ADO Builders is a trusted extension builder serving customers in GU1 and the surrounding area. Contact us to today to get a competitive quote for e...
Patrick Elson
Paramount Brickwork Limited is an established extension buildering business in GU1. We come highly recommended and provide competitive quotes for y...
Kevin Warne
K P WARNE BUILDERS is an established extension buildering business in GU1. We come highly recommended and provide competitive quotes for your work....
We provide structural engineering design and construction service (D&B) Our dedicated, enthusiastic and highly qualified staff to find the appropri...
Cannon Build Solutions is a local family-run building firm whose strong reliable reputation has been well established in North-West London and Buck...
From £17,732
Experienced extension builder ready to quote for your work. Arrus Knoble Ltd is the best extension builder in GU1. No obligation free quotes and ma...
From £17,820
M &M GENERAL BUILDING is an established extension buildering business in GU1. We come highly recommended and provide competitive quotes for your wo...
From £20,108
Carl Hancock
With well over a decade of marketing and web design experience working for a variety of tradespeople from cleaners through to builders, Websites 4 ...
From £17,876
Martin Ross
Local business for local people... Established in 1980.....so plenty of local knowledge One man business, honest, reliable, hard working ...
From £17,964
Victorian Roofing & Property Maintenance is an established and experienced local extension builder in GU1. Please contact us for a free, no obligat...

Underpinning ranges from £17,212 (K P WARNE BUILDERS based in GU7) to £20,108 (Websites 4 Trades based in GU7), 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 GU1 by posting a job with HaMuch and we will send it to extension builders in GU1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Guildford | £53 | £298 |
| Underpin A Building near Woking | £43 | £277 |
| Underpin A Building near Ash Vale | £41 | £277 |
| Underpin A Building near Waverley | £68 | £313 |
| Underpin A Building near Aldershot | £41 | £275 |
| Underpin A Building near Great Bookham | £42 | £281 |
| Underpin A Building near New Haw | £43 | £273 |
| Underpin A Building near Farnborough | £41 | £272 |
| Underpin A Building near Camberley | £41 | £282 |
| Underpin A Building near Farnham | £41 | £276 |
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 - £18,073

Two storey extension - £88,859

Build a timber frame extension - £26,573

Build a swimming pool - £81,573

Single storey extension - £66,456

Side return extension - £47,944

Install an RSJ - £2,773

Outbuilding - £10,573

Build a Mansard loft conversion - £52,573

Loft conversion - £39,120

Build a kitchen extension - £42,573

Hip to gable loft conversion - £42,573

Granny annexe - £87,573

Garden office - £10,573

Convert a Garage - £16,573

Garage - £19,073

Build a flat roof extension - £22,573

Build a dormer loft conversion - £42,573

Concrete foundations - £6,823

Convert a bungalow loft - £29,573

Convert a basement - £43,944