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
Brian Oxford
for a reliable friendly family business catering for the clients wishes.

Underpinning ranges from £17,268 (REDOAK HOMES based in PO36) to £17,548 (B W Oxford Builder based in PO35), 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 Ryde | £34 | £255 |
| 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 |
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 - £17,362

Two storey extension - £87,793

Build a timber frame extension - £25,862

Build a swimming pool - £80,862

Single storey extension - £52,240

Side return extension - £39,948

Install an RSJ - £2,062

Outbuilding - £9,862

Build a Mansard loft conversion - £51,862

Loft conversion - £32,456

Build a kitchen extension - £41,862

Hip to gable loft conversion - £41,862

Granny annexe - £86,862

Garden office - £9,862

Convert a Garage - £15,862

Garage - £18,362

Build a flat roof extension - £21,862

Build a dormer loft conversion - £41,862

Concrete foundations - £6,112

Convert a bungalow loft - £28,862

Convert a basement - £35,948