From £2,192
If you are looking for a Dunmow extension builder and you need something replaced, fitted, or fixed, contact GS Contractors (Loughton) Limited toda...
From £2,384
We provide our Customers in the Essex and London area with a wide range of property related services, including kitchen, bathroom, bedroom and comp...
From £2,656
Dunmow, CM6
MDH Construction is an established and experienced local extension builder in Dunmow. Please contact us for a free, no obligation quote and competi...
From £2,080
Need an Extension Builder in Dunmow? Mc2 Building Services has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £3,560
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in Dunmow. No obligation f...
From £2,400
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £2,600
D C Salsbury Builders is an established and experienced local extension builder in Dunmow. Please contact us for a free, no obligation quote and co...
From £2,352
Need to find an Extension Builder near you for all your extension buildering work?
JKL Construction & Carpentry Ltd provides a local, trust...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Dunmow it ranges from £1,680 (JLP CAPENTRY & CONSTRUCTION based in CO3) 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 Dunmow by posting a job with HaMuch and we will send it to extension builders in Dunmow.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Bishop's Stortford | £42 | £264 |
| Install An RSJ near Braintree | £37 | £247 |
| Install An RSJ near Chelmsford | £38 | £258 |
| Install An RSJ near Harlow | £43 | £288 |
| Install An RSJ near Witham | £36 | £240 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Ware | £47 | £296 |
| Install An RSJ near Maldon | £36 | £244 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Hoddesdon | £46 | £296 |
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 - £17,765

Two storey extension - £88,397

Build a timber frame extension - £26,265

Build a swimming pool - £81,265

Single storey extension - £60,296

Side return extension - £44,479

Install an RSJ - £2,465

Outbuilding - £10,265

Build a Mansard loft conversion - £52,265

Loft conversion - £36,233

Build a kitchen extension - £42,265

Hip to gable loft conversion - £42,265

Granny annexe - £87,265

Garden office - £10,265

Convert a Garage - £16,265

Garage - £18,765

Build a flat roof extension - £22,265

Build a dormer loft conversion - £42,265

Concrete foundations - £6,515

Convert a bungalow loft - £29,265

Convert a basement - £40,479