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Select your affordable CB8 extension builder
Relax... you have found a reliable extension builder in CB8. Adams & Eden Restoration is a friendly and reliable company based in CB8 who consider ...
From £2,320
John Kirk Building Ltd is an established extension buildering business in CB8. We come highly recommended and provide competitive quotes for your w...
From £2,368
Experienced extension builder ready to quote for your work. J&G HARDING BUILDING SERVICES is the best extension builder in CB8. No obligation free ...
From £2,192
Trusted and professional extension builder in CB8. Experienced in all extension buildering work and keeping within budget and on quote. Doug Misson...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CB8 it ranges from £2,192 (Doug Misson Construction based in CB8) to £2,760 (Adams & Eden Restoration based in Cb8).
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 CB8 by posting a job with HaMuch and we will send it to extension builders in CB8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near Bury St Edmunds | £34 | £251 |
| Install An RSJ near Cambridge | £41 | £275 |
| Install An RSJ near South Cambridgeshire | £50 | £315 |
| Install An RSJ near Sudbury | £34 | £229 |
| Install An RSJ near Thetford | £42 | £277 |
| Install An RSJ near Braintree | £37 | £247 |
| Install An RSJ near Stowmarket | £30 | £221 |
| Install An RSJ near Huntingdon | £38 | £284 |
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 - £17,710

Two storey extension - £88,315

Build a timber frame extension - £26,210

Build a swimming pool - £81,210

Single storey extension - £59,200

Side return extension - £43,863

Install an RSJ - £2,410

Outbuilding - £10,210

Build a Mansard loft conversion - £52,210

Loft conversion - £35,719

Build a kitchen extension - £42,210

Hip to gable loft conversion - £42,210

Granny annexe - £87,210

Garden office - £10,210

Convert a Garage - £16,210

Garage - £18,710

Build a flat roof extension - £22,210

Build a dormer loft conversion - £42,210

Concrete foundations - £6,460

Convert a bungalow loft - £29,210

Convert a basement - £39,863