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Available extension builders in SE9 reply
Select your affordable SE9 extension builder
Tommy House
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in SE9 and the surrounding area. Contact us to today to get a comp...
Jay Christenson
Experienced extension builder ready to quote for your work. Jmc buildets is the best extension builder in SE9. No obligation free quotes and many h...
Eltham, SE9
Need to find an Extension Builder near you for all your extension buildering work?
AMJAC CONSTRUCTION LTD provides a local, trusted extensi...
RLD Contractors Ltd is an established and experienced local extension builder in SE9. Please contact us for a free, no obligation quote and competi...
Pro-Tec Roofing & Building Services Ltd is an established and experienced local extension builder in SE9. Please contact us for a free, no obligati...
Rapid Bee Ltd is an established extension buildering business in SE9. We come highly recommended and provide competitive quotes for your work.
...Experienced extension builder ready to quote for your work. Aumosa Ltd is the best extension builder in SE9. No obligation free quotes and many hap...
Relax... you have found a reliable extension builder in SE9. Upwards and Outwards is a friendly and reliable company based in SE9 who consider no j...
Andy Hart
London, SE9
Need to find an Extension Builder near you for all your extension buildering work?
Hartigans Construction provides a local, trusted extensi...
Need an Extension Builder in SE9? Loft Living has been helping local clients (5 mile radius) with their extension buildering jobs for many years. G...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SE9 it ranges from £1,816 (Jmc buildets based in SE9) to £2,816 (HOUSE BUILDING SERVICES LIMITED based in DA16).
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 SE9 by posting a job with HaMuch and we will send it to extension builders in SE9.
"RSJ installation - check if we need one installed" - ELTHAM, job posted 01/06/25
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 - £17,570

Two storey extension - £88,106

Build a timber frame extension - £26,070

Build a swimming pool - £81,070

Single storey extension - £56,408

Side return extension - £42,292

Install an RSJ - £2,270

Outbuilding - £10,070

Build a Mansard loft conversion - £52,070

Loft conversion - £34,410

Build a kitchen extension - £42,070

Hip to gable loft conversion - £42,070

Granny annexe - £87,070

Garden office - £10,070

Convert a Garage - £16,070

Garage - £18,570

Build a flat roof extension - £22,070

Build a dormer loft conversion - £42,070

Concrete foundations - £6,320

Convert a bungalow loft - £29,070

Convert a basement - £38,292