From £2,136
Plumbing, painting exterior, interior, extensions, plastering, skiming, carpeting, Flooring, you can ask us ..
From £3,784
Propello is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and competitive rate...
From £1,656
we are very efficient in our work.and make sure our client is one 100% satisfied with our work.
From £2,656
A.J Builders is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and competitive r...
From £2,472
Top Notch Tradesmen is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and compet...
From £2,216
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,544
Need to find an Extension Builder near you for all your extension buildering work?
Greg-Bud provides a local, trusted extension buildering ...
From £2,632
Krystian Wojasiewicz is a trusted extension builder serving customers in AL10 and the surrounding area. Contact us to today to get a competitive qu...
From £2,632
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £2,312
JJSR Construction Ltd is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and comp...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in AL10 it ranges from £1,656 (Rite Builders based in LU1) to £3,784 (Propello based in E17).
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 AL10 by posting a job with HaMuch and we will send it to extension builders in AL10.
| 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 | £285 |
| 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 - £17,804

Two storey extension - £88,456

Build a timber frame extension - £26,304

Build a swimming pool - £81,304

Single storey extension - £61,080

Side return extension - £44,920

Install an RSJ - £2,504

Outbuilding - £10,304

Build a Mansard loft conversion - £52,304

Loft conversion - £36,600

Build a kitchen extension - £42,304

Hip to gable loft conversion - £42,304

Granny annexe - £87,304

Garden office - £10,304

Convert a Garage - £16,304

Garage - £18,804

Build a flat roof extension - £22,304

Build a dormer loft conversion - £42,304

Concrete foundations - £6,554

Convert a bungalow loft - £29,304

Convert a basement - £40,920