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BELLVIEW BUILDERS LTD
Need to find an Extension Builder near you for all your extension buildering work?
BELLVIEW BUILDERS LTD provides a local, trusted extensio...
"Side return extension" - NW10, job posted 14/08/25
A&J BUILDERS & DECORATORS LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"We have a long list of customers that need only a builder that can fit conservatory. We don’t need supplier. Please contact us if you can help. Thanks" - NW10, job posted 10/07/25
Khetani Builders (UK) Ltd
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in Harlesden. No obligation fre...
"Loft conversion" - W12, job posted 21/04/25
Krystian Wojasiewicz
Krystian Wojasiewicz
Krystian Wojasiewicz is a trusted extension builder serving customers in Harlesden and the surrounding area. Contact us to today to get a competiti...
"Loft conversion" - W12, job posted 20/04/25
GasHeat
Patrick Kelly
Over 20 years experience
Client focussed and driven
Personal planning and completion of work
Warranty ...
"Loft conversion" - W12, job posted 23/10/24
Mr
Jonathan Rimmer
Harlesden London, NW10
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Harlesden. No obligation free quotes and many happy...
"Garage" - W3, job posted 18/06/24
LALI BUILDERS
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
V.S.P
Harlesden, NW10
V.S.P is a trusted extension builder serving customers in Harlesden and the surrounding area. Contact us to today to get a competitive quote for ex...
D Dan Construction
Trusted and professional extension builder in Harlesden. Experienced in all extension buildering work and keeping within budget and on quote. D Dan...
LINE BUILDERS LTD
LINE BUILDERS LTD is an established extension buildering business in Harlesden. We come highly recommended and provide competitive quotes for your ...
Bros Construction Ltd
Experienced extension builder ready to quote for your work. Bros Construction Ltd is the best extension builder in Harlesden. No obligation free qu...
Plum & Bros Loft Ltd
Plum & Bros Loft Ltd is an established extension buildering business in Harlesden. We come highly recommended and provide competitive quotes for yo...
Graham Construction
Graham Construction is an established extension buildering business in Harlesden. We come highly recommended and provide competitive quotes for you...
S HILEY CONSTRUCTION
Need an Extension Builder in Harlesden? S HILEY CONSTRUCTION has been helping local clients (10 mile radius) with their extension buildering jobs f...
SDM Services
SDM Services is an established extension buildering business in Harlesden. We come highly recommended and provide competitive quotes for your work....
£45/hr
£279/day
Pro Fast Build
Pro Fast Build Ltd. is a well established building company specialising in all areas of building work – interior and exterior. We are the best ch...
£45/hr
£279/day
Hartley Limited
Trusted and professional extension builder in Harlesden. Experienced in all extension buildering work and keeping within budget and on quote. Hartl...
£50/hr
£311/day
K & S
At K&S Interiors Ltd, we offer complete interior and exterior specialising in full home or office refurbishment to clients in Kensington, Chelsea a...
£46/hr
£293/day
Staunch And Flow Limited
Staunch and Flow is a small, experienced, and cost-effective London-based plumbing/heating engineering firm. We specialise in kitchen and bathroom ...
£42/hr
£260/day
Ace Engineering Solutions
Harlesden Londonderry, NW10
With over 15 years of experience, we offer expertise in a range of industries and domestic areas. We pride ourselves in delivering our projects to ...
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Local Extension Builders in London Boroughs
Job estimates from extension builders near you
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.
Build a timber frame extension - £26,232
Garden office - £10,232
Granny annexe - £87,232
Build a flat roof extension - £22,232
Convert a Garage - £16,232
Hip to gable loft conversion - £42,232
Convert a bungalow loft - £29,232
Build a dormer loft conversion - £42,232
Build a swimming pool - £81,232
Build a Mansard loft conversion - £52,232
Concrete foundations - £6,482
Underpin a building - £17,732
Two storey extension - £88,348
Convert a basement - £40,110
Side return extension - £44,110
Loft conversion - £35,925
Garage - £18,732
Single storey extension - £59,640
Outbuilding - £10,232
Install an RSJ - £2,432
Build a kitchen extension - £42,232
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