From a working contractor · NAHB 2024 cost data
Know what your house really costs
Get a line-by-line budget for your state before you sign with a builder. I built the same sheet I use to check bids on my own jobs.
Main Build System 2026 · Excel · works in Numbers
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Get Main Build System for $3430-day money-back guarantee · one-time payment · instant download
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What would your house cost?
Pick your state, size, finish and build type. Same math as the spreadsheet.
Your ballpark build cost
| Stage | Cost |
|---|---|
| Permits, fees and site work | $00,000 |
| Foundation | $00,000 |
| Framing and roof | $00,000 |
| Plumbing, electrical, HVAC | $00,000 |
| Interior finishes | $00,000 |
The full breakdown unlocks in the spreadsheet: every line item, materials vs labor, schedule and loan draws.
Unlock Main Build System for $34A ballpark from national NAHB 2024 cost data, adjusted for your state and a 6% price update. It is not a bid. Land is not included.
This is for you if
You need a number you can trust
- You have waited weeks for a builder to send you a price.
- You can't tell if a quote is fair or padded.
- You're scared the budget blows up halfway through.
- You have no plans yet, so nobody will price your house.
- You're a builder who wants to quote the client the same day.
Three ways to get a number
Guess, wait, or know
| $/sq ft online | Builder bids | Main Build System | |
|---|---|---|---|
| Time to a number | Minutes | Weeks | 5 minutes |
| Line by line | No | Varies | Yes |
| Adjusted to your state | No | Yes | Yes |
| Checks builder bids | No | No | Yes |
| Hidden costs + contingency | No | Varies | Yes |
| Loan draws and interest | No | No | Yes |
| Cost | Free | Free | $34 once |
What you get
One spreadsheet, start to move-in
Line-by-line estimate
Total cost, cost per sq ft, every stage, materials vs labor. Works with or without plans.
Hidden costs
The costs most budgets forget: well, septic, hookups, insurance, loan interest. Plus your contingency.
Bid checker
Put three builder quotes next to your estimate. Padded lines and missing items stand out.
Loan and draw planner
What the bank pays at each draw, the interest while you build, and the cash you bring.
Estimate vs actual
Log every payment. Overruns show up the day they happen, not at the end.
Client quote sheet
For builders: add your margin and send the client a price today.
Included today
Bonuses
- Quick-start video. I walk you through your first estimate.
- Questions to ask your builder + red flags. License, insurance, allowances, payments, warranty.
- Permits and inspections checklist. What each phase needs so the job never stalls.
- Build vs buy calculator. Find out if building beats buying where you live.
- Builder scorecard. Rank three builders on the things that matter.
Can I trust the number?
Built by a contractor, on public data
- $162 per sq ft base. NAHB, Cost of Constructing a Home, 2024 survey.
- State factor for all 50 states. Or type your own local factor.
- Real stages. The same line items I check when I price a job.
A planning estimate, not a contractor bid. Your price depends on your site, design and builder. Land is not included.
Everything you get today
The Main Build System 2026
Secure checkout · card, Apple Pay, Google Pay · instant access
Do the math. One bad guess on a build costs thousands. One change order costs hundreds. This costs $34 once, and you can run as many estimates as you want.
After you pay
No surprises
- Secure checkout. One-time payment, no subscription.
- Instant access. Your download link shows on screen and comes by email.
- Open it and start. Excel 2010 or newer, Windows or Mac, or Apple Numbers.
FAQ
Questions
I know nothing about construction. Can I use it?
Yes. You answer simple questions: state, size, rooms, finish. The sheet does the math.
I don't have plans yet. Does it work?
Yes. Add the rooms you want and it adds up the area. Have plans? Type the total square feet.
Does it work for a barndominium, ADU or addition?
Yes. Pick the build type and the estimate adjusts.
Where do the prices come from?
The NAHB 2024 national cost survey, adjusted by a state cost factor. You can type your own local factor.
Is this a contractor bid?
No. It's a planning budget and a way to check quotes. Land is not included.