From £17,692
Trusted and professional extension builder in SO31. Experienced in all extension buildering work and keeping within budget and on quote. A W PAVING...
From £17,420
We were incorporated in 2015 and have been providing a level of service to our clients that is unparalleled, using knowledge built from 20+ years w...
From £17,460
ROB DINE CONSTRUCTION is an established and experienced local extension builder in SO31. Please contact us for a free, no obligation quote and comp...
From £17,620
Need to find an Extension Builder near you for all your extension buildering work?
Mobile Services provides a local, trusted extension buil...
From £17,636
Claytons Building and Roofing are here to help customers who need an Extension Builder in SO31. We offer a competitive rate to complete all your ex...
From £17,468
Trusted and professional extension builder in SO31. Experienced in all extension buildering work and keeping within budget and on quote. Andy's Bui...
From £17,284
NICK SMITH BUILDERS is an established extension buildering business in SO31. We come highly recommended and provide competitive quotes for your wor...
From £17,540
Been in the trade for over 30 yrs and take pride in my work. Fully insured and references both trade and private available
From £17,476
O NEILL CONSTRUCTION LTD is an established extension buildering business in SO31. We come highly recommended and provide competitive quotes for you...
From £17,252
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,252 (Steve Lovett Builders based in SO18) to £17,692 (A W PAVING LTD based in SO31), 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 SO31 by posting a job with HaMuch and we will send it to extension builders in SO31.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Locks Heath | £30 | £213 |
| Underpin A Building near Hedge End | £30 | £215 |
| Underpin A Building near Fareham | £31 | £217 |
| Underpin A Building near Southampton | £30 | £215 |
| Underpin A Building near Lee-on-the-Solent | £31 | £217 |
| Underpin A Building near Eastleigh | £30 | £215 |
| Underpin A Building near Gosport | £30 | £215 |
| Underpin A Building near Chandler's Ford | £30 | £216 |
| Underpin A Building near Totton | £30 | £216 |
| Underpin A Building near Portsmouth | £31 | £216 |
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 - £17,485

Two storey extension - £87,977

Build a timber frame extension - £25,985

Build a swimming pool - £80,985

Single storey extension - £54,696

Side return extension - £41,329

Install an RSJ - £2,185

Outbuilding - £9,985

Build a Mansard loft conversion - £51,985

Loft conversion - £33,608

Build a kitchen extension - £41,985

Hip to gable loft conversion - £41,985

Granny annexe - £86,985

Garden office - £9,985

Convert a Garage - £15,985

Garage - £18,485

Build a flat roof extension - £21,985

Build a dormer loft conversion - £41,985

Concrete foundations - £6,235

Convert a bungalow loft - £28,985

Convert a basement - £37,329