Relax... you have found a reliable extension builder in SA4. Signature Project Solutions Ltd is a friendly and reliable company based in SA4 who co...
Andy Power
Worked in building all my working life.
Worked as a builder 30 plus year's.
Am a hands on builder. Have built hou...
From £17,244
L2 Construction Limited is an established and experienced local extension builder in SA4. Please contact us for a free, no obligation quote and com...
From £17,348
Rowan Evans Building Contractors is an established extension buildering business in SA4. We come highly recommended and provide competitive quotes ...
From £17,172
Custom Build Construction are here to help customers who need an Extension Builder in SA4. We offer a competitive rate to complete all your extensi...
From £17,132
Building Service Controls Ltd is an established and experienced local extension builder in SA4. Please contact us for a free, no obligation quote a...

Underpinning ranges from £17,132 (Building Service Controls Ltd based in SA5) to £17,580 (Apex Building Services based in SA4), 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 SA4 by posting a job with HaMuch and we will send it to extension builders in SA4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Gorseinon | £29 | £228 |
| Underpin A Building near Llanelli | £29 | £231 |
| Underpin A Building near Swansea | £29 | £229 |
| Underpin A Building near Neath | £30 | £225 |
| Underpin A Building near Port Talbot | £31 | £227 |
| Underpin A Building near Neath Port Talbot | £31 | £224 |
| Underpin A Building near Carmarthen | £26 | £205 |
| Underpin A Building near Carmarthenshire | £26 | £205 |
| Underpin A Building near Maesteg | £38 | £283 |
| Underpin A Building near Pyle | £34 | £262 |
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 - £17,332

Two storey extension - £87,748

Build a timber frame extension - £25,832

Build a swimming pool - £80,832

Single storey extension - £51,640

Side return extension - £39,610

Install an RSJ - £2,032

Outbuilding - £9,832

Build a Mansard loft conversion - £51,832

Loft conversion - £32,175

Build a kitchen extension - £41,832

Hip to gable loft conversion - £41,832

Granny annexe - £86,832

Garden office - £9,832

Convert a Garage - £15,832

Garage - £18,332

Build a flat roof extension - £21,832

Build a dormer loft conversion - £41,832

Concrete foundations - £6,082

Convert a bungalow loft - £28,832

Convert a basement - £35,610