Max Dixon
We are a construction company specialising in all aspects of building works, loft construction Extension complete home renovation, structural ...
We provide our clients with excellent service and quality. Whether you are looking to extend or upgrade, our professional team has the skills and e...
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in Brockley. No obligation free quotes ...
Jay Christenson
Experienced extension builder ready to quote for your work. Jmc buildets is the best extension builder in Brockley. No obligation free quotes and m...
RLD Contractors Ltd is an established and experienced local extension builder in Brockley. Please contact us for a free, no obligation quote and co...
Trusted and professional extension builder in Brockley. Experienced in all extension buildering work and keeping within budget and on quote. Vidano...
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in Brockley. We offer a competitive rate to complete all your e...
Rapid Bee Ltd is an established extension buildering business in Brockley. We come highly recommended and provide competitive quotes for your work....
At Home Tranformers Ltd we have been fitting bespoke bathrooms for over 10 years. We pride ourselves on being the go-to bathroom fitters for discer...
Need to find an Extension Builder near you for all your extension buildering work?
Ask Building provides a local, trusted extension builder...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Brockley it ranges from £1,816 (Jmc buildets based in SE9) to £2,656 (Ask Building based in SE1).
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 Brockley by posting a job with HaMuch and we will send it to extension builders in Brockley.
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 - £17,600

Two storey extension - £88,150

Build a timber frame extension - £26,100

Build a swimming pool - £81,100

Single storey extension - £57,000

Side return extension - £42,625

Install an RSJ - £2,300

Outbuilding - £10,100

Build a Mansard loft conversion - £52,100

Loft conversion - £34,688

Build a kitchen extension - £42,100

Hip to gable loft conversion - £42,100

Granny annexe - £87,100

Garden office - £10,100

Convert a Garage - £16,100

Garage - £18,600

Build a flat roof extension - £22,100

Build a dormer loft conversion - £42,100

Concrete foundations - £6,350

Convert a bungalow loft - £29,100

Convert a basement - £38,625