From £2,168
Hatfield, AL10
Architecture and Construction all in one place.
FREE DRAWINGS for all projects we build.
From £2,480
Hatfield, AL10
Need to find an Extension Builder near you for all your extension buildering work?
Buildline provides a local, trusted extension buildering...
From £2,416
Hatfield, AL10
VALLEYCREST CONSTRUCTION LTD is a trusted extension builder serving customers in Hatfield and the surrounding area. Contact us to today to get a co...
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 £2,272
Hatfield, AL10
A1 Home Care Building Maintenance are here to help customers who need an Extension Builder in Hatfield. We offer a competitive rate to complete all...
From £2,072
Hatfield, AL10
Mick O Farrell Builders are here to help customers who need an Extension Builder in Hatfield. We offer a competitive rate to complete all your exte...
From £2,432
Buyerz Trading is an established and experienced local extension builder in Hatfield. Please contact us for a free, no obligation quote and competi...
From £2,576
Need to find an Extension Builder near you for all your extension buildering work?
G FORCE BUILDERS provides a local, trusted extension bui...
From £2,408
NJG BUILDING SOLUTIONS LTD is an established and experienced local extension builder in Hatfield. Please contact us for a free, no obligation quote...
From £2,384
Lemsford Building is a trusted extension builder serving customers in Hatfield and the surrounding area. Contact us to today to get a competitive q...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Hatfield it ranges from £2,072 (Mick O Farrell Builders based in AL10) to £2,576 (G FORCE BUILDERS based in AL9).
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 Hatfield by posting a job with HaMuch and we will send it to extension builders in Hatfield.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Hatfield | £64 | £283 |
| Install An RSJ near Welwyn Garden City | £42 | £268 |
| Install An RSJ near Potters Bar | £43 | £273 |
| Install An RSJ near St Albans | £63 | £288 |
| Install An RSJ near Harpenden | £86 | £315 |
| Install An RSJ near Hertford | £46 | £289 |
| Install An RSJ near Borehamwood | £42 | £270 |
| Install An RSJ near High Barnet | £43 | £272 |
| Install An RSJ near Cheshunt | £48 | £286 |
| 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 - £17,675

Two storey extension - £88,263

Build a timber frame extension - £26,175

Build a swimming pool - £81,175

Single storey extension - £58,504

Side return extension - £43,471

Install an RSJ - £2,375

Outbuilding - £10,175

Build a Mansard loft conversion - £52,175

Loft conversion - £35,393

Build a kitchen extension - £42,175

Hip to gable loft conversion - £42,175

Granny annexe - £87,175

Garden office - £10,175

Convert a Garage - £16,175

Garage - £18,675

Build a flat roof extension - £22,175

Build a dormer loft conversion - £42,175

Concrete foundations - £6,425

Convert a bungalow loft - £29,175

Convert a basement - £39,471