Relax... you have found a reliable extension builder in Stowmarket. Mixbrow Construction is a friendly and reliable company based in Stowmarket who...
From £1,976
Trusted and professional extension builder in Stowmarket. Experienced in all extension buildering work and keeping within budget and on quote. RD F...
From £2,056
Offering a friendly and professional construction and insulation services to private residential and commercial customers in East Anglia and surrou...
From £2,024
Professional, reliable and competitive with great workmanship.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Stowmarket it ranges from £1,824 (Mixbrow Construction based in IP6) to £2,056 (D S Mead Limited based in IP14).
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 Stowmarket by posting a job with HaMuch and we will send it to extension builders in Stowmarket.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Stowmarket | £30 | £221 |
| Install An RSJ near Ipswich | £33 | £235 |
| Install An RSJ near Bury St Edmunds | £34 | £251 |
| Install An RSJ near Suffolk Coastal | £28 | £215 |
| Install An RSJ near Sudbury | £34 | £229 |
| Install An RSJ near Thetford | £42 | £277 |
| Install An RSJ near Felixstowe | £31 | £231 |
| Install An RSJ near Harwich | £34 | £248 |
| Install An RSJ near Tendring | £31 | £226 |
| Install An RSJ near Colchester | £34 | £232 |
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 - £17,270

Two storey extension - £87,655

Build a timber frame extension - £25,770

Build a swimming pool - £80,770

Single storey extension - £50,400

Side return extension - £38,913

Install an RSJ - £1,970

Outbuilding - £9,770

Build a Mansard loft conversion - £51,770

Loft conversion - £31,594

Build a kitchen extension - £41,770

Hip to gable loft conversion - £41,770

Granny annexe - £86,770

Garden office - £9,770

Convert a Garage - £15,770

Garage - £18,270

Build a flat roof extension - £21,770

Build a dormer loft conversion - £41,770

Concrete foundations - £6,020

Convert a bungalow loft - £28,770

Convert a basement - £34,913