Tekton Construction NW is an established extension buildering business in FY2. We come highly recommended and provide competitive quotes for your w...
Smedley Construction Ltd is a trusted extension builder serving customers in FY2 and the surrounding area. Contact us to today to get a competitive...
Need to find an Extension Builder near you for all your extension buildering work?
Poulton Building & Joinery Services provides a local, tr...
Relax... you have found a reliable extension builder in FY2. Green Generation Builders Ltd is a friendly and reliable company based in FY2 who cons...
COASTAL CONSTRUCTION LTD is an established and experienced local extension builder in FY2. Please contact us for a free, no obligation quote and co...
J D Holland Building Services is a trusted extension builder serving customers in FY2 and the surrounding area. Contact us to today to get a compet...
JSM BUILDING SOLUTIONS LIMITED is a trusted extension builder serving customers in FY2 and the surrounding area. Contact us to today to get a compe...
From £2,024
Keith Williams
We do it all from plan to completion
25 yrs and no complaints ..
modern and contemporary
kitchen bathrooms
From £1,848
Interbuild is an established extension buildering business in FY2. We come highly recommended and provide competitive quotes for your work.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in FY2 it ranges from £1,696 (COASTAL CONSTRUCTION LTD based in FY5) to £2,048 (Green Generation Builders Ltd based in FY3).
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 FY2 by posting a job with HaMuch and we will send it to extension builders in FY2.
"RSJ installation" - FY3, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Blackpool | £29 | £209 |
| Install An RSJ near Thornton | £29 | £211 |
| Install An RSJ near Fleetwood | £28 | £206 |
| Install An RSJ near Lytham St Annes | £28 | £206 |
| Install An RSJ near Fulwood | £31 | £217 |
| Install An RSJ near Penwortham | £30 | £218 |
| Install An RSJ near Preston | £30 | £218 |
| Install An RSJ near Southport | £27 | £198 |
| Install An RSJ near Lancaster | £25 | £211 |
| Install An RSJ near Morecambe | £25 | £212 |
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 - £17,173

Two storey extension - £87,509

Build a timber frame extension - £25,673

Build a swimming pool - £80,673

Single storey extension - £48,456

Side return extension - £37,819

Install an RSJ - £1,873

Outbuilding - £9,673

Build a Mansard loft conversion - £51,673

Loft conversion - £30,683

Build a kitchen extension - £41,673

Hip to gable loft conversion - £41,673

Granny annexe - £86,673

Garden office - £9,673

Convert a Garage - £15,673

Garage - £18,173

Build a flat roof extension - £21,673

Build a dormer loft conversion - £41,673

Concrete foundations - £5,923

Convert a bungalow loft - £28,673

Convert a basement - £33,819