From £59,800
The Orchid Group are here to help customers who need an Extension Builder in Botany Bay. We offer a competitive rate to complete all your extension...
From £59,960
Trusted and professional extension builder in Botany Bay. Experienced in all extension buildering work and keeping within budget and on quote. A & ...
From £54,680
W-G LOFTS have over 25 years experience in the construction industry we are based in ENFIELD covering all surrounding areasWe manage your l...
From £61,880
Need an Extension Builder in Botany Bay? Bzone Builders has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
From £55,960
Firtree Building Services Ltd is a trusted extension builder serving customers in Botany Bay and the surrounding area. Contact us to today to get a...
From £59,480
SweepSmart is an established extension buildering business in Botany Bay. We come highly recommended and provide competitive quotes for your work.<...
From £63,640
Experienced extension builder ready to quote for your work. AL Plumbing & Electrical is the best extension builder in Botany Bay. No obligation fre...
From £58,360
We are focused on delivering high quality loft conversions, house extensions, full or partial house refurbishment, also maximising the full potent...
From £55,800
C. Jenkin Builders Limited is an established extension buildering business in Botany Bay. We come highly recommended and provide competitive quotes...
From £53,080
Need to find an Extension Builder near you for all your extension buildering work?
MULBERRY CONSTRUCTION LTD provides a local, trusted exte...

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 - £17,663

Two storey extension - £88,245

Build a timber frame extension - £26,163

Build a swimming pool - £81,163

Single storey extension - £58,264

Side return extension - £43,336

Install an RSJ - £2,363

Outbuilding - £10,163

Build a Mansard loft conversion - £52,163

Loft conversion - £35,280

Build a kitchen extension - £42,163

Hip to gable loft conversion - £42,163

Granny annexe - £87,163

Garden office - £10,163

Convert a Garage - £16,163

Garage - £18,663

Build a flat roof extension - £22,163

Build a dormer loft conversion - £42,163

Concrete foundations - £6,413

Convert a bungalow loft - £29,163

Convert a basement - £39,336