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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...
Need to find an Extension Builder near you for all your extension buildering work?
Slick Construction Ltd provides a local, trusted extensi...
From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...
Trusted and professional extension builder in Walton-on-thames. Experienced in all extension buildering work and keeping within budget and on quote...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Image Design & Consultants is a trusted extension builder serving customers in Walton-on-thames and the surrounding area. Contact us to today to ge...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Russell Worcester
R & R Roofing Guildford are here to help customers who need an Extension Builder in Walton-on-thames. We offer a competitive rate to complete all y...
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...

A flat roof extension ranges from the cheapest of £21,896 (Tota Builders based in TW2) 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 Walton-on-thames by posting a job with HaMuch. We'll send it to extension builders in Walton-on-thames.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| 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 Esher | £43 | £274 |
| Build A Flat Roof Extension near West Molesey | £43 | £274 |
| Build A Flat Roof Extension near Sunbury-on-Thames | £43 | £273 |
| Build A Flat Roof Extension near New Haw | £43 | £273 |
| Build A Flat Roof Extension near Richmond Upon Thames | £43 | £274 |
| Build A Flat Roof Extension near Kingston Upon Thames | £43 | £271 |
| Build A Flat Roof Extension near Staines-upon-Thames | £42 | £269 |
| Build A Flat Roof Extension near Hounslow | £43 | £272 |
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 - £17,748

Two storey extension - £88,372

Build a timber frame extension - £26,248

Build a swimming pool - £81,248

Single storey extension - £59,960

Side return extension - £44,290

Install an RSJ - £2,448

Outbuilding - £10,248

Build a Mansard loft conversion - £52,248

Loft conversion - £36,075

Build a kitchen extension - £42,248

Hip to gable loft conversion - £42,248

Granny annexe - £87,248

Garden office - £10,248

Convert a Garage - £16,248

Garage - £18,748

Build a flat roof extension - £22,248

Build a dormer loft conversion - £42,248

Concrete foundations - £6,498

Convert a bungalow loft - £29,248

Convert a basement - £40,290