Describe the job once and up to 5 local groundworks firms 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
Foundations, footings and concrete slabs
Drainage runs, soakaways and manholes
Driveways, kerbs and external works
Site clearance and muck away
Groundworks are quoted per job — foundations for a typical extension often run £8,000–£20,000 depending on soil and access. 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.