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We are Cognitive Construction, a forward-thinking design & build company.Our houses are our castles and we take great pride in transforming homes a...
Need an Extension Builder in Brackley? A C SPENCER BUILDERS has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £17,316
Trusted and professional extension builder in Brackley. Experienced in all extension buildering work and keeping within budget and on quote. P GEOR...
From £17,284
garry
ADVANCED BUILDING CONCEPTS is an established and experienced local extension builder in Brackley. Please contact us for a free, no obligation quote...
From £17,580
Richmond Services is an established and experienced local extension builder in Brackley. Please contact us for a free, no obligation quote and comp...
From £17,380
Brackley, NN13
Caliber Construction Ltd is a trusted extension builder serving customers in Brackley and the surrounding area. Contact us to today to get a compet...
From £17,668
Brackley, NN13
Aspis Construction Ltd has been helping customers in Northamptonshire and the surrounding area for a number of years by providing professional, tru...
From £17,268
UJ Developments is an established extension buildering business in Brackley. We come highly recommended and provide competitive quotes for your wor...

Underpinning ranges from £17,268 (UJ Developments based in NN13) to £17,668 (Aspis Construction Ltd based in NN13), 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 Brackley by posting a job with HaMuch and we will send it to extension builders in Brackley.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Banbury | £33 | £239 |
| Underpin A Building near Bicester | £35 | £249 |
| Underpin A Building near Cherwell | £35 | £249 |
| Underpin A Building near Aylesbury Vale | £36 | £246 |
| Underpin A Building near Daventry | £31 | £230 |
| Underpin A Building near Milton Keynes | £39 | £263 |
| Underpin A Building near Northampton | £35 | £239 |
| Underpin A Building near Bletchley | £39 | £265 |
| Underpin A Building near Oxford | £38 | £270 |
| 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 - £17,450

Two storey extension - £87,925

Build a timber frame extension - £25,950

Build a swimming pool - £80,950

Single storey extension - £54,000

Side return extension - £40,938

Install an RSJ - £2,150

Outbuilding - £9,950

Build a Mansard loft conversion - £51,950

Loft conversion - £33,281

Build a kitchen extension - £41,950

Hip to gable loft conversion - £41,950

Granny annexe - £86,950

Garden office - £9,950

Convert a Garage - £15,950

Garage - £18,450

Build a flat roof extension - £21,950

Build a dormer loft conversion - £41,950

Concrete foundations - £6,200

Convert a bungalow loft - £28,950

Convert a basement - £36,938