From £17,516
Need an Extension Builder in PO2? Buildtech southern Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £17,444
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,316
Architectural services, Design of office ,hotel, transport building,Residential .From Conceptual work to Appication.
From £17,588
Experienced extension builder ready to quote for your work. JM Roofing & Building Services is the best extension builder in PO2. No obligation free...
From £17,468
Experienced extension builder ready to quote for your work. Shepperd Developments is the best extension builder in PO2. No obligation free quotes a...
From £17,284
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,228
Experienced extension builder ready to quote for your work. A G Builders is the best extension builder in PO2. No obligation free quotes and many h...
From £17,300
Need to find an Extension Builder near you for all your extension buildering work?
DC Roofing & Sons Ltd provides a local, trusted extensio...
From £17,324
Relax... you have found a reliable extension builder in PO2. Bribern Property Services is a friendly and reliable company based in PO2 who consider...
From £17,500
Build Light Group is an established and experienced local extension builder in PO2. Please contact us for a free, no obligation quote and competiti...

Underpinning ranges from £17,228 (A G Builders based in PO2) to £17,588 (JM Roofing & Building Services based in PO2), 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 PO2 by posting a job with HaMuch and we will send it to extension builders in PO2.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Portsmouth | £36 | £250 |
| Underpin A Building near Gosport | £35 | £246 |
| Underpin A Building near Havant & Waterloo | £35 | £248 |
| Underpin A Building near Havant | £35 | £249 |
| Underpin A Building near Fareham | £35 | £250 |
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
| Underpin A Building near Waterlooville | £36 | £250 |
| Underpin A Building near Horndean | £35 | £253 |
| Underpin A Building near Locks Heath | £33 | £240 |
| 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 - £17,397

Two storey extension - £87,845

Build a timber frame extension - £25,897

Build a swimming pool - £80,897

Single storey extension - £52,936

Side return extension - £40,339

Install an RSJ - £2,097

Outbuilding - £9,897

Build a Mansard loft conversion - £51,897

Loft conversion - £32,783

Build a kitchen extension - £41,897

Hip to gable loft conversion - £41,897

Granny annexe - £86,897

Garden office - £9,897

Convert a Garage - £15,897

Garage - £18,397

Build a flat roof extension - £21,897

Build a dormer loft conversion - £41,897

Concrete foundations - £6,147

Convert a bungalow loft - £28,897

Convert a basement - £36,339