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Select your affordable GU3 extension builder
ADO Builders is a trusted extension builder serving customers in GU3 and the surrounding area. Contact us to today to get a competitive quote for e...
From £18,700
Barnabas Zengo
Member since November 2022
BZ GARDENS specialise in creating and maintaining gardens and outdoor spaces across London, Greater London, Berkshire, Buckinghamshire, Hampshire, ...
Need to find an Extension Builder near you for all your extension buildering work?
ALDER CONSTRUCTION provides a local, trusted extension b...
Patrick Elson
Paramount Brickwork Limited is an established extension buildering business in GU3. We come highly recommended and provide competitive quotes for y...
Kevin Warne
K P WARNE BUILDERS is an established extension buildering business in GU3. 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 £17,764
Awb are here to help customers who need an Extension Builder in GU3. We offer a competitive rate to complete all your extension buildering jobs to ...
From £17,820
M &M GENERAL BUILDING is an established extension buildering business in GU3. 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 ...

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 GU3 by posting a job with HaMuch and we will send it to extension builders in GU3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Guildford | £53 | £298 |
| Underpin A Building near Ash Vale | £41 | £277 |
| Underpin A Building near Woking | £43 | £277 |
| Underpin A Building near Aldershot | £41 | £275 |
| Underpin A Building near Waverley | £68 | £313 |
| Underpin A Building near Farnborough | £41 | £272 |
| Underpin A Building near Farnham | £41 | £276 |
| Underpin A Building near Camberley | £40 | £268 |
| Underpin A Building near Fleet | £41 | £270 |
| 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 - £18,122

Two storey extension - £88,934

Build a timber frame extension - £26,622

Build a swimming pool - £81,622

Single storey extension - £67,448

Side return extension - £48,502

Install an RSJ - £2,822

Outbuilding - £10,622

Build a Mansard loft conversion - £52,622

Loft conversion - £39,585

Build a kitchen extension - £42,622

Hip to gable loft conversion - £42,622

Granny annexe - £87,622

Garden office - £10,622

Convert a Garage - £16,622

Garage - £19,122

Build a flat roof extension - £22,622

Build a dormer loft conversion - £42,622

Concrete foundations - £6,872

Convert a bungalow loft - £29,622

Convert a basement - £44,502