdown of a builder's own costs is NAHB's 2024 Construction Cost Survey, which rests on 41 usable responses from a sample of 4,000 builders emailed, is national only, and which NAHB itself warns should not be compared across years⁶.

Site work, $32,719

The average site work line in the NAHB survey is $32,719, and most of it is paperwork and connections rather than dirt. Building permit fees average $7,640, impact fees $6,367, water and sewer fees and inspections $6,260, and architecture and engineering $6,480⁶. All of these are averages across 41 builders, nationally.

Foundations, $44,748

Foundations average $44,748. Nearly all of it, $43,002, sits in a single line covering excavation, the foundation itself, concrete, retaining walls and backfill⁶. This is the stage most exposed to your particular lot. Rock, slope, a high water table and poor soil all land here, and none of that is inside a national average.

Framing, $70,982

Framing averages $70,982. Framing including the roof accounts for $49,763 of that, and trusses another $12,903⁶. Framing is where floor area converts into money most directly, so a plan change that adds square footage or roof complexity shows up in this line before it shows up anywhere else in the budget.

Exterior finishes, $57,510

Exterior finishes average $57,510: exterior wall finish $24,450, roofing $16,732, and windows and doors including the garage door $15,990⁶. Cladding and window packages are among the easiest lines to substitute downward without changing the drawings, which is why the written specification matters more than the elevation.

Major systems rough-ins, $82,319

Rough-ins average $82,319, split close to evenly: plumbing excluding fixtures $27,180, electrical excluding fixtures $27,383, and HVAC $26,938⁶. Read the exclusions. Fixtures and lighting are counted later under interior finishes, which is why a rough-in price and a finish allowance have to be read together rather than separately.

Interior finishes, $103,391

Interior finishes are the largest stage at $103,391. Cabinets and countertops average $19,056, flooring $15,388, drywall $13,962, interior trims and doors and mirrors $12,920, painting $11,150, plumbing fixtures $7,922, appliances $7,499 and lighting $5,392⁶. This is the stage your selections move, and the stage allowances are written against.

Median new house sold, 2025$417,400, lot included

Median contract price, 2025$404,000, lot excluded

What does it cost?

There is no national figure for what your house will cost, and no authoritative source publishes a cost to build per square foot for a state or a metro. Census publishes national and four-region figures only, and NAHB states that its own sample is not large enough for a geographic breakdown⁶. What does exist is this. The 2025 median sales price of a new single-family house was $417,400 and the average $523,800, both including the improved lot¹. The 2025 median contract price for a house built on an owner's land was $404,000 and the average $576,500, both excluding the lot².

Per square foot, Census reports a 2025 median contract price of $171.57 and a median of $154.79 for houses sold, both with the lot value removed⁴⁵. The contract series has moved from $124.95 in 2020 to $171.57 in 2025⁴. Regional spread is wide: 2025 median sales prices ran $750,800 in the Northeast, $541,900 in the West, $387,400 in the Midwest and $372,800 in the South¹. Separately, NAHB estimates that federal, state and local regulation adds $131,734 to a new single-family home, which it puts at 26.4 percent of an average sales price of $499,500 as of January 2026⁷.

Figures come from the Census Bureau Survey of Construction for 2025 and from two NAHB studies; the Census sales price includes the improved lot while every per-square-foot series excludes it, and none of these numbers is a bid for a specific house on a specific site.

Hiring

How to hire when you are still pricing the build

1

Who does the work

Three arrangements produce three different prices. A production builder sells you a finished house on its own lot, which is the $417,400 median¹. A contractor builds on land you already own, which is the $404,000 contract median². A general contractor working cost-plus bills you the trades plus a fee. Census counted 97 percent of 2025 completions as site-built and about 1 percent as modular⁸.

2

What pros will ask

Expect questions before you get a number: finished square footage, number of stories, garage bays, foundation type, and whether you already hold a survey, a soils report and confirmation of utility availability. Site work and foundations averaged $32,719 and $44,748 in the NAHB survey, and they are the two lines your specific lot moves most⁶. A builder who quotes before seeing the site is quoting a different house.

3

What to check before signing

Check that the price and the drawings describe the same house. Confirm in writing whether the lot is inside the number, because the two Census series differ on exactly that point². Get the allowance schedule in dollars for cabinets, flooring, plumbing fixtures, appliances and lighting, the lines that carry $19,056, $15,388, $7,922, $7,499 and $5,392 as national averages⁶. Confirm who pays permit and impact fees.

Cost questions, answered straight

What does it cost per square foot to build a house in my state?

No authoritative source publishes that. Census reports per-square-foot prices for the nation and for four regions only, and NAHB states that its survey sample is not large enough for a geographic breakdown⁴⁶. Every state-by-state table circulating online traces back to a lead aggregator or a contractor marketing page with no stated method. The published 2025 regional medians for contract price per square foot were $179.30 in the Northeast, $194.09 in the Midwest, $157.30 in the South and $176.87 in the West⁴.

Can I divide the median price by the median size?

No. The $417,400 median sales price includes the improved lot, and every Census per-square-foot series states that it excludes the lot¹⁵. Dividing $417,400 by the 2,142 square foot median finished area mixes a land-inclusive price with a land-exclusive measure. It also mixes two populations, since houses completed and houses sold are reported separately: the median size of a new single-family home sold in 2025 was 2,194 square feet³. Use the published per-square-foot series instead.

Is it cheaper to build on my own land?

The two published medians sit close together, and they are not directly comparable. Census puts the 2025 median contract price at $404,000 excluding the lot, and the median sales price at $417,400 including it¹². Add what your land cost to the first number and the comparison shifts. Building on your own land also tends to leave site work, permits, utility connections and impact fees with you unless the contract says otherwise, lines that averaged $7,640, $6,367 and $6,260 in the NAHB survey⁶.

How much of the price is builder profit?

NAHB's 2024 survey puts builder profit at 11.0 percent of the sale price, construction cost at 64.4 percent and the finished lot at 13.7 percent⁶. In dollars, on that survey's average house, profit was $72,971 against a $665,298 sale price, alongside $38,248 of overhead and general expenses, $18,955 of sales commission and $5,633 of marketing⁶. Read all of that with the sample in view: 41 usable responses out of 4,000 builders emailed, national only, and NAHB advises against comparing years.

Are new home prices moving right now?

The monthly series is softer than the annual one. Census and HUD put the median sales price of new houses sold in June 2026 at $398,300 and the average at $475,400⁹. Inventory stood at 9.3 months of supply, against 9.0 a year earlier⁹. NAHB's builder confidence index read 34 in July 2026, and 37 percent of builders reported cutting prices that month by an average of 6 percent¹⁰. That last figure is a trade association's own monthly survey of its members.

Sources

Where these facts came from

Every figure on this page was read out of the page linked below. We do not cite cost aggregators.

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