For residential builders
Present renovation, extension and custom-home budgets as an honest range, with the assumptions, allowances and exclusions behind the number. Win the right clients before you spend days estimating.
Coastal House, Stage 2
Bilgola Plateau, NSW · 124m² renovation + extension
Where trust breaks
One number is a promise you can't keep.
Early-stage clients fixate on a single figure in a spreadsheet, then hold you to it months later, long after the scope has moved. The fix isn't a better number. It's showing the thinking behind it.
Before: a cell in a spreadsheet
No range. No assumptions. No exclusions. Just a number they'll remember.
After: an explained range
Coastal House concept budget
Concept budget builder
Set the project type, area, finish level and complexity. Proposr prices it against a built-in rate library, or your own accepted quotes, and returns a defensible low / likely / high range you can stand behind.
| Driver | Setting | Effect |
|---|---|---|
| Project type | Reno + extension | base |
| Floor area | 124 m² | $1,520/m² |
| Finish level drives range | Medium | ±9% |
| Site complexity | Sloping | +$14,200 |
| Contingency | 7.5% | +$17,300 |
| Most likely budget | $248,400 |
Reusable allowance blocks
Drop in the allowances every residential job needs, already labelled the way clients and contracts expect. Save your standard figures once and reuse them across every budget.
Scenario comparison
Present standard, premium and staged paths side by side. Clients self-select toward a budget that works, and the conversation turns to scope instead of price.
The brief as drawn, medium finish throughout.
$248,400 most likely · incl. GSTUpgraded finishes where they show most.
$311,900 most likely · incl. GSTCore build now, fit-out in a second phase.
$258,200 across 2 stages · incl. GSTPaid preconstruction
Turn the early budgeting, selections and coordination into a paid preliminary proposal. Qualify the client, cover your time, and lock in the relationship before a contract is signed.
Start with a concept budget that explains itself. Bring your rates, your allowances and your brand; Proposr does the rest.