From £17,492
Need to find an Extension Builder near you for all your extension buildering work?
Brian Watts Partners Ltd provides a local, trusted exten...
From £17,380
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,716
Need to find an Extension Builder near you for all your extension buildering work?
BA Knott Oxford Ltd provides a local, trusted extension ...
From £17,692
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,532
CROWN CONSTRUCTION is an established extension buildering business in OX4. We come highly recommended and provide competitive quotes for your work....
From £17,596
Trusted and professional extension builder in OX4. Experienced in all extension buildering work and keeping within budget and on quote. E.N.K. Cons...
From £17,356
Trusted and professional extension builder in OX4. Experienced in all extension buildering work and keeping within budget and on quote. Spatial des...
From £17,724
TNT CONSTRUCTION are here to help customers who need an Extension Builder in OX4. We offer a competitive rate to complete all your extension builde...
From £17,764
MG Property Maintenance & Services is a trusted extension builder serving customers in OX4 and the surrounding area. Contact us to today to get a c...
From £17,452
Trusted and professional extension builder in OX4. Experienced in all extension buildering work and keeping within budget and on quote. Design & Bu...

Underpinning ranges from £17,356 (Spatial design + build based in OX3) to £17,764 (MG Property Maintenance & Services based in OX1), 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 OX4 by posting a job with HaMuch and we will send it to extension builders in OX4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Oxford | £37 | £265 |
| Underpin A Building near Abingdon-on-Thames | £35 | £258 |
| Underpin A Building near South Oxfordshire | £36 | £253 |
| Underpin A Building near Didcot | £36 | £266 |
| Underpin A Building near Cherwell | £35 | £249 |
| Underpin A Building near Bicester | £35 | £249 |
| Underpin A Building near Witney | £32 | £244 |
| Underpin A Building near Vale of White Horse | £36 | £271 |
| Underpin A Building near Aylesbury Vale | £36 | £246 |
| Underpin A Building near Aylesbury | £42 | £270 |
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 - £17,570

Two storey extension - £88,106

Build a timber frame extension - £26,070

Build a swimming pool - £81,070

Single storey extension - £56,408

Side return extension - £42,292

Install an RSJ - £2,270

Outbuilding - £10,070

Build a Mansard loft conversion - £52,070

Loft conversion - £34,410

Build a kitchen extension - £42,070

Hip to gable loft conversion - £42,070

Granny annexe - £87,070

Garden office - £10,070

Convert a Garage - £16,070

Garage - £18,570

Build a flat roof extension - £22,070

Build a dormer loft conversion - £42,070

Concrete foundations - £6,320

Convert a bungalow loft - £29,070

Convert a basement - £38,292