From £17,972
Kendall Construction is an established and experienced local extension builder in GU18. Please contact us for a free, no obligation quote and compe...
From £17,788
BRICK CONSTRUCTION is a trusted extension builder serving customers in GU18 and the surrounding area. Contact us to today to get a competitive quot...
From £17,436
BESPOKE BUILDING SOLUTIONS is an established and experienced local extension builder in GU18. Please contact us for a free, no obligation quote and...
From £17,532
I have been remodelling and restyling homes for over 35 years ; creating amazing spaces to live and making people happy is my passion , my hobby an...
From £17,732
Our highly professional business is named after the incredible grandfather of our company’s founder, Zane. Ron Smale guided Zane into the constru...
From £17,572
Sanctuary Interiors covers Bespoke Bathroom Installations, and Kitchen Installations, small building works, Tiling, Plastering, Painting. Currently...
From £17,652
Experienced extension builder ready to quote for your work. GM Bailey and Sons Ltd is the best extension builder in GU18. No obligation free quotes...
From £17,932
JAMES BURKE GENERAL BUILDING is an established and experienced local extension builder in GU18. Please contact us for a free, no obligation quote a...
From £17,564
Trusted and professional extension builder in GU18. Experienced in all extension buildering work and keeping within budget and on quote. WRIGHT BUI...
From £17,900
HSL BUILDING SERVICES are here to help customers who need an Extension Builder in GU18. We offer a competitive rate to complete all your extension...

Underpinning ranges from £17,436 (BESPOKE BUILDING SOLUTIONS based in GU20) to £17,972 (Kendall Construction based in GU19), 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 GU18 by posting a job with HaMuch and we will send it to extension builders in GU18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Camberley | £41 | £283 |
| Underpin A Building near Ascot | £41 | £276 |
| Underpin A Building near Sandhurst | £41 | £283 |
| Underpin A Building near Bracknell | £41 | £286 |
| Underpin A Building near Farnborough | £41 | £273 |
| Underpin A Building near Woking | £43 | £277 |
| Underpin A Building near Bracknell Forest | £41 | £287 |
| Underpin A Building near Ash Vale | £41 | £277 |
| Underpin A Building near Egham | £42 | £266 |
| Underpin A Building near New Haw | £43 | £273 |
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 - £17,708

Two storey extension - £88,312

Build a timber frame extension - £26,208

Build a swimming pool - £81,208

Single storey extension - £59,160

Side return extension - £43,840

Install an RSJ - £2,408

Outbuilding - £10,208

Build a Mansard loft conversion - £52,208

Loft conversion - £35,700

Build a kitchen extension - £42,208

Hip to gable loft conversion - £42,208

Granny annexe - £87,208

Garden office - £10,208

Convert a Garage - £16,208

Garage - £18,708

Build a flat roof extension - £22,208

Build a dormer loft conversion - £42,208

Concrete foundations - £6,458

Convert a bungalow loft - £29,208

Convert a basement - £39,840