Cost to Build a House Calculator

Enter the finished square feet, your state and the finish level, add a garage, basement and site work, and get the total cost to build, the cost per square foot, where the money goes, and how it compares with buying the median home in your state.

The calculator prices the house itself from a per-square-foot rate for your finish level, scaled by a state construction-cost index, then adds the pieces that are not “living area” — garage, basement, site work, permits and design — because that is where most “$150 a square foot” estimates go wrong. The result is the cost to build on a lot you already own; add the land. The build-vs-buy line compares it with the median existing home in your state, which is the honest test of whether building makes financial sense. For the cost of rebuilding an existing house after a loss (insurance replacement cost, which runs higher), use the rebuild cost calculator instead.

How much does it cost to build a house?

In 2026 a standard-finish house costs about $150 per square foot of living area to build nationally, so a 2,000 sq ft house is $300,000 for the house itself and about $370,240 with a two-car garage, permits and $25,000 of site work — before the land. A 1,500 sq ft house runs about $291,490 all-in. In Texas the same 2,000 sq ft house is $347,224; in California $600,400. Upgraded finishes push the rate to $190, custom homes to $250 and luxury builds to $340 or more per square foot.

For comparison, the National Association of Home Builders’ 2024 construction cost survey put the average builder’s construction cost at about $162 per square foot for a 2,647 sq ft house ($428,000), with the finished lot adding roughly $90,000 on top and the sale price averaging $665,000 once financing, overhead, marketing and profit were included. Our $150 standard rate is the construction cost for a simpler house; the all-in figure from the tool is what you would pay a builder on your own lot.

Cost to build a house by size

Cost does not scale in a straight line with square feet. Kitchens, bathrooms, the mechanical systems and the site cost roughly the same whether the house is 1,500 or 2,500 sq ft, so the all-in cost per square foot falls as the house grows: about $204 at 1,200 sq ft, $185 at 2,000 and $176 at 3,000 in the table below. The cheapest square feet in any house are plain bedroom and living space; the dearest are kitchens ($300–600 per sq ft of kitchen) and bathrooms. A second story is about 5% cheaper per square foot than the same area on one level because the foundation and roof are half the size.

Worked example: 1,500 sq ft in Texas

Texas’s index is 112 against the national 120, so the standard rate is $150 × 0.933 = $140 per sq ft. House: 1,500 × $140 = $210,000. Two-car garage: 480 sq ft × $56 = $26,880. Permits and plans at 5%: $11,844. Site work: $25,000. Total $273,724, or $182 per sq ft all-in — against a Texas median existing home of $261,000. Add a $60,000–$120,000 lot in a Texas suburb and building costs more than buying the typical house; it wins only on a cheap rural lot or when you want something the resale market does not offer.

Cost to build a house per square foot by state

Labor rates, code requirements and material freight move construction cost by more than a factor of two across the country. The cheapest states to build in are Alabama ($111), Arkansas ($113), Mississippi ($113), Oklahoma ($131); the dearest are Hawaii ($329), California ($250), New York ($249), Massachusetts ($238) per square foot at standard finish. The last two columns compare a complete 2,000 sq ft standard build (garage, 5% soft costs, $25,000 site work, no land) with the state’s 2026 median existing-home value: a negative number means new construction undercuts the resale market before land, which is true on the West Coast, across the Mountain West (Arizona, Colorado, Idaho, Montana, Nevada, Utah, Wyoming) and in the dearest Northeast markets (Massachusetts, New Jersey, D.C.), and false almost everywhere in the South and Midwest, where cheap existing housing undercuts new construction by 30–40%.

Within a state the spread is as wide again: building in Austin or Houston costs 10–20% more than in rural Texas, and a mountain or island lot in Colorado or Hawaii can add 30% for access and freight. Use the state figure as the midpoint and the tool’s range (−15% / +20%) as the realistic band for a bid.

Where the money goes

Builders report costs in eight stages, and the shares are remarkably stable from year to year. Interior finishes are the largest slice at about a quarter, framing and the major systems about 17% each, exterior finishes 14%, the foundation 11%, site work 7%. The table applies those shares to a $300,000 construction budget and to a 2,000 sq ft standard house at the national rate.

The practical use of the shares: they tell you what a change costs. Dropping from above-average to standard finishes touches the interior-finish and exterior-finish stages (38% of the budget) and saves roughly $40 per square foot; a cheaper roof line or a rectangular footprint saves in framing and foundation (28%); a slab instead of a crawl space saves 2–4% in foundation. Materials you can price yourself: the concrete slab calculator for the foundation, the roofing calculator, the flooring calculator and the drywall calculator. Materials are about half of construction cost; labor is the other half.

Garage, basement and the costs that are not “per square foot”

Garage. An attached garage is unfinished space on a slab, so it costs about $60 per square foot nationally: $17,000 for a one-car (280 sq ft), $29,000 for a two-car (480 sq ft) and $42,000 for a three-car (700 sq ft), scaled by the state index. Dimensions and what fits are on the garage size calculator.

Basement. An unfinished basement adds about $30 per square foot of footprint over a slab (deeper excavation, taller foundation walls, waterproofing) — $60,000 under a 2,000 sq ft one-story house, $30,000 under a two-story with a 1,000 sq ft footprint. Finishing it costs another $45–50 per square foot, which is still the cheapest finished space you can add to a house; the finished basement ROI calculator covers resale value.

Site work and utilities. The $25,000 default covers clearing, grading, a short driveway and connecting to municipal water, sewer and power at the street. A rural lot with a well ($8,000–$15,000), a septic system ($10,000–$25,000), a long driveway and a power-line extension ($10–$25 per foot) can run $60,000–$100,000. Permits, plans and fees. Stock plans cost $1,000–$3,000 and an architect 8–15% of construction; permits and impact fees range from under $2,000 in rural counties to $30,000+ in parts of California and the Mountain West. The slider’s 5% default fits a stock plan in a typical suburb.

Build vs. buy: when building makes sense

Nationally the median existing home sold for about $418,000 in September 2026 (NAR), and the median existing home in ZIP-level data is around $289,000. A 2,000 sq ft standard build costs $370,240 before land. Whether building wins depends almost entirely on the lot:

• You already own the lot (inherited, a tear-down, a rural parcel): building a standard house usually costs the same as or less than buying an equivalent new house, and you get the layout you want. The tool’s build-vs-median line applies directly.
• You must buy the lot: add $50,000–$150,000 in most suburbs and $300,000+ in coastal metros. Then compare with the median home value in the city you are targeting, and remember that a new house carries lower maintenance for ten years and higher property taxes from day one (assessed at full value).
• Financing: a construction loan runs 0.5–1 percentage point above a 30-year mortgage, is interest-only during the 9–14 months of the build, and needs 20–25% down on land plus construction; it converts to a permanent mortgage at completion. Budget interest of roughly 3–4% of the construction cost over the build.
• Timeline: 7–9 months for a production builder, 10–14 months for a custom house, plus 2–4 months of design and permitting before ground breaks.

How to cut the cost of building a house

1. Simplify the shape. A rectangle with a simple gable roof costs 10–15% less per square foot than the same area with bump-outs, dormers and multiple roof lines — framing, foundation and roofing all shrink.
2. Go up, not out. Two stories save about 5% per square foot and a lot of site work.
3. Standard finishes in the bedrooms, money in the kitchen. Finish level is 38% of the budget; buyers and appraisers reward kitchens and primary baths, not bedroom trim.
4. Stock plans instead of a full architectural commission save 5–10% of construction.
5. Bid the project to three builders with the same plans and allowance schedule; bids on identical plans routinely differ by 15–20%.
6. Fix the allowances for cabinets, appliances, tile, lighting and plumbing fixtures in writing — allowance overruns are where most “the house cost $60,000 more than the quote” stories come from.
7. Skip the basement in a dry, warm climate; a slab is $30 per square foot cheaper and in Texas, Florida and Arizona nobody expects one.
8. Act as your own general contractor only if you have done it before. It saves the 15–25% builder markup and costs most first-timers more than that in delays and rework.

Compare the finished number against the price of an existing house of the same size on the price per square foot page, and against the cost of renovating one with the renovation cost tool.