From £17,300
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,332
Diamond Wight Building is an established and experienced local extension builder in PO36. Please contact us for a free, no obligation quote and com...
From £17,548
for a reliable friendly family business catering for the clients wishes.
From £17,524
Experienced extension builder ready to quote for your work. STONEHAM CONSTRUCTION LIMITED is the best extension builder in PO36. No obligation free...
From £17,500
With an interest in architecture and interior design I’ve always enjoyed being creative with RAW materials and building something different.Havin...
From £17,668
MJP Building Services are here to help customers who need an Extension Builder in PO36. We offer a competitive rate to complete all your extension ...
From £17,364
Need to find an Extension Builder near you for all your extension buildering work?
Glenn Millmore provides a local, trusted extension build...
From £17,388
Need an Extension Builder in PO36? DJR CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for many y...

Underpinning ranges from £16,844 (G A Headlam based in PO38) to £17,668 (MJP Building Services based in PO38), 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 PO36 by posting a job with HaMuch and we will send it to extension builders in PO36.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Isle of Wight | £34 | £246 |
| Underpin A Building near Gosport | £35 | £246 |
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
| Underpin A Building near Portsmouth | £36 | £250 |
| Underpin A Building near Fareham | £35 | £250 |
| Underpin A Building near Locks Heath | £33 | £240 |
| Underpin A Building near Havant & Waterloo | £35 | £248 |
| Underpin A Building near Havant | £35 | £249 |
| Underpin A Building near Waterlooville | £36 | £250 |
| Underpin A Building near Horndean | £35 | £253 |
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 - £17,374

Two storey extension - £87,810

Build a timber frame extension - £25,874

Build a swimming pool - £80,874

Single storey extension - £52,472

Side return extension - £40,078

Install an RSJ - £2,074

Outbuilding - £9,874

Build a Mansard loft conversion - £51,874

Loft conversion - £32,565

Build a kitchen extension - £41,874

Hip to gable loft conversion - £41,874

Granny annexe - £86,874

Garden office - £9,874

Convert a Garage - £15,874

Garage - £18,374

Build a flat roof extension - £21,874

Build a dormer loft conversion - £41,874

Concrete foundations - £6,124

Convert a bungalow loft - £28,874

Convert a basement - £36,078