From £86,784
ADVANCED BUILDING CONCEPTS is an established and experienced local extension builder in OX17. Please contact us for a free, no obligation quote and...
From £87,152
Haras Building Contractors Ltd is a family run business with over 20 years experience within the building trade. We firmly believe in and work from...
From £86,832
CEDAR INTERIORS LIMITED are here to help customers who need an Extension Builder in OX17. We offer a competitive rate to complete all your extensio...
From £86,904
NJM GENERAL BUILDING CONTRACTO is an established and experienced local extension builder in OX17. Please contact us for a free, no obligation quote...
From £86,768
UJ Developments is an established extension buildering business in OX17. We come highly recommended and provide competitive quotes for your work.
From £87,032
Need an Extension Builder in OX17? A C SPENCER BUILDERS has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £86,816
Trusted and professional extension builder in OX17. Experienced in all extension buildering work and keeping within budget and on quote. P GEORGE C...
From £86,880
Caliber Construction Ltd is a trusted extension builder serving customers in OX17 and the surrounding area. Contact us to today to get a competitiv...
From £87,168
Aspis Construction Ltd has been helping customers in Northamptonshire and the surrounding area for a number of years by providing professional, tru...
From £87,080
Richmond Services is an established and experienced local extension builder in OX17. Please contact us for a free, no obligation quote and competit...

Building a granny annexe ranges from £86,768 (UJ Developments based in NN13) to £87,168 (Aspis Construction Ltd based in NN13), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in OX17 by posting a job with HaMuch. We will send it to extension builders in OX17 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Banbury | £33 | £239 |
| Granny Annexe near Daventry | £31 | £230 |
| Granny Annexe near Bicester | £35 | £249 |
| Granny Annexe near Cherwell | £35 | £249 |
| Granny Annexe near Leamington Spa | £27 | £212 |
| Granny Annexe near Warwick | £28 | £213 |
| Granny Annexe near Stratford-on-Avon | £27 | £215 |
| Granny Annexe near Stratford-upon-Avon | £27 | £215 |
| Granny Annexe near Northampton | £35 | £239 |
| Granny Annexe near Rugby | £31 | £224 |
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 - £87,912

Build a timber frame extension - £25,942

Build a swimming pool - £80,942

Single storey extension - £53,832

Side return extension - £40,843

Install an RSJ - £2,142

Outbuilding - £9,942

Build a Mansard loft conversion - £51,942

Loft conversion - £33,203

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 - £36,843