The business can carry out all aspects of building work:- single or double storey extensions- kitchen and bathroom installations- p...
Trusted and professional extension builder in OX11. Experienced in all extension buildering work and keeping within budget and on quote. Jigsaw Com...
Martin Patto
Friendly local builder... professional tidy and competitive....
D.Bradbury Property Services are here to help customers who need an Extension Builder in OX11. We offer a competitive rate to complete all your ext...
From £22,120
Bluestones Garden Design Ltd is an established and experienced local extension builder in OX11. Please contact us for a free, no obligation quote a...

A flat roof extension ranges from the cheapest of £21,960 (Threesixfive FM Services Ltd based in OX11) to the dearest of £22,200 (Oxon Construction & Renovation based in OX11), 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 OX11 by posting a job with HaMuch. We'll send it to extension builders in OX11.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Didcot | £36 | £266 |
| Build A Flat Roof Extension near Abingdon-on-Thames | £35 | £258 |
| Build A Flat Roof Extension near South Oxfordshire | £36 | £253 |
| Build A Flat Roof Extension near Vale of White Horse | £36 | £271 |
| Build A Flat Roof Extension near Oxford | £37 | £261 |
| Build A Flat Roof Extension near Newbury | £37 | £262 |
| Build A Flat Roof Extension near Thatcham | £38 | £266 |
| Build A Flat Roof Extension near Caversham | £38 | £265 |
| Build A Flat Roof Extension near Reading | £42 | £266 |
| Build A Flat Roof Extension near Witney | £32 | £244 |
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 - £17,570

Two storey extension - £88,106

Build a timber frame extension - £26,070

Build a swimming pool - £81,070

Single storey extension - £56,408

Side return extension - £42,292

Install an RSJ - £2,270

Outbuilding - £10,070

Build a Mansard loft conversion - £52,070

Loft conversion - £34,410

Build a kitchen extension - £42,070

Hip to gable loft conversion - £42,070

Granny annexe - £87,070

Garden office - £10,070

Convert a Garage - £16,070

Garage - £18,570

Build a flat roof extension - £22,070

Build a dormer loft conversion - £42,070

Concrete foundations - £6,320

Convert a bungalow loft - £29,070

Convert a basement - £38,292