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Pulton Properties
Trusted and professional extension builder in KT8. Experienced in all extension buildering work and keeping within budget and on quote. Pulton Prop...
Power Bespoke Building Limited
Power Bespoke Building Limited is an established extension buildering business in KT8. We come highly recommended and provide competitive quotes fo...
D GAFFNEY D G BUILDERS & CO
Need to find an Extension Builder near you for all your extension buildering work?
D GAFFNEY D G BUILDERS & CO provides a local, trusted ex...
MAGNAT KITCHENS LTD
Tomasz Oszajca
Trusted and professional extension builder in KT8. Experienced in all extension buildering work and keeping within budget and on quote. MAGNAT KITC...
From £35,700
G.M Dowling & Son
With over 50 years experience, G.M. Dowling & Son offer the highest standard in building services.The family run business, headed up by father and ...
From £34,500
H Vincent Roofing & New UPVC
Need an Extension Builder in KT8? H Vincent Roofing & New UPVC has been helping local clients (10 mile radius) with their extension buildering jobs...
From £37,575
Curtis Conversions Ltd
Curtis Conversions Ltd is an established and experienced local extension builder in KT8. Please contact us for a free, no obligation quote and comp...
From £33,450
Built in Time Developments Ltd
Robert Ceausu
Need to find an Extension Builder near you for all your extension buildering work?
Built in Time Developments Ltd provides a local, trusted...
From £33,525
Blue Ribbon Construction
Trusted and professional extension builder in KT8. Experienced in all extension buildering work and keeping within budget and on quote. Blue Ribbon...
From £33,075
REED CONSTRUCTION LTD
Relax... you have found a reliable extension builder in KT8. REED CONSTRUCTION LTD is a friendly and reliable company based in KT8 who consider no ...
Cheapest builders for loft conversion in KT8
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 KT8 by posting your job to extension builders in KT8.
"Loft conversion of a small 3 bed end of terrace. Currently gang nail truss. Ending up with 3 velux to the front and a pitched dormer to the rear. Architect and engineer plans available." - WEST MOLESEY, job posted 09/08/25
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Estimates for common extension builder jobs in KT8;
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 - £17,651
Two storey extension - £88,227
Build a timber frame extension - £26,151
Build a swimming pool - £81,151
Single storey extension - £58,024
Side return extension - £43,201
Install an RSJ - £2,351
Outbuilding - £10,151
Build a Mansard loft conversion - £52,151
Loft conversion - £35,168
Build a kitchen extension - £42,151
Hip to gable loft conversion - £42,151
Granny annexe - £87,151
Garden office - £10,151
Convert a Garage - £16,151
Garage - £18,651
Build a flat roof extension - £22,151
Build a dormer loft conversion - £42,151
Concrete foundations - £6,401
Convert a bungalow loft - £29,151
Convert a basement - £39,201