Extension quote template for UK residential builders.
A better extension quote starts with sections, not a lump sum.
Structure extension quotes around groundworks, shell, roof, windows, first fix, second fix, preliminaries, margin, variations, and stage payments.
Extension quote preview
Break the price into build stages so clients and cash flow stay clear.
Template preview
Groundworks
£11,800
Excavation, foundations, drainage
1
Shell
£24,500
Brickwork, steels, roof structure
1
Services
£7,900
First fix plumbing and electrical
1
Finish
£13,600
Plastering, second fix, decoration
1
| Section | Item | Qty | Allowance |
|---|---|---|---|
| Groundworks | Excavation, foundations, drainage | 1 | £11,800 |
| Shell | Brickwork, steels, roof structure | 1 | £24,500 |
| Services | First fix plumbing and electrical | 1 | £7,900 |
| Finish | Plastering, second fix, decoration | 1 | £13,600 |
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Scope wording
This quote is based on the scope and assumptions listed. Any work outside this scope will be priced and agreed before proceeding.
Payment wording
Payment stages are due at the milestones shown. Materials, variations, and additional work may require separate agreement.
Make the scope readable
Clients need to understand what is included, what is excluded, and where allowances might change.
Protect cash flow
Suggested upfront and staged payments matter when materials, scaffolding, and subcontractor costs come early.
Plan variations early
Extensions change. Clear variation wording helps stop extras becoming unpaid favours.
What to do before you send the price.
Step 1
Break the project into major build stages.
Step 2
Add labour, material, plant, waste, access, and subcontractor lines.
Step 3
Set exclusions, assumptions, stage payments, and variation terms.
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Send me the builder quote template.
You will get the spreadsheet template and calculator. If you want the quote-to-profit workflow, start the trial after.
Quick answers.
Should an extension quote be itemised?
It should be structured enough to explain the price and protect the builder, even if every supplier line is not shown to the client.
Can QuoteBuild record staged payments?
Yes. Accepted quote totals can be turned into manual stage records so you can track what has been paid directly to you.