Elements Build SW Ltd is an established and experienced local extension builder in Mitchell. Please contact us for a free, no obligation quote and ...
From £2,088
HANDLEY BUILDERS is an established and experienced local extension builder in Mitchell. Please contact us for a free, no obligation quote and compe...
From £1,832
Relax... you have found a reliable extension builder in Mitchell. KC DESIGN AND BUILD is a friendly and reliable company based in Mitchell who cons...
From £1,872
A Collins Building Contractor is a trusted extension builder serving customers in Mitchell and the surrounding area. Contact us to today to get a c...
From £1,904
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,904
From start to finish, your project will be undertaken by one of the family, providing the utmost care and quality of workmanship. We’ll work with...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Mitchell it ranges from £1,832 (KC DESIGN AND BUILD based in TR2) to £2,144 (MYSA based in TR7).
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 Mitchell by posting a job with HaMuch and we will send it to extension builders in Mitchell.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Newquay | £32 | £230 |
| Install An RSJ near Truro | £31 | £206 |
| Install An RSJ near St Austell | £38 | £245 |
| Install An RSJ near Camborne | £28 | £196 |
| Install An RSJ near Falmouth | £33 | £220 |
| Install An RSJ near St Ives, Cornwall | £27 | £188 |
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 - £17,276

Two storey extension - £87,664

Build a timber frame extension - £25,776

Build a swimming pool - £80,776

Single storey extension - £50,520

Side return extension - £38,980

Install an RSJ - £1,976

Outbuilding - £9,776

Build a Mansard loft conversion - £51,776

Loft conversion - £31,650

Build a kitchen extension - £41,776

Hip to gable loft conversion - £41,776

Granny annexe - £86,776

Garden office - £9,776

Convert a Garage - £15,776

Garage - £18,276

Build a flat roof extension - £21,776

Build a dormer loft conversion - £41,776

Concrete foundations - £6,026

Convert a bungalow loft - £28,776

Convert a basement - £34,980