From £22,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,920
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,864
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,680
Trusted and professional extension builder in SN6. Experienced in all extension buildering work and keeping within budget and on quote. G R & Son h...
From £21,760
Dacol Services is Swindons number 1 property maintenance service.
Trusted by many letting agents, landlords, homeowners, and hoteliers.
From £22,144
BROWNS TOTAL DESIGN & BUILD LTD is an established and experienced local extension builder in SN6. Please contact us for a free, no obligation quote...
From £21,456
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,096
MJ solutions is an established and experienced local extension builder in SN6. Please contact us for a free, no obligation quote and competitive r...
From £22,072
We have a skilled and dedicated team of professional tradesmen to carry out all your requirements. Whether you are looking to build, extend or upgr...
From £21,744
Relax... you have found a reliable extension builder in SN6. Highworth Felt Roofing Limited is a friendly and reliable company based in SN6 who con...

A flat roof extension ranges from the cheapest of £21,456 (Watts Builders based in SN25) to the dearest of £22,288 (Austen Dawson (UK) Ltd based in SN6), 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 SN6 by posting a job with HaMuch. We'll send it to extension builders in SN6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Stratton St Margaret | £37 | £238 |
| Build A Flat Roof Extension near Thamesdown | £38 | £239 |
| Build A Flat Roof Extension near Swindon | £38 | £238 |
| Build A Flat Roof Extension near Vale of White Horse | £36 | £271 |
| Build A Flat Roof Extension near Witney | £32 | £244 |
| Build A Flat Roof Extension near Calne | £29 | £225 |
| 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 West Wiltshire | £32 | £242 |
| Build A Flat Roof Extension near North Wiltshire | £32 | £242 |
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 - £17,402

Two storey extension - £87,854

Build a timber frame extension - £25,902

Build a swimming pool - £80,902

Single storey extension - £53,048

Side return extension - £40,402

Install an RSJ - £2,102

Outbuilding - £9,902

Build a Mansard loft conversion - £51,902

Loft conversion - £32,835

Build a kitchen extension - £41,902

Hip to gable loft conversion - £41,902

Granny annexe - £86,902

Garden office - £9,902

Convert a Garage - £15,902

Garage - £18,402

Build a flat roof extension - £21,902

Build a dormer loft conversion - £41,902

Concrete foundations - £6,152

Convert a bungalow loft - £28,902

Convert a basement - £36,402