Construction Cost Calculator

Whole-project cost estimate from square footage, project type, finish quality and regional zone — with soft costs, GC fee and contingency. For early-stage budgeting, not bidding.

Project

ft²
Total gross conditioned area.

Complexity

Soft costs & markups

%
Typical range 8–15 %.
%
Typical range 15–25 %.
%
10 % new build; 15–20 % renovation of old buildings.
$
Added at the end. Leave blank if already owned or N/A.

Project budget estimate

Total project cost

$ —

Hard construction cost

$ —

Soft costs

$ —

General Contractor fee

$ —

Contingency

$ —

All-in cost per ft²

$ — /ft²

Cost per ft² is all-in: hard + soft + GC + contingency + land, divided by gross square footage. For renovation projects, the “existing condition” multiplier reduces hard cost based on what is already built.

Accuracy ±20-30 %. Construction cost estimates depend heavily on site conditions, market timing, design complexity, finish selections and local labour availability. Use this for early-stage budgeting and go/no-go decisions only. For any project above $50,000, get itemised bids from at least three contractors before committing.

How construction cost is built up

A construction budget is a stack of percentages applied to a hard cost base. The hard cost is the labour and materials that physically build the project. On top of that come soft costs (permits, architect, engineer, inspections), the general contractor fee (management, profit, insurance), and a contingency reserve for the unknowns that surface during construction.

hard = base_$/ft² × MEP × existing × regional × sqft
soft = hard × soft%  ·  GC = (hard + soft) × GC%
subtotal = hard + soft + GC  ·  contingency = subtotal × cont%
total = subtotal + contingency + land_cost

Worked example — 2,500 ft² new home in Texas (South Central)

  • Base = Standard residential $165/ft² × Standard MEP × South Central ×0.94 = $155.10
  • Hard cost = $155.10 × 2,500 = $387,750
  • Soft (12 %) = $46,530
  • GC fee (20 %) on hard + soft = $86,856
  • Subtotal = $521,136
  • Contingency (10 %) = $52,114
  • Total = $573,250 (all-in $229/ft²)

Base cost reference (2026 U.S. national, before regional multiplier)

Project typeEconomyStandardPremiumLuxury
Residential — New$130$165$230$350
Residential — Renovation$75$125$200$300
Office — Single-story$240$350$440$560
Office — Mid-rise / high-rise$330$500$700$870
Retail$200$300$400$550
Warehouse / Industrial$80$130$200$280
Restaurant$350$500$700$950
Hotel$300$470$605$770
School (K-12)$360$510$620$730
Healthcare$400$600$850$1,170

Sources: NAHB Cost of Constructing a Home 2024, RSMeans Construction Cost Data, Cumming US Construction Per Square Foot Data. All values in 2026 USD per gross square foot, before regional multiplier.

Regional cost zones

ZoneStatesMultiplier
Pacific & AlaskaCA, OR, WA, HI, AK×1.35
NortheastNY, NJ, MA, CT, RI, NH, VT, ME, PA×1.22
Mountain WestCO, AZ, NV, UT, ID, MT, WY, NM×1.08
MidwestIL, IN, OH, MI, WI, MN, IA, MO, KS, NE, ND, SD×1.00 (national avg)
South AtlanticFL, GA, NC, SC, VA, WV, MD, DE, DC×0.96
South CentralTX, OK, AR, LA, MS, AL, TN, KY×0.94

Regional multipliers reflect the labour-cost differential between markets. Material costs vary much less because they ship nationally. The largest differential is between Pacific high-cost-of-living metros (San Francisco, Seattle, Honolulu) and small markets in the rural South or Mountain West.

Frequently asked questions

How much does it cost to build a house per square foot in 2026?
U.S. national average for a new single-family home is about $165/ft² hard cost at the Standard quality grade, before regional adjustment. With soft costs, GC fee and contingency, all-in cost typically runs $240-$280/ft² nationally — higher on the coasts and lower in the South.
How much does it cost to build a 2,000 sq ft house?
In the Midwest (national average) at Standard quality, the hard cost is about $330,000 and the all-in cost (with soft costs, GC fee and contingency) runs around $470,000-$500,000. California adds 35 % to those figures, the South subtracts 5-10 %.
What is the difference between hard cost and soft cost?
Hard cost is the labour and materials that physically build the project — concrete, framing, MEP, finishes, landscaping. Soft cost is everything else: architect/engineer fees, permits, inspections, surveys, insurance, construction loan interest. Soft cost typically runs 8-15 % of hard cost.
What is a contingency in a construction budget?
A reserve added on top of the budget to cover unknowns. For new construction the standard is 10 %; for renovation of older buildings (where surprises are guaranteed) it should be 15-20 %. Owners often add a separate "owner contingency" of 5-10 % above the contractor contingency.
Why is my custom home costing $400 per square foot?
Custom homes at the Premium quality grade run $230/ft² hard cost; at Luxury, $350/ft². Add soft costs, GC fee, contingency and regional multipliers and the all-in $/ft² easily exceeds $400 in expensive markets. The biggest cost drivers are kitchen and bath finishes, custom millwork, structural complexity and HVAC zoning.
How accurate is a square-foot cost estimate?
Plus or minus 20-30 % at the early-stage budget level. As the design firms up and specifications harden, that range shrinks. The actual bid prices from contractors are what matter — use the calculator to right-size the budget, not to sign contracts against.
Should I include land cost in construction cost?
Conceptually they are separate: land is an asset, construction is the build. But for total project financing they are summed. The calculator separates land from construction so you can see each cost clearly; turn off the land field if you are not buying land for this project.