Extensions live or die on prelims, programme, and materials inflation. Your quote needs day rates and packages that still read clearly to a homeowner — while recovering overheads you cannot see from a spreadsheet tab.
Builders rarely lose money only on labour day rates. They lose it when muck-away, access, propping, and small works packages hide inside one round figure. Quotimiser helps you surface those lines, apply sensible wastage on measured materials, and carry the same logic into staged invoices when the job runs for months.
Break out welfare, skips, protection, temporary works, and survey allowances so variations have a reference point. When the architect moves a door, you can point to the line that always carried risk — instead of arguing from memory.
Use daywork for unpredictable sequences and packaged rates for repeatable shells — customers understand the difference when you label it honestly, and you stop cross-subsidising slow weeks with optimistic fixed totals.
Model plasterboard, insulation, and structural packs with realistic waste percentages and merchant pack sizes — so m² rates on the page match what you actually order, not what looked neat in the meeting.
Deposits, key stages, and retention-style balances belong in the quote language from day one. Carry those stages into invoices so homeowners and contract administrators see the same structure you priced.
Follow the path below for builders — deep guides, templates, calculators, and product surfaces that reinforce the same pricing habits from first quote through to payment.
Invoice-only tools assume the price was right at the start. Quotimiser is built around structured job costing first — so extensions and refurbs keep margin visible when materials move and access changes.
Yes — grouping and plain headings matter more than hiding lines. Customers accept detail when it explains where their money goes and reduces mid-job shocks.
Yes. It is designed for sole traders and small UK firms who need consistent quoting and invoicing without enterprise job-costing complexity.
Yes. Use payment schedules that mirror your quote stages, then invoice each stage from the same structured totals.
New to Quotimiser? Read the help centre or browse resources.