From £17,364
Trusted and professional extension builder in Daventry. Experienced in all extension buildering work and keeping within budget and on quote. R LANG...
From £17,316
Daventry, NN11
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,484
Trusted and professional extension builder in Daventry. Experienced in all extension buildering work and keeping within budget and on quote. BESTBI...
From £17,164
Need to find an Extension Builder near you for all your extension buildering work?
MIDDLEMARCH CONSTRUCTION LTD provides a local, trusted e...
From £17,516
Trusted and professional extension builder in Daventry. Experienced in all extension buildering work and keeping within budget and on quote. P F HO...
From £17,260
Daventry, NN11
Experienced extension builder ready to quote for your work. BODDINGTON CONSTRUCTION is the best extension builder in Daventry. No obligation free q...
From £17,940
AJ DESIGN & BUILD LTD is an established extension buildering business in Daventry. We come highly recommended and provide competitive quotes for yo...
From £17,532
Need an Extension Builder in Daventry? A C SPENCER BUILDERS has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £17,420
JMAC Building Services is a building company, based in Southam, Warwickshire.We carry out all manor of residential building works, from new build c...
From £17,428
GRB Building & Roofing is a trusted extension builder serving customers in Daventry and the surrounding area. Contact us to today to get a competit...

Underpinning ranges from £17,164 (MIDDLEMARCH CONSTRUCTION LTD based in CV23) to £17,940 (AJ DESIGN & BUILD LTD based in NN12), 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 Daventry by posting a job with HaMuch and we will send it to extension builders in Daventry.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Daventry | £31 | £230 |
| Underpin A Building near Rugby | £31 | £224 |
| Underpin A Building near Northampton | £35 | £239 |
| Underpin A Building near Banbury | £33 | £239 |
| Underpin A Building near Leamington Spa | £27 | £212 |
| Underpin A Building near Kenilworth | £29 | £224 |
| Underpin A Building near Warwick | £28 | £213 |
| Underpin A Building near Coventry | £28 | £222 |
| Underpin A Building near Bedworth | £28 | £219 |
| Underpin A Building near Nuneaton & Bedworth | £28 | £219 |
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 - £17,442

Two storey extension - £87,914

Build a timber frame extension - £25,942

Build a swimming pool - £80,942

Single storey extension - £53,848

Side return extension - £40,852

Install an RSJ - £2,142

Outbuilding - £9,942

Build a Mansard loft conversion - £51,942

Loft conversion - £33,210

Build a kitchen extension - £41,942

Hip to gable loft conversion - £41,942

Granny annexe - £86,942

Garden office - £9,942

Convert a Garage - £15,942

Garage - £18,442

Build a flat roof extension - £21,942

Build a dormer loft conversion - £41,942

Concrete foundations - £6,192

Convert a bungalow loft - £28,942

Convert a basement - £36,852