From £17,852
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,524
Need an Extension Builder in CM17? Loft in Space London has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £17,668
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 £17,340
Urban lofts and extensions ltd is an established extension buildering business in CM17. We come highly recommended and provide competitive quotes f...
From £17,580
VIBE CONSTRUCTION LIMITED is an established extension buildering business in CM17. We come highly recommended and provide competitive quotes for yo...
From £17,900
Experienced extension builder ready to quote for your work. RICHARD MORRIS (CONSTRUCTION) is the best extension builder in CM17. No obligation free...
From £17,668
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,500
Our building services company Added Space Ltd have over fifty years combined experience. We have been helping customers in Harlow and the surroundi...
From £17,556
With over 20 years of experience we specialise in fit-outs and maximising your living space. Lofts, extensions, basements, new builds and domestic ...
From £20,652
We are small building company working for the residential and domestic properties? We work on all types of buildings creating Loft conversion and H...

Underpinning ranges from £17,340 (Urban lofts and extensions ltd based in cm20) to £20,652 (Essex loft extensions Ltd based in CM20), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in CM17 by posting a job with HaMuch and we will send it to extension builders in CM17.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Harlow | £43 | £288 |
| Underpin A Building near Hoddesdon | £46 | £296 |
| Underpin A Building near Bishop's Stortford | £42 | £264 |
| Underpin A Building near Ware | £47 | £296 |
| Underpin A Building near Epping Forest | £44 | £273 |
| Underpin A Building near Loughton | £44 | £273 |
| Underpin A Building near Cheshunt | £48 | £286 |
| Underpin A Building near Hertford | £46 | £289 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near Romford | £45 | £275 |
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 - £17,924

Two storey extension - £88,636

Build a timber frame extension - £26,424

Build a swimming pool - £81,424

Single storey extension - £63,480

Side return extension - £46,270

Install an RSJ - £2,624

Outbuilding - £10,424

Build a Mansard loft conversion - £52,424

Loft conversion - £37,725

Build a kitchen extension - £42,424

Hip to gable loft conversion - £42,424

Granny annexe - £87,424

Garden office - £10,424

Convert a Garage - £16,424

Garage - £18,924

Build a flat roof extension - £22,424

Build a dormer loft conversion - £42,424

Concrete foundations - £6,674

Convert a bungalow loft - £29,424

Convert a basement - £42,270