From £2,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,008
BOWIE CONSTRUCTION LTD is a trusted extension builder serving customers in Essex and the surrounding area. Contact us to today to get a competitive...
From £2,336
O G Conversions is an established and experienced local extension builder in Essex. Please contact us for a free, no obligation quote and competiti...
From £2,280
Essex Roofing Ltd is an established and experienced local extension builder in Essex. Please contact us for a free, no obligation quote and competi...
From £3,560
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in Essex. No obligation fr...
From £2,416
Trusted and professional extension builder in Essex. Experienced in all extension buildering work and keeping within budget and on quote. DEBRAY BU...
From £2,408
Trusted and professional extension builder in Essex. Experienced in all extension buildering work and keeping within budget and on quote. 1st Look ...
From £2,656
MDH Construction is an established and experienced local extension builder in Essex. Please contact us for a free, no obligation quote and competit...
From £2,544
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,304
Relax... you have found a reliable extension builder in Essex. Pinnacle Construction is a friendly and reliable company based in Essex who consider...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Essex it ranges from £2,008 (BOWIE CONSTRUCTION LTD based in CB21) to £3,560 (ALLIED BUILDING ASSOCIATES LTD based in CB22).
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 Essex by posting a job with HaMuch and we will send it to extension builders in Essex.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Bishop's Stortford | £42 | £264 |
| Install An RSJ near South Cambridgeshire | £43 | £305 |
| Install An RSJ near Cambridge | £38 | £271 |
| Install An RSJ near Braintree | £37 | £247 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Harlow | £43 | £288 |
| Install An RSJ near Ware | £47 | £296 |
| Install An RSJ near Sudbury | £34 | £229 |
| Install An RSJ near Letchworth | £44 | £283 |
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 - £17,768

Two storey extension - £88,402

Build a timber frame extension - £26,268

Build a swimming pool - £81,268

Single storey extension - £60,360

Side return extension - £44,515

Install an RSJ - £2,468

Outbuilding - £10,268

Build a Mansard loft conversion - £52,268

Loft conversion - £36,263

Build a kitchen extension - £42,268

Hip to gable loft conversion - £42,268

Granny annexe - £87,268

Garden office - £10,268

Convert a Garage - £16,268

Garage - £18,768

Build a flat roof extension - £22,268

Build a dormer loft conversion - £42,268

Concrete foundations - £6,518

Convert a bungalow loft - £29,268

Convert a basement - £40,515