From £17,716
Need an Extension Builder in Egham? Keay Roofing Services Ltd has been helping local clients (10 mile radius) with their extension buildering jobs ...
From £17,660
Eg, TW20
EGPM LTD are here to help customers who need an Extension Builder in Egham. We offer a competitive rate to complete all your extension buildering j...
From £17,964
Kandy Build and Construction Ltd is an established extension buildering business in Egham. We come highly recommended and provide competitive quote...
From £17,932
ALPHA OMEGA BUILD LTD are here to help customers who need an Extension Builder in Egham. We offer a competitive rate to complete all your extension...
From £17,812
From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...
From £17,556
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,596
We have over 15 years of experience in the building trade. We are a small family run business and pride ourselves on our exceptional customer servi...
From £17,732
Need an Extension Builder in Egham? ABCXYZ has been helping local clients (10 mile radius) with their extension buildering jobs for many years. Get...
From £17,756
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,940
Lead by designer Richard Gordon, GDC is a London and Berkshire based Design & Build firm with a vast amount of experience in both the residential a...

Underpinning ranges from £17,556 (Deep Builders Ltd based in TW18) to £17,964 (Kandy Build and Construction Ltd based in TW20), 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 Egham by posting a job with HaMuch and we will send it to extension builders in Egham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Egham | £42 | £266 |
| Underpin A Building near Staines-upon-Thames | £42 | £269 |
| Underpin A Building near Windsor | £41 | £271 |
| Underpin A Building near Windsor & Maidenhead | £42 | £272 |
| Underpin A Building near Ascot | £41 | £276 |
| Underpin A Building near New Haw | £43 | £273 |
| Underpin A Building near Sunbury-on-Thames | £42 | £279 |
| Underpin A Building near Slough | £42 | £272 |
| Underpin A Building near Walton-on-Thames | £43 | £276 |
| Underpin A Building near Elmbridge | £43 | £277 |
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 - £17,766

Two storey extension - £88,400

Build a timber frame extension - £26,266

Build a swimming pool - £81,266

Single storey extension - £60,328

Side return extension - £44,497

Install an RSJ - £2,466

Outbuilding - £10,266

Build a Mansard loft conversion - £52,266

Loft conversion - £36,248

Build a kitchen extension - £42,266

Hip to gable loft conversion - £42,266

Granny annexe - £87,266

Garden office - £10,266

Convert a Garage - £16,266

Garage - £18,766

Build a flat roof extension - £22,266

Build a dormer loft conversion - £42,266

Concrete foundations - £6,516

Convert a bungalow loft - £29,266

Convert a basement - £40,497