From site measurements to a professional quote.
Answer a short set of questions about the job — on your phone, on site. BuildLegend works out the materials and labour, prices them, applies your margins, and gives you a branded quote your customer can accept online.
Priced on site, before the tea goes cold.
Extensions, garages, garden rooms, conversions — the jobs small firms actually do. Measure up, answer the questions, and the number is ready while you're still stood in the garden.
Three steps. No spreadsheet. No guesswork.
Your rates, once
A blended hourly rate is enough to start. Add rates by trade and charge-out rates when you want them. Cost and charge are always kept apart, so profit is never applied twice.
A short, guided job
Dimensions, roof, walls, openings, drainage, finish — about ten screens, on site, on your phone. Say "I don't know" to anything specialist and it becomes a visible assumption, not a silent guess.
A quote you can stand behind
Bill of materials, labour hours, provisional sums, stage payments, exclusions and VAT — reviewed by you, then sent as a PDF and a secure page the customer can accept.
A 4m × 5m rear extension, priced by the engine right now
Fictional job, platform catalogue prices dated 2026-09-24, default labour rate. Every figure below comes from the same deterministic engine your quotes use.
Pick the build type. The questions, quantities and allowances come with it.
Every template says what it prices, what it carries as a provisional sum, and what it leaves out.
Single-storey extension
Rear or side extension on one level — kitchen-diners, living rooms, utility rooms.
Worked example →
Wraparound extension
Rear extension plus a side return, joined into one L-shaped space.
Worked example →
Two-storey extension
Ground floor plus a bedroom or bathroom above, tied into the existing house.
Worked example →
Detached garage
Single or double garage standing on its own.
Worked example →Attached garage
Single or double garage built against the house.
Worked example →Garage with office above
Double garage with a home office or studio on the first floor.
Worked example →
Garage with self-contained flat above
Double garage with a separate flat above — its own access, services and fire separation.
Worked example →
Carport
Open-sided or partly enclosed roof over parking, on posts and pads.
Worked example →
Conservatory or orangery
Glazed room on a dwarf wall. Frames and glazed roof are supplier quotations; the base, walls and trades are priced.
Worked example →
Garden room / home office
Insulated, heated garden building on a slab — office, gym or studio.
Worked example →
Garage conversion
Turn an existing garage — attached or detached — into a habitable room: infill the door, insulate, line, heat and finish.
Worked example →The jobs that keep a small firm busy.
A quote that reads like you know what you're doing. Because you do.
Customers get a clean, branded quote with the work described in plain English: what's included, what's provisional, what's excluded, how payments fall due. They accept online and you get a record of who, when and which version.
- Branded PDF and a secure quote page — no cost rates, supplier names or margins leak through.
- Stage payments worked out in pounds, printed on every quotation.
- Accept, question, request changes or decline online.
- Follow-up reminders on your schedule, cancelled the moment the customer replies.
Honest about prices
Material prices come from your own price book first, then from BuildLegend's dated catalogue allowances. Every line says which. A price that isn't available stays visibly unpriced — it never becomes £0, and it never becomes a fake "live" price.
Your merchant, your prices
Type in the prices you actually pay, or import your merchant's price list as a CSV. Your prices beat the catalogue automatically, and the materials list for every job comes out ready to send for a quote or a delivery.
Everything a small builder needs to price and win the job
Estimating software for builders
How BuildLegend works out materials, labour and margins from your measurements.
Builders quote template
The 12 things every UK quotation should include.
How to price an extension
A step-by-step guide, including the costs most often missed.
Invoicing for builders
Deposit and stage invoices from the accepted quote, with Xero export.
Extension cost calculator
Free, itemised, worked out the way builders price it.
Compare estimating software
What matters for a small firm, and typical prices.
Quote your next job in minutes
14-day free trial. No card needed to start. Works on the phone already in your pocket.