From £2,488
Greater London, SE15
Trusted and professional extension builder in Peckham. Experienced in all extension buildering work and keeping within budget and on quote. Baselin...
From £2,264
The Casa Shop is nestled in the heart of Peckham, London. Established in 1998, we are specialist suppliers and installers of Eco Wood-Burning and G...
From £6,248
Based in Camberwell south east London we provide a turnkey service for Domestic and Commercial construction Projects from conception to compl...
From £2,192
Relax... you have found a reliable extension builder in Peckham. 1M Construction Ltd is a friendly and reliable company based in Peckham who consid...
From £2,320
Peckham Greater London, SE15
Global Business BoxLttd are here to help customers who need an Extension Builder in Peckham. We offer a competitive rate to complete all your exten...
From £2,688
Need an Extension Builder in Peckham? Oxus Construction has been helping local clients (5 mile radius) with their extension buildering jobs for man...
From £2,648
We pride ourselves on providing a professional, caring, and high-quality service and always meet our customers’ needs. Each contractor that works...
From £2,224
James Hall Property Solutions Ltd is a trusted extension builder serving customers in Peckham and the surrounding area. Contact us to today to get ...
From £2,296
Ballara Ltd is an established and experienced local extension builder in Peckham. Please contact us for a free, no obligation quote and competitive...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Peckham it ranges from £2,192 (1M Construction Ltd based in SE15) to £6,248 (Chris Ellis Project Service based in SE5).
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 Peckham by posting a job with HaMuch and we will send it to extension builders in Peckham.
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 - £18,061

Two storey extension - £88,841

Build a timber frame extension - £26,561

Build a swimming pool - £81,561

Single storey extension - £66,216

Side return extension - £47,809

Install an RSJ - £2,761

Outbuilding - £10,561

Build a Mansard loft conversion - £52,561

Loft conversion - £39,008

Build a kitchen extension - £42,561

Hip to gable loft conversion - £42,561

Granny annexe - £87,561

Garden office - £10,561

Convert a Garage - £16,561

Garage - £19,061

Build a flat roof extension - £22,561

Build a dormer loft conversion - £42,561

Concrete foundations - £6,811

Convert a bungalow loft - £29,561

Convert a basement - £43,809