From £17,756
Back to Front Exterior Design Consultancy is a trusted extension builder serving customers in GU9 and the surrounding area. Contact us to today to ...
From £17,700
K Construction is a trusted extension builder serving customers in GU9 and the surrounding area. Contact us to today to get a competitive quote for...
From £17,828
Chapman Property Services is an established and experienced local extension builder in GU9. Please contact us for a free, no obligation quote and c...
From £17,532
Mitchells of Farnham is an established extension buildering business in GU9. We come highly recommended and provide competitive quotes for your wor...
From £17,956
MARSHELS ROOFING CONTRCTS LTD is a trusted extension builder serving customers in GU9 and the surrounding area. Contact us to today to get a compet...
From £17,652
PRESTIGE BUILDCARE LTD is a trusted extension builder serving customers in GU9 and the surrounding area. Contact us to today to get a competitive q...
From £17,428
COOKIE CONSTRUCTION is an established and experienced local extension builder in GU9. Please contact us for a free, no obligation quote and competi...
From £17,628
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,420
MAP Building is an established extension buildering business in GU9. We come highly recommended and provide competitive quotes for your work.
From £17,524
Modern life. Modern interiors.KoolCreations is a Surrey based bespoke interior creation company specialising in creating bespoke interiors using al...

Underpinning ranges from £17,420 (MAP Building based in GU11) to £17,956 (MARSHELS ROOFING CONTRCTS LTD based in GU10), 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 GU9 by posting a job with HaMuch and we will send it to extension builders in GU9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Farnham | £41 | £276 |
| Underpin A Building near Aldershot | £41 | £275 |
| Underpin A Building near Fleet | £41 | £270 |
| Underpin A Building near Ash Vale | £41 | £277 |
| Underpin A Building near Farnborough | £41 | £273 |
| Underpin A Building near Waverley | £68 | £313 |
| Underpin A Building near Camberley | £41 | £283 |
| Underpin A Building near Sandhurst | £41 | £283 |
| Underpin A Building near Guildford | £53 | £298 |
| Underpin A Building near Woking | £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 - £17,642

Two storey extension - £88,214

Build a timber frame extension - £26,142

Build a swimming pool - £81,142

Single storey extension - £57,848

Side return extension - £43,102

Install an RSJ - £2,342

Outbuilding - £10,142

Build a Mansard loft conversion - £52,142

Loft conversion - £35,085

Build a kitchen extension - £42,142

Hip to gable loft conversion - £42,142

Granny annexe - £87,142

Garden office - £10,142

Convert a Garage - £16,142

Garage - £18,642

Build a flat roof extension - £22,142

Build a dormer loft conversion - £42,142

Concrete foundations - £6,392

Convert a bungalow loft - £29,142

Convert a basement - £39,102