From £6,658
Prestige Construction & Building Services Ltd is a family-run business with over 30 years industry experience. We offer a Design and Build service ...
From £6,650
Experienced extension builder ready to quote for your work. RICHARD MORRIS (CONSTRUCTION) is the best extension builder in CM21. No obligation free...
From £6,274
Need an Extension Builder in CM21? Loft in Space London has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £6,418
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,306
With over 20 years of experience we specialise in fit-outs and maximising your living space. Lofts, extensions, basements, new builds and domestic ...
From £6,418
Welstrong Construction is a team of friends and brothers who enjoy working in the building industry and aim to make sure every customer is fully sa...
From £6,090
Urban lofts and extensions ltd is an established extension buildering business in CM21. We come highly recommended and provide competitive quotes f...
From £6,250
Our building services company Added Space Ltd have over fifty years combined experience. We have been helping customers in Harlow and the surroundi...
From £5,114
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,274
Nevill Design & Build specialises in high-quality house extensions, loft conversions, structural alterations, and full refurbishments. We’ve deli...

Concrete foundations range from the £5,114 (V S M Property Services Ltd based in CM23) to £6,658 (Prestige Construction & Building Services Limited based in CM21) in CM21.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in CM21 by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Concrete Foundations near Harlow | £43 | £288 |
| Concrete Foundations near Bishop's Stortford | £42 | £264 |
| Concrete Foundations near Ware | £47 | £296 |
| Concrete Foundations near Hoddesdon | £46 | £296 |
| Concrete Foundations near East Hertfordshire | £44 | £289 |
| Concrete Foundations near Hertford | £46 | £289 |
| Concrete Foundations near Cheshunt | £48 | £286 |
| Concrete Foundations near Epping Forest | £44 | £273 |
| Concrete Foundations near Loughton | £44 | £273 |
| Concrete Foundations near Welwyn Garden City | £42 | £268 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,495

Two storey extension - £87,993

Build a timber frame extension - £25,995

Build a swimming pool - £80,995

Single storey extension - £54,904

Side return extension - £41,446

Install an RSJ - £2,195

Outbuilding - £9,995

Build a Mansard loft conversion - £51,995

Loft conversion - £33,705

Build a kitchen extension - £41,995

Hip to gable loft conversion - £41,995

Granny annexe - £86,995

Garden office - £9,995

Convert a Garage - £15,995

Garage - £18,495

Build a flat roof extension - £21,995

Build a dormer loft conversion - £41,995

Concrete foundations - £6,245

Convert a bungalow loft - £28,995

Convert a basement - £37,446