BP Builders are here to help customers who need an Extension Builder in S20. We offer a competitive rate to complete all your extension buildering ...
Hallamshire Paving is an established and experienced local extension builder in S20. Please contact us for a free, no obligation quote and competit...
Woodtec Joinery is an established extension buildering business in S20. We come highly recommended and provide competitive quotes for your work.
Trusted and professional extension builder in S20. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery...
We are a family run business with 20 years experience.
We take great care and attention to the work we carry out and pride ourselves on ...
Need to find an Extension Builder near you for all your extension buildering work?
A B Building Roofing Services provides a local, trusted ...
Relax... you have found a reliable extension builder in S20. CS Construction & Conversions is a friendly and reliable company based in S20 who cons...
Trusted and professional extension builder in S20. Experienced in all extension buildering work and keeping within budget and on quote. Merebrook C...
Dore Decor are a family run business with over 30 years experience - we offer an extensive range of building services and are able to provide a ful...

A flat roof extension ranges from the cheapest of £21,288 (JON WINDLE CONSTRUCTION based in S17) to the dearest of £22,344 (AMB Joinery & Building Services based in S8), 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 S20 by posting a job with HaMuch. We'll send it to extension builders in S20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Dronfield | £33 | £262 |
| Build A Flat Roof Extension near Sheffield | £32 | £261 |
| Build A Flat Roof Extension near Rotherham | £33 | £257 |
| Build A Flat Roof Extension near Wickersley | £33 | £257 |
| Build A Flat Roof Extension near Chesterfield | £33 | £257 |
| Build A Flat Roof Extension near Worksop | £33 | £265 |
| Build A Flat Roof Extension near Mansfield Woodhouse | £33 | £262 |
| Build A Flat Roof Extension near Forest Town | £33 | £262 |
| Build A Flat Roof Extension near Sutton-in-Ashfield | £33 | £264 |
| Build A Flat Roof Extension near Mansfield | £33 | £261 |
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 - £17,480

Two storey extension - £87,970

Build a timber frame extension - £25,980

Build a swimming pool - £80,980

Single storey extension - £54,600

Side return extension - £41,275

Install an RSJ - £2,180

Outbuilding - £9,980

Build a Mansard loft conversion - £51,980

Loft conversion - £33,563

Build a kitchen extension - £41,980

Hip to gable loft conversion - £41,980

Granny annexe - £86,980

Garden office - £9,980

Convert a Garage - £15,980

Garage - £18,480

Build a flat roof extension - £21,980

Build a dormer loft conversion - £41,980

Concrete foundations - £6,230

Convert a bungalow loft - £28,980

Convert a basement - £37,275