From £1,568
Need to find an Extension Builder near you for all your extension buildering work?
A-Pex Building provides a local, trusted extension build...
From £2,376
Relax... you have found a reliable extension builder in CT5. Clint Construction is a friendly and reliable company based in CT5 who consider no job...
From £1,928
Osprey Property Repairs is a trusted extension builder serving customers in CT5 and the surrounding area. Contact us to today to get a competitive...
From £1,512
All building work , all hoyse maintenance. House extension and refurbishment works.
From £1,256
35 years in the trade can Lay bricks plaster roofing wall and floor tiling
From £1,920
Need to find an Extension Builder near you for all your extension buildering work?
JLS Building Services provides a local, trusted extensio...
From £2,528
Mayfair developers have been in the construction industry for over a decade. Our passion is to transform old spaces into new usable homes for our c...
From £2,400
Experienced extension builder ready to quote for your work. SEAN EVANS GENERAL BUILDER is the best extension builder in CT5. No obligation free quo...
From £2,072
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,160
I D S BUILDERS LIMITED is an established extension buildering business in CT5. We come highly recommended and provide competitive quotes for your w...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CT5 it ranges from £1,256 (S MEGSON CONSTRUCTION based in CT5) to £2,528 (Mayfair Developers ltd based in ME8).
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 CT5 by posting a job with HaMuch and we will send it to extension builders in CT5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Whitstable | £28 | £214 |
| Install An RSJ near Herne Bay | £28 | £213 |
| Install An RSJ near Canterbury | £31 | £232 |
| Install An RSJ near Faversham | £34 | £235 |
| Install An RSJ near Swale | £35 | £241 |
| Install An RSJ near Sittingbourne | £35 | £246 |
| Install An RSJ near Thanet | £27 | £207 |
| Install An RSJ near Margate | £27 | £208 |
| Install An RSJ near Ramsgate | £27 | £208 |
| Install An RSJ near Ashford | £36 | £256 |
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 - £17,272

Two storey extension - £87,658

Build a timber frame extension - £25,772

Build a swimming pool - £80,772

Single storey extension - £50,440

Side return extension - £38,935

Install an RSJ - £1,972

Outbuilding - £9,772

Build a Mansard loft conversion - £51,772

Loft conversion - £31,613

Build a kitchen extension - £41,772

Hip to gable loft conversion - £41,772

Granny annexe - £86,772

Garden office - £9,772

Convert a Garage - £15,772

Garage - £18,272

Build a flat roof extension - £21,772

Build a dormer loft conversion - £41,772

Concrete foundations - £6,022

Convert a bungalow loft - £28,772

Convert a basement - £34,935