From £17,572
Trusted and professional extension builder in Cowes. Experienced in all extension buildering work and keeping within budget and on quote. Custom ha...
From £17,612
'custom is all about ideas, about creating the right space for the right lifestyle, about design, function, environment and installation. above all...
From £17,676
GKW BUILDING+DIY is an established and experienced local extension builder in Cowes. Please contact us for a free, no obligation quote and competit...
From £17,476
Cowes, PO31
Oakland Construction & Maintenance is an established extension buildering business in Cowes. We come highly recommended and provide competitive quo...
From £17,388
Need an Extension Builder in Cowes? DJR CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £17,708
Relax... you have found a reliable extension builder in Cowes. JP HILLMAN CARPTRY & GEN BUILD is a friendly and reliable company based in Cowes who...
From £17,380
P D Builders is an established and experienced local extension builder in Cowes. Please contact us for a free, no obligation quote and competitive ...
From £17,524
Experienced extension builder ready to quote for your work. STONEHAM CONSTRUCTION LIMITED is the best extension builder in Cowes. No obligation fre...
From £17,476
O NEILL CONSTRUCTION LTD is an established extension buildering business in Cowes. We come highly recommended and provide competitive quotes for yo...
From £17,588
Relax... you have found a reliable extension builder in Cowes. BRIAN NEWLYN BUILDERS is a friendly and reliable company based in Cowes who consider...

Underpinning ranges from £17,380 (P D Builders based in PO30) to £17,708 (JP HILLMAN CARPTRY & GEN BUILD based in PO30), 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 Cowes by posting a job with HaMuch and we will send it to extension builders in Cowes.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Isle of Wight | £34 | £246 |
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
| Underpin A Building near Gosport | £35 | £246 |
| Underpin A Building near Locks Heath | £33 | £240 |
| Underpin A Building near Fareham | £35 | £250 |
| Underpin A Building near Portsmouth | £36 | £250 |
| Underpin A Building near Hedge End | £34 | £244 |
| Underpin A Building near Southampton | £34 | £243 |
| Underpin A Building near Totton | £34 | £243 |
| Underpin A Building near Eastleigh | £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 - £17,540

Two storey extension - £88,060

Build a timber frame extension - £26,040

Build a swimming pool - £81,040

Single storey extension - £55,800

Side return extension - £41,950

Install an RSJ - £2,240

Outbuilding - £10,040

Build a Mansard loft conversion - £52,040

Loft conversion - £34,125

Build a kitchen extension - £42,040

Hip to gable loft conversion - £42,040

Granny annexe - £87,040

Garden office - £10,040

Convert a Garage - £16,040

Garage - £18,540

Build a flat roof extension - £22,040

Build a dormer loft conversion - £42,040

Concrete foundations - £6,290

Convert a bungalow loft - £29,040

Convert a basement - £37,950