How should you split a house build budget?
Land, hard construction and soft costs usually sit in separate buckets on a house you build yourself. Enter your total budget and plot share to see structure, design, fees and contingency split. This is planning arithmetic, not a quote reading and not a fairness score.
Split your budgetWhat buckets does a house budget usually use?
- Land or plot purchase and connection rights
- Hard construction: structure, envelope, services and fixed finishes
- Soft costs: design, permits, professional fees, finance and contingency
How should you use the split?
Treat the output as a planning map before quotes arrive. When a builder sends a total, turn the PDF into a table or order a paid reading if you need missing headings and cost per m² on that file.
What defaults does the calculator use?
| Input | Typical starting point |
|---|---|
| Land share of total | 25% (edit to match your market) |
| Hard construction of build cost | 78% (structure and finishes) |
| Soft costs of build cost | 22% split across design, fees, contingency |
Does this replace a quantity surveyor?
No. It does not read a quote file or verify a contractor's lines. It only divides a number you type into buckets you can adjust.
Questions on this
Should land be included in the total?
Yes on this form: land is a slice of the same total budget. If you already own the plot, set the land share to zero.
What counts as hard construction?
Everything that becomes the built house: structure, roof, windows, services and fitted finishes the contractor installs.
What counts as soft costs?
Design, surveys you commission, permits, lender fees, insurance during build and contingency you hold back.
Will this say my quote is too high?
No. There is no market comparison here. The paid quote reading lists structure on a file; it still does not score fairness.
Renovation or extension?
The same buckets apply. Land share is often zero; hard costs may include demolition and making good.
Split your budget
Share of the total budget, not of build cost alone.
Build cost is what remains after land.
Split soft costs (% of soft total)
| Bucket | Amount | % |
|---|---|---|
| Land / plot | USD 125,000 | 25% |
| Hard construction | USD 292,500 | 59% |
| Soft costs (total) | USD 82,500 | 17% |
| Design and drawings | USD 20,625 | 4% |
| Permits and fees | USD 20,625 | 4% |
| Finance and contingency | USD 41,250 | 8% |
| Total | USD 500,000 | 100% |
Percentages are starting points you can edit. This is not a quote reading, a loan offer or advice on whether to sign.