From £17,404
Bow Tie Construction is an established and experienced local extension builder in High Wycombe. Please contact us for a free, no obligation quote a...
From £17,820
Trusted and professional extension builder in High Wycombe. Experienced in all extension buildering work and keeping within budget and on quote. Sh...
From £16,796
we supply and install carpets and vinyl flooring, small family business , covering a ten mike radius of high wycombe, with a choose at home sample ...
From £17,588
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,404
Experienced extension builder ready to quote for your work. Wooburn Project Management Ltd is the best extension builder in High Wycombe. No obliga...
From £17,924
Here at S Halls Construction Ltd, we undertake all hard landscaping works. Patios, driveways, fencing and groundworks, we also cover many areas of ...
From £17,804
Relax... you have found a reliable extension builder in High Wycombe. JAMES BUILDERS is a friendly and reliable company based in High Wycombe who c...
From £17,588
Need to find an Extension Builder near you for all your extension buildering work?
PSB Builders Ltd provides a local, trusted extension bui...
From £17,596
Relax... you have found a reliable extension builder in High Wycombe. Building High Wycombe is a friendly and reliable company based in High Wycomb...
From £17,900
Lazor Construction Ltd are here to help customers who need an Extension Builder in High Wycombe. We offer a competitive rate to complete all your e...

Underpinning ranges from £16,796 (Andy's carpets & Vinyl services based in HP12) to £17,924 (S Halls Construction Ltd based in HP13), 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 High Wycombe by posting a job with HaMuch and we will send it to extension builders in High Wycombe.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near High Wycombe | £39 | £272 |
| Underpin A Building near Wycombe | £39 | £271 |
| Underpin A Building near Hazlemere | £40 | £272 |
| Underpin A Building near Maidenhead | £41 | £273 |
| Underpin A Building near Chesham | £42 | £277 |
| Underpin A Building near Gerrards Cross | £43 | £282 |
| Underpin A Building near Slough | £42 | £272 |
| Underpin A Building near Windsor & Maidenhead | £42 | £272 |
| Underpin A Building near Windsor | £41 | £271 |
| Underpin A Building near Rickmansworth | £42 | £278 |
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 - £17,582

Two storey extension - £88,124

Build a timber frame extension - £26,082

Build a swimming pool - £81,082

Single storey extension - £56,648

Side return extension - £42,427

Install an RSJ - £2,282

Outbuilding - £10,082

Build a Mansard loft conversion - £52,082

Loft conversion - £34,523

Build a kitchen extension - £42,082

Hip to gable loft conversion - £42,082

Granny annexe - £87,082

Garden office - £10,082

Convert a Garage - £16,082

Garage - £18,582

Build a flat roof extension - £22,082

Build a dormer loft conversion - £42,082

Concrete foundations - £6,332

Convert a bungalow loft - £29,082

Convert a basement - £38,427