From £17,236
Relax... you have found a reliable extension builder in CF71. DEAN THOMAS BUILDING is a friendly and reliable company based in CF71 who consider no...
From £17,284
S J S Services (Wales) Ltd is a trusted extension builder serving customers in CF71 and the surrounding area. Contact us to today to get a competit...
From £17,364
Need an Extension Builder in CF71? SP Property Maintenance has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £17,004
Need to find an Extension Builder near you for all your extension buildering work?
Price Builders provides a local, trusted extension build...
From £17,220
Relax... you have found a reliable extension builder in CF71. WESTGATE BUILDING SERVICES LTD is a friendly and reliable company based in CF71 who c...
From £17,300
Scorpion Windows LTD is a trusted extension builder serving customers in CF71 and the surrounding area. Contact us to today to get a competitive qu...
From £17,564
40 years building and roofing experience.
20 years disabled facilities. Roofing general building, tiling,carpentry.
Val...
From £17,332
Experienced extension builder ready to quote for your work. WH Builders is the best extension builder in CF71. No obligation free quotes and many h...
From £17,556
We only use fully qualified and skilled workers .
We offer value for money with full 12 month guarantee on all work carried out.
From £18,100
Blueprint Construction & Development Ltd is a trusted extension builder serving customers in CF71 and the surrounding area. Contact us to today to ...

Underpinning ranges from £17,004 (Price Builders based in CF71) to £18,100 (Blueprint Construction & Development Ltd based in CF62), 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 CF71 by posting a job with HaMuch and we will send it to extension builders in CF71.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Vale of Glamorgan | £29 | £217 |
| Underpin A Building near Bridgend | £32 | £200 |
| Underpin A Building near Barry | £33 | £218 |
| Underpin A Building near Church Village | £34 | £214 |
| Underpin A Building near Porthcawl | £33 | £252 |
| Underpin A Building near Rhondda | £31 | £206 |
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Pyle | £34 | £262 |
| Underpin A Building near Penarth | £35 | £218 |
| Underpin A Building near Cardiff | £34 | £219 |
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 - £17,396

Two storey extension - £87,844

Build a timber frame extension - £25,896

Build a swimming pool - £80,896

Single storey extension - £52,920

Side return extension - £40,330

Install an RSJ - £2,096

Outbuilding - £9,896

Build a Mansard loft conversion - £51,896

Loft conversion - £32,775

Build a kitchen extension - £41,896

Hip to gable loft conversion - £41,896

Granny annexe - £86,896

Garden office - £9,896

Convert a Garage - £15,896

Garage - £18,396

Build a flat roof extension - £21,896

Build a dormer loft conversion - £41,896

Concrete foundations - £6,146

Convert a bungalow loft - £28,896

Convert a basement - £36,330