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Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
Jatinder Kahlon
Hi, I’m Jatinder. I’m a qualified electrician and gas safe registered professional with 10 years of experience in the trade. We specialise in l...
From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...
Lead by designer Richard Gordon, GDC is a London and Berkshire based Design & Build firm with a vast amount of experience in both the residential a...
Russell Worcester
R & R Roofing Guildford are here to help customers who need an Extension Builder in Addlestone. We offer a competitive rate to complete all your ex...
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 Addlestone. DILCONSI CONSTRUCTION is a friendly and reliable company based in Addlestone wh...
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...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
GS Wood Building Services provides a local, trusted exte...

A flat roof extension ranges from the cheapest of £21,760 (We Fix & Upkeep Ltd based in KT16) to the dearest of £22,800 (OAK HOUSE BESPOKE BUILDERS based in KT9), 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 Addlestone by posting a job with HaMuch. We'll send it to extension builders in Addlestone.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near New Haw | £43 | £273 |
| Build A Flat Roof Extension near Walton-on-Thames | £43 | £277 |
| Build A Flat Roof Extension near Elmbridge | £44 | £278 |
| Build A Flat Roof Extension near Woking | £43 | £277 |
| Build A Flat Roof Extension near Staines-upon-Thames | £42 | £269 |
| Build A Flat Roof Extension near Sunbury-on-Thames | £43 | £273 |
| Build A Flat Roof Extension near Egham | £42 | £266 |
| Build A Flat Roof Extension near Esher | £43 | £274 |
| Build A Flat Roof Extension near West Molesey | £43 | £274 |
| Build A Flat Roof Extension near Ascot | £41 | £276 |
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 - £17,705

Two storey extension - £88,307

Build a timber frame extension - £26,205

Build a swimming pool - £81,205

Single storey extension - £59,096

Side return extension - £43,804

Install an RSJ - £2,405

Outbuilding - £10,205

Build a Mansard loft conversion - £52,205

Loft conversion - £35,670

Build a kitchen extension - £42,205

Hip to gable loft conversion - £42,205

Granny annexe - £87,205

Garden office - £10,205

Convert a Garage - £16,205

Garage - £18,705

Build a flat roof extension - £22,205

Build a dormer loft conversion - £42,205

Concrete foundations - £6,455

Convert a bungalow loft - £29,205

Convert a basement - £39,804