From £17,500
Experienced extension builder ready to quote for your work. Improve Not Move is the best extension builder in SA2. No obligation free quotes and ma...
From £17,516
Relax... you have found a reliable extension builder in SA2. Signature Project Solutions Ltd is a friendly and reliable company based in SA2 who co...
From £17,220
Relax... you have found a reliable extension builder in SA2. MOUNT PLEASENT BUILDING is a friendly and reliable company based in SA2 who consider n...
From £17,132
Building Service Controls Ltd is an established and experienced local extension builder in SA2. Please contact us for a free, no obligation quote a...
From £17,436
24/7 EMERGANCY CALLOUT FOR BLOCKED DRAINS NO CALLOUT FEE
We are a family run business of over 30 years experience in the Swansea and sur...
From £17,396
Fit kitchens and more ltd is an established and experienced local extension builder in SA2. Please contact us for a free, no obligation quote and c...
From £17,500
R.H Damp Proofing are here to help customers who need an Extension Builder in SA2. We offer a competitive rate to complete all your extension build...
From £17,076
Homekare Building Services Ltd is an established and experienced local extension builder in SA2. Please contact us for a free, no obligation quote ...
From £17,244
Local builder services CENTER "I, YOU, WE" CIC. Exterior building work build or repair a path or driveway construct or restore an ...
From £17,212
Trusted and professional extension builder in SA2. Experienced in all extension buildering work and keeping within budget and on quote. Masterbuild...

Underpinning ranges from £17,076 (Homekare Building Services Ltd based in SA5) to £17,516 (Signature Project Solutions Ltd based in SA1), 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 SA2 by posting a job with HaMuch and we will send it to extension builders in SA2.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Swansea | £29 | £229 |
| Underpin A Building near Gorseinon | £29 | £228 |
| Underpin A Building near Llanelli | £29 | £231 |
| 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 Pyle | £34 | £262 |
| Underpin A Building near Maesteg | £38 | £283 |
| Underpin A Building near Porthcawl | £33 | £252 |
| Underpin A Building near Bridgend | £32 | £200 |
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 - £17,323

Two storey extension - £87,735

Build a timber frame extension - £25,823

Build a swimming pool - £80,823

Single storey extension - £51,464

Side return extension - £39,511

Install an RSJ - £2,023

Outbuilding - £9,823

Build a Mansard loft conversion - £51,823

Loft conversion - £32,093

Build a kitchen extension - £41,823

Hip to gable loft conversion - £41,823

Granny annexe - £86,823

Garden office - £9,823

Convert a Garage - £15,823

Garage - £18,323

Build a flat roof extension - £21,823

Build a dormer loft conversion - £41,823

Concrete foundations - £6,073

Convert a bungalow loft - £28,823

Convert a basement - £35,511