How HaMuch saves you money
Post your job for free
We send your job to ALL W11 extension builders
Compare quotes
Available extension builders in W11 reply
Save Money
Select your affordable W11 extension builder
Post your job
Mr
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in W11. No obligation free quotes and many happy custo...
"Side return extension" - NW10, job posted 14/08/25
BPS Building
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Loft conversion" - W12, job posted 21/04/25
1st & 2nd Fix Vasconstruct
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
"Loft conversion" - W12, job posted 20/04/25
M & A UK Ltd
Relax... you have found a reliable extension builder in W11. M & A UK Ltd is a friendly and reliable company based in W11 who consider no job as to...
"Loft conversion" - W12, job posted 23/10/24
Newpark Construction
Newpark Construction are here to help customers who need an Extension Builder in W11. We offer a competitive rate to complete all your extension bu...
"Flat roof extension for a period mews terraced house. We'd like a bedroom extension with full bathroom and a roof top terrace. Footprint is roughly 8.5m x 6m." - W6, job posted 06/10/24
HUGHES BUILDERS
Experienced extension builder ready to quote for your work. HUGHES BUILDERS is the best extension builder in W11. No obligation free quotes and man...
"Mansard loft conversion" - SHEPHERD'S BUSH, job posted 26/09/24
Heaven Sent Construction
Need to find an Extension Builder near you for all your extension buildering work?
Heaven Sent Construction provides a local, trusted exten...
H G Builders
H G Builders is an established and experienced local extension builder in W11. Please contact us for a free, no obligation quote and competitive ra...
Graham Construction
Graham Construction is an established extension buildering business in W11. We come highly recommended and provide competitive quotes for your work...
JNJ Building Services Ltd
Experienced extension builder ready to quote for your work. JNJ Building Services Ltd is the best extension builder in W11. No obligation free quot...
TELEMARK CONSTRUCTION LTD
TELEMARK CONSTRUCTION LTD is a trusted extension builder serving customers in W11 and the surrounding area. Contact us to today to get a competitiv...
SDM Services
SDM Services is an established extension buildering business in W11. 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 W11. Experienced in all extension buildering work and keeping within budget and on quote. Hartley Lim...
£48/hr
£299/day
Darlo Ltd
Darlo Ltd has over 20 years of constructing, refurbishing and transforming buildings for home-owners and commercial clients. We offer a one stop so...
£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...
£49/hr
£304/day
Clay Design & Build
Welcome to Clay. We’re a design and build atelier dedicated to transforming our clients’ spaces. Through a bespoke approach, we create designs ...
£45/hr
£282/day
Vyas Design
Need to find an Extension Builder near you for all your extension buildering work?
Vyas Design provides a local, trusted extension builderi...
£41/hr
£253/day
FrontierstroyUK
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£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 ...
Quickly find an Extension Builder in W11
Use these steps to find Extension Builders in W11 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in W11. We’ll notify you via text or email when an Extension Builder is available to quote.
- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local W11 Extension Builders or phone them directly - you’re in control!
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 - £26,224
Garden office - £10,224
Granny annexe - £87,224
Build a flat roof extension - £22,224
Convert a Garage - £16,224
Hip to gable loft conversion - £42,224
Convert a bungalow loft - £29,224
Build a dormer loft conversion - £42,224
Build a swimming pool - £81,224
Build a Mansard loft conversion - £52,224
Concrete foundations - £6,474
Underpin a building - £17,724
Two storey extension - £88,336
Convert a basement - £40,020
Side return extension - £44,020
Loft conversion - £35,850
Garage - £18,724
Single storey extension - £59,480
Outbuilding - £10,224
Install an RSJ - £2,424
Build a kitchen extension - £42,224
People in W11 searching for a Extension Builder also viewed...
The Largest Database of UK Trade Rates
At HaMuch we know what tradespeople charge because we have the largest database of rates anywhere in the UK. If you want quotes for jobs at the right price for you, post your jobs with HaMuch and get your home improvements kickstarted straight away!