From £17,644
Experienced extension builder ready to quote for your work. WOODMOOR CONSTRUCTION is the best extension builder in SO32. No obligation free quotes ...
From £17,580
Darren Hitchins T/A The Honest Builder is an established extension buildering business in SO32. We come highly recommended and provide competitive ...
From £17,588
Sterling International Construction Ltd is a trusted extension builder serving customers in SO32 and the surrounding area. Contact us to today to g...
From £17,636
Experienced extension builder ready to quote for your work. Artisan Builders is the best extension builder in SO32. No obligation free quotes and m...
From £17,236
Relax... you have found a reliable extension builder in SO32. Property Maintenance Repair is a friendly and reliable company based in SO32 who cons...
From £17,212
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,284
NICK SMITH BUILDERS is an established extension buildering business in SO32. We come highly recommended and provide competitive quotes for your wor...
From £17,404
We provide the ideal solution for awkward or unusual shaped windows as it can be made to perfectly fit almost any form, from arched to hexagonal or...
From £17,612
Experienced extension builder ready to quote for your work. Chris Buttler Builders is the best extension builder in SO32. No obligation free quotes...
From £17,540
Experienced extension builder ready to quote for your work. The Classic Barn Company is the best extension builder in SO32. No obligation free quot...

Underpinning ranges from £17,212 (The Fascia Division Limited based in SO50) to £17,644 (WOODMOOR CONSTRUCTION based in SO32), 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 SO32 by posting a job with HaMuch and we will send it to extension builders in SO32.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Hedge End | £34 | £244 |
| Underpin A Building near Fareham | £35 | £250 |
| Underpin A Building near Locks Heath | £33 | £240 |
| Underpin A Building near Eastleigh | £34 | £244 |
| Underpin A Building near Chandler's Ford | £34 | £245 |
| Underpin A Building near Waterlooville | £36 | £250 |
| Underpin A Building near Horndean | £35 | £253 |
| Underpin A Building near Southampton | £34 | £243 |
| Underpin A Building near Winchester | £37 | £266 |
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
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 - £17,474

Two storey extension - £87,960

Build a timber frame extension - £25,974

Build a swimming pool - £80,974

Single storey extension - £54,472

Side return extension - £41,203

Install an RSJ - £2,174

Outbuilding - £9,974

Build a Mansard loft conversion - £51,974

Loft conversion - £33,503

Build a kitchen extension - £41,974

Hip to gable loft conversion - £41,974

Granny annexe - £86,974

Garden office - £9,974

Convert a Garage - £15,974

Garage - £18,474

Build a flat roof extension - £21,974

Build a dormer loft conversion - £41,974

Concrete foundations - £6,224

Convert a bungalow loft - £28,974

Convert a basement - £37,203