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The Perfectionist
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SE4. No obligation free quotes and m...
S G Painting Contractor Ltd
Relax... you have found a reliable extension builder in SE4. S G Painting Contractor Ltd is a friendly and reliable company based in SE4 who consid...
From £2,304
South East Builders
London, SE4
South East Builders are here to help customers who need an Extension Builder in SE4. We offer a competitive rate to complete all your extension bui...
From £2,448
Baseline Build and Renovate Ltd
Baseline Build and Renovate Ltd is an established extension buildering business in SE4. We come highly recommended and provide competitive quotes f...
From £2,080
FRIERN BUILDING LTD
FRIERN BUILDING LTD is an established extension buildering business in SE4. We come highly recommended and provide competitive quotes for your work...
From £2,472
BERNARD CONSTRUCTION LTD
BERNARD CONSTRUCTION LTD are here to help customers who need an Extension Builder in SE4. We offer a competitive rate to complete all your extensio...
From £2,296
S W BUILDPROVEMENT
Whether you are looking to build, extend or upgrade we will help. From building to decorating. Our professional team have the skills and experie...
From £2,584
RM Building (London) Ltd
Trusted and professional extension builder in SE4. Experienced in all extension buildering work and keeping within budget and on quote. RM Building...
From £2,280
CHRIS BALL & SON ROOFING LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,512
blitbolt ltd
Need to find an Extension Builder near you for all your extension buildering work?
blitbolt ltd provides a local, trusted extension builder...
RSJ cost in SE4
How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SE4 it ranges from £2,080 (FRIERN BUILDING LTD based in SE22) to £2,584 (RM Building (London) Ltd based in SE23).
Comparing extension builders estimates for fitting an RSJ gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get rates and quotes to install an RSJ in SE4 by posting a job with HaMuch and we will send it to extension builders in SE4.
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Estimates for common extension builder jobs in SE4;
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 - £17,658
Two storey extension - £88,238
Build a timber frame extension - £26,158
Build a swimming pool - £81,158
Single storey extension - £58,168
Side return extension - £43,282
Install an RSJ - £2,358
Outbuilding - £10,158
Build a Mansard loft conversion - £52,158
Loft conversion - £35,235
Build a kitchen extension - £42,158
Hip to gable loft conversion - £42,158
Granny annexe - £87,158
Garden office - £10,158
Convert a Garage - £16,158
Garage - £18,658
Build a flat roof extension - £22,158
Build a dormer loft conversion - £42,158
Concrete foundations - £6,408
Convert a bungalow loft - £29,158
Convert a basement - £39,282