Relax... you have found a reliable extension builder in GU18. K & J Builders & Decorators is a friendly and reliable company based in GU18 who cons...
Kendall Construction is an established and experienced local extension builder in GU18. Please contact us for a free, no obligation quote and compe...
Sanctuary Interiors covers Bespoke Bathroom Installations, and Kitchen Installations, small building works, Tiling, Plastering, Painting. Currently...
Experienced extension builder ready to quote for your work. GM Bailey and Sons Ltd is the best extension builder in GU18. No obligation free quotes...
From £22,264
Awb are here to help customers who need an Extension Builder in GU18. We offer a competitive rate to complete all your extension buildering jobs to...
From £22,136
AXA BUILD AND MAINTENANCE is an established extension buildering business in GU18. We come highly recommended and provide competitive quotes for yo...
From £22,288
BRICK CONSTRUCTION is a trusted extension builder serving customers in GU18 and the surrounding area. Contact us to today to get a competitive quot...
From £21,936
BESPOKE BUILDING SOLUTIONS is an established and experienced local extension builder in GU18. Please contact us for a free, no obligation quote and...
From £22,408
Geoff Luggar
Assuring every job undertaken to the highest standard
Member of Which trusted traders
From £21,936
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

A flat roof extension ranges from the cheapest of £21,936 (BESPOKE BUILDING SOLUTIONS based in GU20) 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 GU18 by posting a job with HaMuch. We'll send it to extension builders in GU18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Camberley | £40 | £268 |
| Build A Flat Roof Extension near Ascot | £41 | £276 |
| Build A Flat Roof Extension near Sandhurst | £40 | £268 |
| Build A Flat Roof Extension near Bracknell | £40 | £269 |
| Build A Flat Roof Extension near Farnborough | £41 | £272 |
| Build A Flat Roof Extension near Woking | £43 | £277 |
| Build A Flat Roof Extension near Bracknell Forest | £40 | £270 |
| 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 New Haw | £43 | £273 |
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 - £17,714

Two storey extension - £88,320

Build a timber frame extension - £26,214

Build a swimming pool - £81,214

Single storey extension - £59,272

Side return extension - £43,903

Install an RSJ - £2,414

Outbuilding - £10,214

Build a Mansard loft conversion - £52,214

Loft conversion - £35,753

Build a kitchen extension - £42,214

Hip to gable loft conversion - £42,214

Granny annexe - £87,214

Garden office - £10,214

Convert a Garage - £16,214

Garage - £18,714

Build a flat roof extension - £22,214

Build a dormer loft conversion - £42,214

Concrete foundations - £6,464

Convert a bungalow loft - £29,214

Convert a basement - £39,903