Relax... you have found a reliable extension builder in OX12. CHF CONSTRUCTION is a friendly and reliable company based in OX12 who consider no job...
From £22,200
WJW Home Improvements - Friendly and professional builders. We specialize in extensions, loft conversions, and big renovation projects. Our motto i...
From £22,224
SH Carpentry and Construction Ltd is a professional, reliable and friendly carpentry, joinery and general construction company working in and aroun...

A flat roof extension ranges from the cheapest of £22,128 (CHF CONSTRUCTION based in OX12) to the dearest of £22,224 (SH Carpentry & Construction Limited based in OX12), 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 OX12 by posting a job with HaMuch. We'll send it to extension builders in OX12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Vale of White Horse | £36 | £271 |
| 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 Oxford | £37 | £261 |
| Build A Flat Roof Extension near Witney | £32 | £244 |
| Build A Flat Roof Extension near Newbury | £37 | £262 |
| Build A Flat Roof Extension near Stratton St Margaret | £32 | £238 |
| Build A Flat Roof Extension near South Oxfordshire | £36 | £253 |
| Build A Flat Roof Extension near Swindon | £31 | £238 |
| Build A Flat Roof Extension near Thatcham | £38 | £266 |
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 - £17,684

Two storey extension - £88,276

Build a timber frame extension - £26,184

Build a swimming pool - £81,184

Single storey extension - £58,680

Side return extension - £43,570

Install an RSJ - £2,384

Outbuilding - £10,184

Build a Mansard loft conversion - £52,184

Loft conversion - £35,475

Build a kitchen extension - £42,184

Hip to gable loft conversion - £42,184

Granny annexe - £87,184

Garden office - £10,184

Convert a Garage - £16,184

Garage - £18,684

Build a flat roof extension - £22,184

Build a dormer loft conversion - £42,184

Concrete foundations - £6,434

Convert a bungalow loft - £29,184

Convert a basement - £39,570