From £17,436
Plumbing, painting exterior, interior, extensions, plastering, skiming, carpeting, Flooring, you can ask us ..
From £19,084
Propello is an established and experienced local extension builder in SG3. Please contact us for a free, no obligation quote and competitive rates...
From £16,956
we are very efficient in our work.and make sure our client is one 100% satisfied with our work.
From £17,956
A.J Builders is an established and experienced local extension builder in SG3. Please contact us for a free, no obligation quote and competitive ra...
From £17,772
Top Notch Tradesmen is an established and experienced local extension builder in SG3. Please contact us for a free, no obligation quote and competi...
From £17,516
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,844
Need to find an Extension Builder near you for all your extension buildering work?
Greg-Bud provides a local, trusted extension buildering ...
From £17,932
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £17,612
JJSR Construction Ltd is an established and experienced local extension builder in SG3. Please contact us for a free, no obligation quote and compe...
From £17,420
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...

Underpinning ranges from £16,956 (Rite Builders based in LU1) to £19,084 (Propello based in E17), 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 SG3 by posting a job with HaMuch and we will send it to extension builders in SG3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Stevenage | £44 | £282 |
| Underpin A Building near Welwyn Garden City | £42 | £268 |
| Underpin A Building near Hertford | £46 | £289 |
| Underpin A Building near Hitchin | £43 | £283 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near North Hertfordshire | £44 | £283 |
| Underpin A Building near Hatfield | £64 | £283 |
| Underpin A Building near Ware | £47 | £296 |
| Underpin A Building near Harpenden | £86 | £315 |
| Underpin A Building near Letchworth | £44 | £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 - £17,753

Two storey extension - £88,379

Build a timber frame extension - £26,253

Build a swimming pool - £81,253

Single storey extension - £60,056

Side return extension - £44,344

Install an RSJ - £2,453

Outbuilding - £10,253

Build a Mansard loft conversion - £52,253

Loft conversion - £36,120

Build a kitchen extension - £42,253

Hip to gable loft conversion - £42,253

Granny annexe - £87,253

Garden office - £10,253

Convert a Garage - £16,253

Garage - £18,753

Build a flat roof extension - £22,253

Build a dormer loft conversion - £42,253

Concrete foundations - £6,503

Convert a bungalow loft - £29,253

Convert a basement - £40,344