From £2,672
Warm welcome to MS Contractor ltd, Established in 1999 and incorporated in 2005. MS Contractor company based in Chelsea, London. Formed by a dynami...
From £2,416
At Atica Ltd we are experts in construction. We are able to offer a wide range of building services and we are working on both: design and build an...
From £2,688
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,352
Relax... you have found a reliable extension builder in West Brompton. Aflux Designs is a friendly and reliable company based in West Brompton who ...
From £2,608
We are an experienced London based design and build company, offering a full service that is all about creating beautiful homes that our clients lo...
From £2,432
At our boutique design studio in the heart of Chelsea, we offer bespoke interior and architectural design services catering to discerning clients s...
From £2,624
Builders by Design Ltd are here to help customers who need an Extension Builder in West Brompton. We offer a competitive rate to complete all your ...
From £2,400
Olga Ashby established her own design studio in 2009 to provide clients with a creative and professional interior design service.Olga graduated fro...
From £2,568
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in West Brompton it ranges from £2,352 (Aflux Designs based in SW10) to £2,688 (Short Let Management Ltd based in SW10).
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 West Brompton by posting a job with HaMuch and we will send it to extension builders in West Brompton.
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 - £17,822

Two storey extension - £88,482

Build a timber frame extension - £26,322

Build a swimming pool - £81,322

Single storey extension - £61,432

Side return extension - £45,118

Install an RSJ - £2,522

Outbuilding - £10,322

Build a Mansard loft conversion - £52,322

Loft conversion - £36,765

Build a kitchen extension - £42,322

Hip to gable loft conversion - £42,322

Granny annexe - £87,322

Garden office - £10,322

Convert a Garage - £16,322

Garage - £18,822

Build a flat roof extension - £22,322

Build a dormer loft conversion - £42,322

Concrete foundations - £6,572

Convert a bungalow loft - £29,322

Convert a basement - £41,118