From £17,508
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in PO13 and the surrounding areas. ...
From £18,596
We are a Small Family run business with over 30 years experience in the building trade, Carpentry is my main trade, with NVQ Level 2.
From £17,644
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
From £17,252
Park Building Services Ltd is a trusted extension builder serving customers in PO13 and the surrounding area. Contact us to today to get a competit...
From £17,556
K A Griffin General Builder is an established extension buildering business in PO13. We come highly recommended and provide competitive quotes for ...
From £17,276
Been in the building trade for over 30years .have in that time worked all over the country on many different projects.
Have city &...
From £17,268
TP Developments are here to help customers who need an Extension Builder in PO13. We offer a competitive rate to complete all your extension builde...
From £17,644
Bailey Construction Services are here to help customers who need an Extension Builder in PO13. We offer a competitive rate to complete all your ext...
From £17,252
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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...

Underpinning ranges from £17,252 (Park Building Services Ltd based in PO9) to £18,596 (R&B Property Improvements based in PO9), 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 PO13 by posting a job with HaMuch and we will send it to extension builders in PO13.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
| Underpin A Building near Gosport | £35 | £246 |
| Underpin A Building near Fareham | £35 | £250 |
| Underpin A Building near Portsmouth | £36 | £250 |
| Underpin A Building near Ryde | £34 | £255 |
| Underpin A Building near Locks Heath | £33 | £240 |
| Underpin A Building near Waterlooville | £36 | £250 |
| Underpin A Building near Havant & Waterloo | £35 | £248 |
| Underpin A Building near Havant | £35 | £249 |
| Underpin A Building near Hedge End | £34 | £244 |
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 - £17,562

Two storey extension - £88,092

Build a timber frame extension - £26,062

Build a swimming pool - £81,062

Single storey extension - £56,232

Side return extension - £42,193

Install an RSJ - £2,262

Outbuilding - £10,062

Build a Mansard loft conversion - £52,062

Loft conversion - £34,328

Build a kitchen extension - £42,062

Hip to gable loft conversion - £42,062

Granny annexe - £87,062

Garden office - £10,062

Convert a Garage - £16,062

Garage - £18,562

Build a flat roof extension - £22,062

Build a dormer loft conversion - £42,062

Concrete foundations - £6,312

Convert a bungalow loft - £29,062

Convert a basement - £38,193