From £22,264
Oxfordshire, OX1
MG Property Maintenance & Services is a trusted extension builder serving customers in Oxfordshire and the surrounding area. Contact us to today to...
From £21,952
Oxfordshire, OX1
Trusted and professional extension builder in Oxfordshire. Experienced in all extension buildering work and keeping within budget and on quote. Des...
From £22,032
CROWN CONSTRUCTION is an established extension buildering business in Oxfordshire. We come highly recommended and provide competitive quotes for yo...
From £22,344
Oxfordshire, OX2
Trusted and professional extension builder in Oxfordshire. Experienced in all extension buildering work and keeping within budget and on quote. Cra...
From £22,224
TNT CONSTRUCTION are here to help customers who need an Extension Builder in Oxfordshire. We offer a competitive rate to complete all your extensio...
From £20,016
Trusted and professional extension builder in Oxfordshire. Experienced in all extension buildering work and keeping within budget and on quote. Bea...
From £21,856
Oxfordshire, OX3
Trusted and professional extension builder in Oxfordshire. Experienced in all extension buildering work and keeping within budget and on quote. Spa...
From £22,512
Michael E Phillips is an established extension buildering business in Oxfordshire. We come highly recommended and provide competitive quotes for yo...
From £22,192
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,880
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

A flat roof extension ranges from the cheapest of £20,016 (Beaumont Design & Build Ltd based in OX4) to the dearest of £22,512 (Michael E Phillips based in OX2), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Oxfordshire by posting a job with HaMuch. We'll send it to extension builders in Oxfordshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Oxford | £37 | £261 |
| Build A Flat Roof Extension near Abingdon-on-Thames | £35 | £258 |
| Build A Flat Roof Extension near Didcot | £36 | £266 |
| Build A Flat Roof Extension near Witney | £32 | £244 |
| Build A Flat Roof Extension near Cherwell | £35 | £249 |
| Build A Flat Roof Extension near South Oxfordshire | £36 | £253 |
| Build A Flat Roof Extension near Bicester | £35 | £249 |
| Build A Flat Roof Extension near Vale of White Horse | £36 | £271 |
| Build A Flat Roof Extension near Aylesbury Vale | £36 | £246 |
| Build A Flat Roof 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 - £17,427

Two storey extension - £87,891

Build a timber frame extension - £25,927

Build a swimming pool - £80,927

Single storey extension - £53,544

Side return extension - £40,681

Install an RSJ - £2,127

Outbuilding - £9,927

Build a Mansard loft conversion - £51,927

Loft conversion - £33,068

Build a kitchen extension - £41,927

Hip to gable loft conversion - £41,927

Granny annexe - £86,927

Garden office - £9,927

Convert a Garage - £15,927

Garage - £18,427

Build a flat roof extension - £21,927

Build a dormer loft conversion - £41,927

Concrete foundations - £6,177

Convert a bungalow loft - £28,927

Convert a basement - £36,681