From £2,520
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,632
Allen & Allen is a high quality family run painting, decorating and property renovation company, established in 1982. Over the past 37 year...
From £2,168
Need an Extension Builder in West Ealing? SA BUILD SOLUTIONS LTD has been helping local clients (5 mile radius) with their extension buildering job...
From £2,504
Kensington Maintenance Ltd is a trusted extension builder serving customers in West Ealing and the surrounding area. Contact us to today to get a c...
From £2,160
Decozest are a family run west London property development firm specialised in luxury residential property development that's affordable. We offer ...
From £2,608
Need an Extension Builder in West Ealing? WIT CONSTRUCTION has been helping local clients (5 mile radius) with their extension buildering jobs for ...
From £2,496
Relax... you have found a reliable extension builder in West Ealing. Pristine Projects Ltd is a friendly and reliable company based in West Ealing ...
From £2,320
Project 1 Design & Build are here to help customers who need an Extension Builder in West Ealing. We offer a competitive rate to complete all your ...
From £2,648
Honest friendly builder:) 15years trading in West London. Manny happy costumers you can talk to.
From £2,336
Need an Extension Builder in West Ealing? Polish Builders Union Ltd has been helping local clients (5 mile radius) with their extension buildering ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in West Ealing it ranges from £2,160 (Decozest Ltd based in W5) to £2,648 (W5 Construction Ltd based in W13).
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 Ealing by posting a job with HaMuch and we will send it to extension builders in West Ealing.
"UC beam install 2.5m only (calculations done, building control notification done, no pretty boxing etc.)" - TW8, job posted 03/09/26
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 - £17,739

Two storey extension - £88,359

Build a timber frame extension - £26,239

Build a swimming pool - £81,239

Single storey extension - £59,784

Side return extension - £44,191

Install an RSJ - £2,439

Outbuilding - £10,239

Build a Mansard loft conversion - £52,239

Loft conversion - £35,993

Build a kitchen extension - £42,239

Hip to gable loft conversion - £42,239

Granny annexe - £87,239

Garden office - £10,239

Convert a Garage - £16,239

Garage - £18,739

Build a flat roof extension - £22,239

Build a dormer loft conversion - £42,239

Concrete foundations - £6,489

Convert a bungalow loft - £29,239

Convert a basement - £40,191