We send your job to ALL SG4 extension builders
Available extension builders in SG4 reply
Select an affordable extension builder
Trusted and professional extension builder in SG4. Experienced in all extension buildering work and keeping within budget and on quote. Amcell Reno...
Experienced extension builder ready to quote for your work. HB Construction is the best extension builder in SG4. No obligation free quotes and man...
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
Gary Braine
Experienced extension builder ready to quote for your work. G B BUILDSTORE LTD is the best extension builder in SG4. No obligation free quotes and ...
From £17,772
Harris Building Solutions Limited is an established extension buildering business in SG4. We come highly recommended and provide competitive quotes...
From £17,732
We are a local roofing company offering a complete roofing service.We provide one of the most cost effective, reliable roofing services in and ...
From £17,908
M P BUILDING LIMITED is an established and experienced local extension builder in SG4. Please contact us for a free, no obligation quote and compet...
From £17,204
Need an Extension Builder in SG4? L P L Property Services Limited has been helping local clients (20 mile radius) with their extension buildering j...
From £17,820
Totalworth Building Services is an established extension buildering business in SG4. We come highly recommended and provide competitive quotes for ...
From £17,660
Andy N
Experienced extension builder ready to quote for your work. Precision Roofing & Building Maintenance is the best extension builder in SG4. No oblig...

Underpinning ranges from £17,204 (L P L Property Services Limited based in SG5) to £17,908 (M P BUILDING LIMITED based in SG4), 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 SG4 by posting a job with HaMuch and we will send it to extension builders in SG4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Hitchin | £43 | £283 |
| Underpin A Building near Stevenage | £44 | £282 |
| Underpin A Building near North Hertfordshire | £44 | £283 |
| Underpin A Building near Letchworth | £44 | £283 |
| Underpin A Building near Luton | £42 | £279 |
| Underpin A Building near Harpenden | £45 | £282 |
| Underpin A Building near Welwyn Garden City | £42 | £269 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near Mid Bedfordshire | £42 | £276 |
| Underpin A Building near Hertford | £46 | £290 |
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 - £17,683

Two storey extension - £88,275

Build a timber frame extension - £26,183

Build a swimming pool - £81,183

Single storey extension - £58,664

Side return extension - £43,561

Install an RSJ - £2,383

Outbuilding - £10,183

Build a Mansard loft conversion - £52,183

Loft conversion - £35,468

Build a kitchen extension - £42,183

Hip to gable loft conversion - £42,183

Granny annexe - £87,183

Garden office - £10,183

Convert a Garage - £16,183

Garage - £18,683

Build a flat roof extension - £22,183

Build a dormer loft conversion - £42,183

Concrete foundations - £6,433

Convert a bungalow loft - £29,183

Convert a basement - £39,561