COST TO BUILD
A HOUSE
CONSTRUCTION COST CALCULATOR
Try before you buy, demo a cost to build report
Demo a sample reportOrder a custom online Cost To Build Report!
Specific to your house plan and your local building lot zip code. After you LOGIN you can make selections, choices, changes and adjustments to develop a "line-item Cost to Build Report".
Need help? Watch our video on how to get your custom Cost to Build Report
See how we compare to the rest.
Our ReportsOur Construction Cost Calculator, powered by StartBuild eliminates the guesswork of estimating construction costs. Our state of the art estimator is based on years of experience in the industry, and is continuously updated with current costs for materials and labor.
It's Accurate & Up to date.
Our estimator accounts for the house plan, location, and building materials you choose, with current market costs for labor and materials.
It's Fast & Flexible.
Receive a personal estimate in two business days or less, with 30 days to change your options.
It's Inexpensive.
For just $32.95 for internet home plans and $49.95 for custom plans, you can have the security of knowing how much it will cost to build your home - before the first nail is hammered!
For just $32.95 you get:
- Customized Budget for YOUR online house plan
- Unlimited access for 30 days
- Ability to Export to Excel or PDF
For just $49.95 you get:
- Upload and store your plan files
- Customized Budget for YOUR build
- Unlimited access for 30 days
- Ability to Export to Excel or PDF
If you've found a house plan that you like, simply copy the URL / Link to it, paste it in the box above and hit "GO".
You'll be taken to a page where you can answer a few quick questions and order your report.
Just drag your plan files from your computer into the box above and hit "GO".
You'll be taken to a page where you can answer a few quick questions and order your report.
We use the data from your house plan plus a few other questions
Then you can see how questions to our 60+ line item costs affect your overall build cost.
See changes to your budget in real time
Export to PDF or Excel
60+ Line Items
Only 20+ Line Items
6 pages
Only 1-2 pages
Where do you get the costing data?
The construction cost calculator is powered by StartBuild technology.
StartBuild uses a “blended” costing database that includes published national, regional, state, zip code, and actual builder costs for finished homes. We update costs and data 10 to 12 times a year.
StartBuild has been providing Cost To Build reports for new homes for almost 20 years.
What if I don't have a URL or link to my house plan?
We can still help you! Just contact us and someone from our knowledgeable staff will contact you directly to hear about your plan and help you estimate its cost.
How accurate is the report?
We work to be conservative and accurate to within 10%. Your choices, changes, and adjustments will also have an important impact on the line item costs.
We strive to provide a good starting point construction cost estimate for your new home project, but you should also seek real bids and quotes from builders, subcontractors, and suppliers to finalize your construction budget before you start building.
What does it really cost to build a house?
The honest answer is: it depends — on your plan, your location, your lot, and dozens of line items that most online calculators never show you. Published averages range from $100 to $400+ per square foot in 2026, and both ends of that range are real for different projects. Two homes with identical square footage can land $150,000 apart based on foundation type, finish level, and site conditions alone.
That's the problem with searching for a single “average cost to build a house.” The number that matters is the one tied to your specific plan in your specific location — and that number requires a detailed, line-item estimate, not a statewide average.
What drives construction costs up (and down)
Location & local labor
Labor rates vary significantly by state, county, and metro area. Building in a high-demand market with tight subcontractor availability costs more than building in a rural area with competitive bidding.
Foundation type
Slab, crawl space, or full basement — each has a different cost. In frost-prone climates, foundation decisions have a meaningful impact on both upfront cost and long-term performance.
Plan complexity
A compact rectangle costs less per square foot than a plan with complex rooflines, multiple bump-outs, tall great rooms, or large spans requiring engineered beams.
Finish level
Cabinets, countertops, flooring, windows, and fixtures can swing a budget by $30–$80 per square foot. This is where “average” estimates most often mislead.
Site conditions
Clearing, grading, rock excavation, long utility runs, and well or septic installation can add tens of thousands before the foundation is even poured.
Permit & soft costs
Permit fees, engineering, surveys, inspections, and financing carry costs are real budget items that many estimates leave out entirely.
Nearly 20 years of cost-to-build data
CostToBuildAHouse.com is powered by StartBuild, which has been producing detailed construction cost reports for homeowners, builders, and appraisers since the mid-2000s. Our database is updated 10 to 12 times per year with current material and labor costs at the national, regional, state, and zip code level.
The result is a line-item report tied to your actual house plan — not a square-footage multiplier. You can adjust foundation type, finish level, and building location online, and see exactly how each choice affects the bottom line before you break ground.
For $32.95, it's the most affordable way to get a realistic construction budget before committing to bids, loans, or design changes. See how it works →
Cost to build a house by state
Explore 2026 cost breakdowns for your state — labor rates, regional differences, and what to budget for your specific project.