From £2,088
HANDLEY BUILDERS is an established and experienced local extension builder in TR7. Please contact us for a free, no obligation quote and competitiv...
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...
From £1,872
A Collins Building Contractor is a trusted extension builder serving customers in TR7 and the surrounding area. Contact us to today to get a compet...
From £1,832
Relax... you have found a reliable extension builder in TR7. KC DESIGN AND BUILD is a friendly and reliable company based in TR7 who consider no jo...
From £1,744
Experienced extension builder ready to quote for your work. KEAST CONSTRUCTION LTD is the best extension builder in TR7. No obligation free quotes ...
From £1,832
J C MITCHELL BUILDERS LTD is a trusted extension builder serving customers in TR7 and the surrounding area. Contact us to today to get a competitiv...
From £2,016
Rock Construction is a trusted extension builder serving customers in TR7 and the surrounding area. Contact us to today to get a competitive quote ...
From £2,024
Relax... you have found a reliable extension builder in TR7. BUILDMARK BUILDERS is a friendly and reliable company based in TR7 who consider no job...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in TR7 it ranges from £1,744 (KEAST CONSTRUCTION LTD based in TR1) 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 TR7 by posting a job with HaMuch and we will send it to extension builders in TR7.
| 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 - £17,236

Two storey extension - £87,604

Build a timber frame extension - £25,736

Build a swimming pool - £80,736

Single storey extension - £49,720

Side return extension - £38,530

Install an RSJ - £1,936

Outbuilding - £9,736

Build a Mansard loft conversion - £51,736

Loft conversion - £31,275

Build a kitchen extension - £41,736

Hip to gable loft conversion - £41,736

Granny annexe - £86,736

Garden office - £9,736

Convert a Garage - £15,736

Garage - £18,236

Build a flat roof extension - £21,736

Build a dormer loft conversion - £41,736

Concrete foundations - £5,986

Convert a bungalow loft - £28,736

Convert a basement - £34,530