From £17,844
We work closely with our Clients to provide the most suitable procurement route to suit each Client’s requirements and aspirations. We are experi...
From £18,036
We provide structural engineering design and construction service (D&B) Our dedicated, enthusiastic and highly qualified staff to find the appropri...
From £17,532
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,892
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 £17,820
M &M GENERAL BUILDING is an established extension buildering business in GU1. We come highly recommended and provide competitive quotes for your wo...
From £18,636
Paramount Brickwork Limited is an established extension buildering business in GU1. We come highly recommended and provide competitive quotes for y...
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...
From £17,820
Need an Extension Builder in GU1? P J HARDIMAN BUILDING CONTRACT has been helping local clients (20 mile radius) with their extension buildering jo...
From £17,660
Experienced extension builder ready to quote for your work. JD CONSTRUCTION is the best extension builder in GU1. No obligation free quotes and man...
From £17,924
Trusted and professional extension builder in GU1. Experienced in all extension buildering work and keeping within budget and on quote. Chinthurst ...

Underpinning ranges from £17,532 (Elite Roofing and Building based in GU1) to £18,636 (Paramount Brickwork Limited based in GU3), 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 | £273 |
| Underpin A Building near Camberley | £41 | £283 |
| 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 - £17,913

Two storey extension - £88,619

Build a timber frame extension - £26,413

Build a swimming pool - £81,413

Single storey extension - £63,256

Side return extension - £46,144

Install an RSJ - £2,613

Outbuilding - £10,413

Build a Mansard loft conversion - £52,413

Loft conversion - £37,620

Build a kitchen extension - £42,413

Hip to gable loft conversion - £42,413

Granny annexe - £87,413

Garden office - £10,413

Convert a Garage - £16,413

Garage - £18,913

Build a flat roof extension - £22,413

Build a dormer loft conversion - £42,413

Concrete foundations - £6,663

Convert a bungalow loft - £29,413

Convert a basement - £42,144