From £17,628
Relax... you have found a reliable extension builder in OX9. Trew Builders is a friendly and reliable company based in OX9 who consider no job as t...
From £17,668
Platinum Build Ltd are here to help customers who need an Extension Builder in OX9. We offer a competitive rate to complete all your extension buil...
From £17,780
Trusted and professional extension builder in OX9. Experienced in all extension buildering work and keeping within budget and on quote. BUILDRIGHT ...
From £17,708
Maha Khaliq Design is an established and experienced local extension builder in OX9. Please contact us for a free, no obligation quote and competit...
From £17,380
Trusted and professional extension builder in OX9. Experienced in all extension buildering work and keeping within budget and on quote. PERNA CONST...
From £17,380
Relax... you have found a reliable extension builder in OX9. JOHN BURDER CONSTRUCTION LIMIT is a friendly and reliable company based in OX9 who con...
From £17,460
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,852
Draisey is an established extension buildering business in OX9. We come highly recommended and provide competitive quotes for your work.
From £17,468
Hammond Construction is a family owned building, refurbishment and electrical services company who can help you achieve the home of your dreams…
From £17,404
Relax... you have found a reliable extension builder in OX9. Nicola Scannell Design and Property is a friendly and reliable company based in OX9 wh...

Underpinning ranges from £17,380 (PERNA CONSTRUCTION LTD based in OX49) to £17,852 (Draisey based in ox33), 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 OX9 by posting a job with HaMuch and we will send it to extension builders in OX9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near South Oxfordshire | £36 | £253 |
| Underpin A Building near Aylesbury | £42 | £270 |
| Underpin A Building near Wycombe | £39 | £271 |
| Underpin A Building near Aylesbury Vale | £36 | £246 |
| Underpin A Building near High Wycombe | £39 | £272 |
| Underpin A Building near Oxford | £37 | £263 |
| Underpin A Building near Hazlemere | £40 | £272 |
| Underpin A Building near Bicester | £35 | £249 |
| Underpin A Building near Abingdon-on-Thames | £35 | £258 |
| Underpin A Building near Cherwell | £35 | £249 |
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 - £17,573

Two storey extension - £88,109

Build a timber frame extension - £26,073

Build a swimming pool - £81,073

Single storey extension - £56,456

Side return extension - £42,319

Install an RSJ - £2,273

Outbuilding - £10,073

Build a Mansard loft conversion - £52,073

Loft conversion - £34,433

Build a kitchen extension - £42,073

Hip to gable loft conversion - £42,073

Granny annexe - £87,073

Garden office - £10,073

Convert a Garage - £16,073

Garage - £18,573

Build a flat roof extension - £22,073

Build a dormer loft conversion - £42,073

Concrete foundations - £6,323

Convert a bungalow loft - £29,073

Convert a basement - £38,319