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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 £87,724
Trusted and professional extension builder in Brackley. Experienced in all extension buildering work and keeping within budget and on quote. P GEOR...
From £87,676
garry
ADVANCED BUILDING CONCEPTS is an established and experienced local extension builder in Brackley. Please contact us for a free, no obligation quote...
From £88,120
Richmond Services is an established and experienced local extension builder in Brackley. Please contact us for a free, no obligation quote and comp...
From £87,820
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 £88,252
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 £87,652
UJ Developments is an established extension buildering business in Brackley. We come highly recommended and provide competitive quotes for your wor...

Costs range from £87,652 (UJ Developments based in NN13) to £88,252 (Aspis Construction Ltd based in NN13), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Banbury | £33 | £239 |
| Two Storey Extension near Bicester | £35 | £249 |
| Two Storey Extension near Cherwell | £35 | £249 |
| Two Storey Extension near Aylesbury Vale | £36 | £246 |
| Two Storey Extension near Daventry | £31 | £230 |
| Two Storey Extension near Milton Keynes | £39 | £263 |
| Two Storey Extension near Northampton | £35 | £239 |
| Two Storey Extension near Bletchley | £39 | £265 |
| Two Storey Extension near Oxford | £38 | £270 |
| Two Storey Extension 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