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R Tredget & Son
Kent, DA15
R Tredget & Son are here to help customers who need an Extension Builder in DA15. We offer a competitive rate to complete all your extension builde...
HOUSE BUILDING SERVICES LIMITED
Tommy House
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in DA15 and the surrounding area. Contact us to today to get a com...
Lover Build
Lover Build is an established and experienced local extension builder in DA15. Please contact us for a free, no obligation quote and competitive ra...
AMJAC CONSTRUCTION LTD
Need to find an Extension Builder near you for all your extension buildering work?
AMJAC CONSTRUCTION LTD provides a local, trusted extensi...
Pro-Tec Roofing & Building Services Ltd
KENT, DA15
Pro-Tec Roofing & Building Services Ltd is an established and experienced local extension builder in DA15. Please contact us for a free, no obligat...
Neris Building Solutions Ltd.
Neris Building Solutions specialising in building of loft conversions, home extensions and home refurbishments.
Direct Roofing
Sidcup, DA15
Direct Roofing is an established and experienced local extension builder in DA15. Please contact us for a free, no obligation quote and competitive...
PARAMOUNT CONSTRUCTION (UK)
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Altash Building Services
Experienced extension builder ready to quote for your work. Altash Building Services is the best extension builder in DA15. No obligation free quot...
Self employer
Darius Kudzevicius
Trusted and professional extension builder in DA15. Experienced in all extension buildering work and keeping within budget and on quote. Self emplo...
Cheapest builders for loft conversion in DA15
Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in DA15 by posting your job to extension builders in DA15.
"Loft conversion" - DA16, job posted 03/08/26
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Estimates for common extension builder jobs in DA15;
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 - £17,667
Two storey extension - £88,251
Build a timber frame extension - £26,167
Build a swimming pool - £81,167
Single storey extension - £58,344
Side return extension - £43,381
Install an RSJ - £2,367
Outbuilding - £10,167
Build a Mansard loft conversion - £52,167
Loft conversion - £35,318
Build a kitchen extension - £42,167
Hip to gable loft conversion - £42,167
Granny annexe - £87,167
Garden office - £10,167
Convert a Garage - £16,167
Garage - £18,667
Build a flat roof extension - £22,167
Build a dormer loft conversion - £42,167
Concrete foundations - £6,417
Convert a bungalow loft - £29,167
Convert a basement - £39,381