From £17,116
Need to find an Extension Builder near you for all your extension buildering work?
Max Sandford & San provides a local, trusted extension b...
From £17,348
Need an Extension Builder in Narberth? Graham & Co Home Improvement Specialists has been helping local clients (20 mile radius) with their extensio...
From £16,932
Trusted and professional extension builder in Narberth. Experienced in all extension buildering work and keeping within budget and on quote. Lawton...
From £17,236
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,684
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,820
Relax... you have found a reliable extension builder in Narberth. D&O Construction Ltd is a friendly and reliable company based in Narberth who con...
From £16,716
Experienced extension builder ready to quote for your work. Gainzy Builders is the best extension builder in Narberth. No obligation free quotes an...
From £17,436
Need to find an Extension Builder near you for all your extension buildering work?
N Morgans & Son Ltd provides a local, trusted extension ...
From £17,204
Experienced extension builder ready to quote for your work. WW BUILDERS is the best extension builder in Narberth. No obligation free quotes and m...

Underpinning ranges from £16,684 (Cleaning Services - We Can Do It based in SA73) to £17,436 (N Morgans & Son Ltd based in SA33), 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 Narberth by posting a job with HaMuch and we will send it to extension builders in Narberth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pembrokeshire | £19 | £163 |
| Underpin A Building near Milford Haven | £18 | £159 |
| Underpin A Building near Carmarthenshire | £26 | £205 |
| Underpin A Building near Carmarthen | £26 | £205 |
| Underpin A Building near Llanelli | £29 | £231 |
| Underpin A Building near Gorseinon | £29 | £228 |
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 - £17,022

Two storey extension - £87,282

Build a timber frame extension - £25,522

Build a swimming pool - £80,522

Single storey extension - £45,432

Side return extension - £36,118

Install an RSJ - £1,722

Outbuilding - £9,522

Build a Mansard loft conversion - £51,522

Loft conversion - £29,265

Build a kitchen extension - £41,522

Hip to gable loft conversion - £41,522

Granny annexe - £86,522

Garden office - £9,522

Convert a Garage - £15,522

Garage - £18,022

Build a flat roof extension - £21,522

Build a dormer loft conversion - £41,522

Concrete foundations - £5,772

Convert a bungalow loft - £28,522

Convert a basement - £32,118