From £2,152
Our building services company AJ Construction was established in 2008. Since then we have been helping customers in Nottinghamshire and the surroun...
From £2,064
Trusted and professional extension builder in Retford. Experienced in all extension buildering work and keeping within budget and on quote. Gilman+...
From £2,472
If you are looking for a block-paving specialist Random Stone Construction can help. We have been transforming driveways for 15 ye...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Retford it ranges from £2,064 (Gilman+Child based in DN22) to £2,472 (Random Stone Construction based in S81).
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 Retford by posting a job with HaMuch and we will send it to extension builders in Retford.
"RSJ installation 5m Currently in place French door 2m - wall 1m - window 2m Remove door, window and wall, for rsj in prep for bifold doors" - DN22, job posted 06/02/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Retford | £31 | £243 |
| Install An RSJ near Bassetlaw | £31 | £243 |
| Install An RSJ near Worksop | £33 | £265 |
| Install An RSJ near Gainsborough | £30 | £234 |
| Install An RSJ near Forest Town | £33 | £262 |
| Install An RSJ near Mansfield Woodhouse | £33 | £262 |
| Install An RSJ near Wickersley | £33 | £257 |
| Install An RSJ near Lincoln | £31 | £232 |
| Install An RSJ near Doncaster | £29 | £238 |
| Install An RSJ near Mansfield | £33 | £261 |
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 - £17,529

Two storey extension - £88,044

Build a timber frame extension - £26,029

Build a swimming pool - £81,029

Single storey extension - £55,587

Side return extension - £41,830

Install an RSJ - £2,229

Outbuilding - £10,029

Build a Mansard loft conversion - £52,029

Loft conversion - £34,025

Build a kitchen extension - £42,029

Hip to gable loft conversion - £42,029

Granny annexe - £87,029

Garden office - £10,029

Convert a Garage - £16,029

Garage - £18,529

Build a flat roof extension - £22,029

Build a dormer loft conversion - £42,029

Concrete foundations - £6,279

Convert a bungalow loft - £29,029

Convert a basement - £37,830