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Russell Worcester
R & R Roofing Guildford are here to help customers who need an Extension Builder in Knaphill. We offer a competitive rate to complete all your exte...
From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...
Relax... you have found a reliable extension builder in Knaphill. K & J Builders & Decorators is a friendly and reliable company based in Knaphill ...
Kendall Construction is an established and experienced local extension builder in Knaphill. Please contact us for a free, no obligation quote and c...
Need to find an Extension Builder near you for all your extension buildering work?
Chim Me Sweep Chim Me Build provides a local, trusted ex...
Relax... you have found a reliable extension builder in Knaphill. DILCONSI CONSTRUCTION is a friendly and reliable company based in Knaphill who co...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Cosmin-Adrian Aporcariti
We are a company based in South London, with a strong will to work and to do the best job possible every tine we start a job (big or small) because...
Need to find an Extension Builder near you for all your extension buildering work?
GS Wood Building Services provides a local, trusted exte...
Trusted and professional extension builder in Knaphill. Experienced in all extension buildering work and keeping within budget and on quote. Speedy...

A flat roof extension ranges from the cheapest of £21,760 (We Fix & Upkeep Ltd based in KT16) to the dearest of £22,472 (K & J Builders & Decorators based in GU19), 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 Knaphill by posting a job with HaMuch. We'll send it to extension builders in Knaphill.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Woking | £43 | £277 |
| Build A Flat Roof Extension near New Haw | £43 | £273 |
| Build A Flat Roof Extension near Guildford | £53 | £298 |
| Build A Flat Roof Extension near Ascot | £41 | £276 |
| Build A Flat Roof Extension near Camberley | £40 | £268 |
| Build A Flat Roof Extension near Ash Vale | £41 | £277 |
| Build A Flat Roof Extension near Egham | £42 | £266 |
| Build A Flat Roof Extension near Farnborough | £41 | £272 |
| Build A Flat Roof Extension near Staines-upon-Thames | £42 | £269 |
| Build A Flat Roof Extension near Walton-on-Thames | £43 | £277 |
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 - £17,634

Two storey extension - £88,202

Build a timber frame extension - £26,134

Build a swimming pool - £81,134

Single storey extension - £57,688

Side return extension - £43,012

Install an RSJ - £2,334

Outbuilding - £10,134

Build a Mansard loft conversion - £52,134

Loft conversion - £35,010

Build a kitchen extension - £42,134

Hip to gable loft conversion - £42,134

Granny annexe - £87,134

Garden office - £10,134

Convert a Garage - £16,134

Garage - £18,634

Build a flat roof extension - £22,134

Build a dormer loft conversion - £42,134

Concrete foundations - £6,384

Convert a bungalow loft - £29,134

Convert a basement - £39,012