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J&J Building Solutions
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Merton. No obligation free quot...
"For garden extention" - SM5, job posted 23/06/26
J & D Construction
Trusted and professional extension builder in Merton. Experienced in all extension buildering work and keeping within budget and on quote. J & D Co...
"**St George's Hospital Toilets & Washrooms Refurbishment – £450K Opportunity** St George’s University Hospitals NHS Foundation Trust invites bids for the refurbishment of toilets and washrooms at St George’s Hospital, Tooting (SW17 0QT). Total contract value is £450,000. Project runs from..." - SW17, job posted 15/05/25
Langston Builders
Langston Builders is a trusted extension builder serving customers in Merton and the surrounding area. Contact us to today to get a competitive quo...
"Flat roof extension" - CR44, job posted 13/05/25
Sonik Building Services
Trusted and professional extension builder in Merton. Experienced in all extension buildering work and keeping within budget and on quote. Sonik Bu...
"Loft conversion- 2 beds and a bathroom" - SW17, job posted 09/01/24
ACE BUILDING CONTRACTORS AND D
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Side return extension" - CR4, job posted 08/09/23
Renaissance Timothy Brewer Ltd
Renaissance Timothy Brewer Ltd is an established extension buildering business in Merton. We come highly recommended and provide competitive quotes...
Tenfold Renovation
Tenfold Renovation
Need to find an Extension Builder near you for all your extension buildering work?
Tenfold Renovation provides a local, trusted extension b...
PRM BUILDING
Relax... you have found a reliable extension builder in Merton. PRM BUILDING is a friendly and reliable company based in Merton who consider no job...
QSA Builders Ltd
QSA Builders Ltd are here to help customers who need an Extension Builder in Merton. We offer a competitive rate to complete all your extension bui...
RAJANIS CONSTRUCTION
Relax... you have found a reliable extension builder in Merton. RAJANIS CONSTRUCTION is a friendly and reliable company based in Merton who conside...
BUILD WORLD LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
PROBUILDER
PROBUILDER is a trusted extension builder serving customers in Merton and the surrounding area. Contact us to today to get a competitive quote for ...
Local Building Services
Trusted and professional extension builder in Merton. Experienced in all extension buildering work and keeping within budget and on quote. Local Bu...
You Nailed It Ltd
At You Nailed It Ltd we have been fitting bespoke bathrooms since 2008.It is a well-known fact that bathrooms sell houses. They also add a ...
Mayfair Construction uk
Experienced extension builder ready to quote for your work. Mayfair Construction uk is the best extension builder in Merton. No obligation free quo...
Astraway Construction Ltd.
Raymond Zmuda
Trusted and professional extension builder in Merton. Experienced in all extension buildering work and keeping within budget and on quote. Astraway...
TTG CONSTRUCTION LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
TRITON BUILDING RESTN LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
A A CONSTRUCTION LONDON LTD
A A CONSTRUCTION LONDON LTD is an established extension buildering business in Merton. We come highly recommended and provide competitive quotes fo...
£48/hr
£292/day
B D Roofing & Property Maintenance
Merton, CR4
Relax... you have found a reliable extension builder in Merton. B D Roofing & Property Maintenance is a friendly and reliable company based in Mert...
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- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local Merton Extension Builders or phone them directly - you’re in control!
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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 - £26,176
Garden office - £10,176
Granny annexe - £87,176
Build a flat roof extension - £22,176
Convert a Garage - £16,176
Hip to gable loft conversion - £42,176
Convert a bungalow loft - £29,176
Build a dormer loft conversion - £42,176
Build a swimming pool - £81,176
Build a Mansard loft conversion - £52,176
Concrete foundations - £6,426
Underpin a building - £17,676
Two storey extension - £88,264
Convert a basement - £39,480
Side return extension - £43,480
Loft conversion - £35,400
Garage - £18,676
Single storey extension - £58,520
Outbuilding - £10,176
Install an RSJ - £2,376
Build a kitchen extension - £42,176
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