From £17,780
Member since August 2026
Relax... you have found a reliable extension builder in Chepping Wycombe. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in...
From £17,692
Need an Extension Builder in Chepping Wycombe? VA Structures has been helping local clients (10 mile radius) with their extension buildering jobs f...
From £17,780
Trusted and professional extension builder in Chepping Wycombe. Experienced in all extension buildering work and keeping within budget and on quote...
From £17,812
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,932
DP Services is a fully insured friendly local company which has been trading since 2002 and delivers high quality building work in domestic extensi...
From £17,804
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
From £17,924
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,420
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £17,932
Krystian Wojasiewicz is a trusted extension builder serving customers in Chepping Wycombe and the surrounding area. Contact us to today to get a co...
From £17,932
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...

Underpinning ranges from £17,420 (Nisup Building Services based in HA8) to £17,932 (DP Services based in RG41), 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 Chepping Wycombe by posting a job with HaMuch and we will send it to extension builders in Chepping Wycombe.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Hazlemere | £40 | £272 |
| Underpin A Building near High Wycombe | £39 | £272 |
| Underpin A Building near Wycombe | £39 | £271 |
| Underpin A Building near Maidenhead | £41 | £273 |
| Underpin A Building near Gerrards Cross | £43 | £282 |
| Underpin A Building near Chesham | £42 | £277 |
| Underpin A Building near Slough | £42 | £272 |
| Underpin A Building near Windsor & Maidenhead | £42 | £272 |
| Underpin A Building near Rickmansworth | £42 | £278 |
| Underpin A Building near Windsor | £41 | £271 |
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 - £17,801

Two storey extension - £88,451

Build a timber frame extension - £26,301

Build a swimming pool - £81,301

Single storey extension - £61,016

Side return extension - £44,884

Install an RSJ - £2,501

Outbuilding - £10,301

Build a Mansard loft conversion - £52,301

Loft conversion - £36,570

Build a kitchen extension - £42,301

Hip to gable loft conversion - £42,301

Granny annexe - £87,301

Garden office - £10,301

Convert a Garage - £16,301

Garage - £18,801

Build a flat roof extension - £22,301

Build a dormer loft conversion - £42,301

Concrete foundations - £6,551

Convert a bungalow loft - £29,301

Convert a basement - £40,884