Cost to Build a House in 2027: Stage-by-Stage Breakdown From Foundation to Finishes
By Virginia Viadas
Quick answer: Building a typical new single-family home costs about $150 to $280 per square foot for construction alone in most U.S. markets, excluding land. The most recent National Association of Home Builders (NAHB) Construction Cost Survey puts the average construction cost at $428,215, or $162 per square foot, for a 2,647 sq ft home. Interior finishes are the most expensive stage at 24.1% of construction cost. For 2027 budgets, builders should expect materials to keep rising: NAHB's July 2026 builder survey found material costs up 6.7% year over year.
Key numbers at a glance
- Average construction cost (NAHB): $428,215, or $162 per sq ft
- Average new-home sales price (NAHB sample): $665,298
- Construction as a share of sales price: 64.4%, a record high for the series
- Largest stage: interior finishes, $103,391 (24.1%)
- 2026 planning range, construction only: $150–$280 per sq ft in most markets; $450+ in high-cost metros
How much does it cost to build a house in 2027?
NAHB's survey is the most detailed national benchmark. It was conducted in fall 2024 and published in January 2025. NAHB has not released a newer edition. Since then, costs have kept climbing:
- Builders responding to the July 2026 NAHB/Wells Fargo Housing Market Index reported that the cost of materials for the same house rose 6.7% over 12 months.
- Associated Builders and Contractors (ABC) reported that overall construction input prices in August 2026 were 8.9% higher than a year earlier.
- Builders surveyed by NAHB estimated that recent tariff actions add a typical $10,900 per home.
Most 2026 cost guides now place construction-only budgets at $150 to $280 per square foot nationally. Dense coastal metros run to $450+. For a 2,500 sq ft home, that's roughly $375,000 to $700,000 before land.
What does each stage of construction cost?
The table shows NAHB's eight-stage breakdown. Use the percentages to scale your own budget. If your construction budget is $500,000, framing at 16.6% means about $83,000.
| Stage | Average cost | Share of construction cost | Biggest line items |
|---|---|---|---|
| 1. Site work | $32,719 | 7.6% | Permit fees ($7,640), architecture & engineering ($6,480), impact fees ($6,367) |
| 2. Foundation | $44,748 | 10.5% | Excavation, concrete, backfill ($43,002) |
| 3. Framing | $70,982 | 16.6% | Framing incl. roof ($49,763), trusses ($12,903), sheathing ($6,513) |
| 4. Exterior finishes | $57,510 | 13.4% | Exterior wall finish ($24,450), roofing ($16,732), windows & doors ($15,990) |
| 5. Major systems rough-in | $82,319 | 19.2% | Electrical ($27,383), plumbing ($27,180), HVAC ($26,938) |
| 6. Interior finishes | $103,391 | 24.1% | Cabinets & countertops ($19,056), flooring ($15,388), drywall ($13,962) |
| 7. Final steps | $27,710 | 6.5% | Driveway ($9,635), landscaping ($9,269), decks & patios ($4,722) |
| 8. Other | $8,835 | 2.1% | Uncategorized costs |
| Total | $428,215 | 100% | About $162 per sq ft |
Source: NAHB, "Cost of Constructing a Home – 2024" (published January 2025).
Which stages have gotten more expensive?
Mechanical, electrical and plumbing systems are taking a bigger share of every house. In NAHB's survey, major systems rough-ins rose from 17.9% of construction cost in 2022 to 19.2% in 2024. Framing's share fell from 20.5% to 16.6%, the lowest since NAHB began this breakdown in 2013.
That trend is likely to continue into 2027. ABC reported that switchgear, copper wire and cable, iron and steel, and softwood lumber were all up more than 10% year over year in August 2026. Copper-heavy electrical packages are now one of the fastest-rising parts of a home budget. For material-by-material detail, see our report on construction material prices in 2026.
Where does the rest of a new home's price go?
Construction is only part of what a buyer pays. NAHB's sales price breakdown:
| Component | Average | Share of sales price |
|---|---|---|
| Construction cost | $428,215 | 64.4% |
| Finished lot | $91,057 | 13.7% |
| Builder profit (pre-tax) | $72,971 | 11.0% |
| Overhead and general expenses | $38,248 | 5.7% |
| Sales commission | $18,955 | 2.8% |
| Financing | $10,220 | 1.5% |
| Marketing | $5,633 | 0.8% |
| Total sales price | $665,298 | 100% |
Source: NAHB, "Cost of Constructing a Home – 2024."
What will move building costs most in 2027?
- Tariffs on steel, aluminum, copper and Canadian lumber. Our complete guide to U.S. construction material tariffs tracks each duty.
- Lumber. Framing is still about one-sixth of construction cost. See our lumber prices 2026 guide for species-by-species pricing.
- Labor. Electricians, plumbers and HVAC technicians drive the fastest-growing stage. Our labor shortage analysis shows where the gaps are worst.
- Financing. Freddie Mac's 30-year fixed rate averaged 7.03% on September 24, 2026, up from 6.30% a year earlier. Higher rates raise construction-loan carrying costs and reduce buyer budgets.
- Builder size. In NAHB's July 2026 survey, builders with five or fewer starts reported a median material cost increase of 9.1%, versus 1.8% for builders with 100 or more starts. Small custom builders have less purchasing leverage, so their quotes rise faster.
How do you estimate your own build cost?
- Start with $150–$200 per sq ft for a mid-range home in an average-cost market. Use $250–$450+ for coastal metros.
- Multiply by your heated square footage.
- Check the result against the NAHB stage percentages above. Any stage far off the national share deserves a question for your builder.
- Add land, permits, and utility connections if they aren't in the contractor's quote.
- Add 10% contingency, plus 5% escalation if the build starts more than six months out.
- Use our guide on how to calculate square meters and square footage to measure irregular floor plans accurately.
Frequently asked questions
How much does it cost to build a 2,000 sq ft house in 2027?
At $150–$280 per sq ft, a 2,000 sq ft house costs roughly $300,000 to $560,000 for construction alone, excluding land. At NAHB's national benchmark of $162 per sq ft, it's about $324,000 before 2025–2026 cost increases.
What is the most expensive part of building a house?
Interior finishes are, at 24.1% of construction cost in NAHB's survey. That includes cabinets, countertops, flooring, drywall, trim and paint. Major systems (electrical, plumbing, HVAC) come second at 19.2%.
Is it cheaper to build or buy a house in 2027?
In most markets, buying an existing home is still cheaper per square foot. Building makes more sense when you already own land, need a specific layout, or local resale inventory is very tight.
How long does it take to build a house?
Most single-family homes take 7 to 12 months from permit to completion. Permitting and labor shortages are the most common causes of delay.
Will construction costs go down in 2027?
There's no sign of that yet. ABC reported input prices up 8.9% year over year in August 2026, and NAHB builders reported material costs up 6.7% over 12 months as of July 2026.