From £17,596
Relax... you have found a reliable extension builder in SG2. GB Build is a friendly and reliable company based in SG2 who consider no job as too bi...
From £17,692
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...
From £17,860
We are a family run business with over 30 years of combined experience, we offer everything from replacing doors and worktops on your kitchen to sm...
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 £17,660
Experienced extension builder ready to quote for your work. Precision Roofing & Building Maintenance is the best extension builder in SG2. No oblig...
From £17,772
Harris Building Solutions Limited is an established extension buildering business in SG2. We come highly recommended and provide competitive quotes...
From £18,004
WALKERN CONSTRUCTION LIMITED is an established and experienced local extension builder in SG2. Please contact us for a free, no obligation quote an...
From £17,668
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,516
Experienced extension builder ready to quote for your work. G B BUILDSTORE LTD is the best extension builder in SG2. No obligation free quotes and ...
From £17,444
Ross Taylor Homes is an established extension buildering business in SG2. We come highly recommended and provide competitive quotes for your work.<...

Underpinning ranges from £17,444 (Ross Taylor Homes based in SG3) to £18,004 (WALKERN CONSTRUCTION LIMITED based in SG2), 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 SG2 by posting a job with HaMuch and we will send it to extension builders in SG2.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Stevenage | £44 | £282 |
| Underpin A Building near Hitchin | £43 | £283 |
| Underpin A Building near North Hertfordshire | £44 | £283 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near Letchworth | £44 | £283 |
| Underpin A Building near Welwyn Garden City | £42 | £268 |
| Underpin A Building near Hertford | £46 | £289 |
| Underpin A Building near Ware | £47 | £296 |
| Underpin A Building near Harpenden | £86 | £315 |
| Underpin A Building near Hatfield | £64 | £283 |
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 - £17,694

Two storey extension - £88,292

Build a timber frame extension - £26,194

Build a swimming pool - £81,194

Single storey extension - £58,888

Side return extension - £43,687

Install an RSJ - £2,394

Outbuilding - £10,194

Build a Mansard loft conversion - £52,194

Loft conversion - £35,573

Build a kitchen extension - £42,194

Hip to gable loft conversion - £42,194

Granny annexe - £87,194

Garden office - £10,194

Convert a Garage - £16,194

Garage - £18,694

Build a flat roof extension - £22,194

Build a dormer loft conversion - £42,194

Concrete foundations - £6,444

Convert a bungalow loft - £29,194

Convert a basement - £39,687