Describe the job once and up to 5 local builders come back with quotes across all boroughs — from zone 1 flats to outer-London semis. Free for homeowners, no call floods — the enquiry closes automatically at five firms.
Takes about a minute · your number is shared only with firms that quote
Extensions, loft conversions and structural openings
Garden walls, patios and brickwork
Full refurbishments and renovations
Small works — from repointing to garage conversions
Single-storey extensions typically run £2,200–£3,200 per m²; smaller building jobs are usually quoted per job after a site visit. Victorian terraces and period conversions make access and existing services the big price factors here.
Always compare more than one written quote — that's exactly what this service is for.
Nothing — it's free for homeowners. Up to five London firms respond, you pick who you trust, or nobody at all.
Firms with the ✓ Verified badge have their public liability insurance checked and are approved by a human at Graftum. You can also browse the verified directory and pick a firm yourself.
Most people hear from two or three firms within a day or two. Mark the job "Emergency / ASAP" if it can't wait.