From £2,488
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,120
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,064
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,880
Trusted and professional extension builder in SN6. Experienced in all extension buildering work and keeping within budget and on quote. G R & Son h...
From £1,960
Dacol Services is Swindons number 1 property maintenance service.
Trusted by many letting agents, landlords, homeowners, and hoteliers.
From £2,344
BROWNS TOTAL DESIGN & BUILD LTD is an established and experienced local extension builder in SN6. Please contact us for a free, no obligation quote...
From £1,656
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,296
MJ solutions is an established and experienced local extension builder in SN6. Please contact us for a free, no obligation quote and competitive r...
From £2,272
We have a skilled and dedicated team of professional tradesmen to carry out all your requirements. Whether you are looking to build, extend or upgr...
From £1,944
Relax... you have found a reliable extension builder in SN6. Highworth Felt Roofing Limited is a friendly and reliable company based in SN6 who con...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SN6 it ranges from £1,656 (Watts Builders based in SN25) to £2,488 (Austen Dawson (UK) Ltd based in SN6).
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 SN6 by posting a job with HaMuch and we will send it to extension builders in SN6.
"RSJ installation" - SN2, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Stratton St Margaret | £37 | £238 |
| Install An RSJ near Thamesdown | £38 | £239 |
| Install An RSJ near Swindon | £38 | £238 |
| Install An RSJ near Vale of White Horse | £36 | £271 |
| Install An RSJ near Witney | £32 | £244 |
| Install An RSJ near Calne | £29 | £225 |
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
| Install An RSJ near Didcot | £36 | £266 |
| Install An RSJ near North Wiltshire | £32 | £242 |
| Install An RSJ near West Wiltshire | £32 | £242 |
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 - £17,402

Two storey extension - £87,854

Build a timber frame extension - £25,902

Build a swimming pool - £80,902

Single storey extension - £53,048

Side return extension - £40,402

Install an RSJ - £2,102

Outbuilding - £9,902

Build a Mansard loft conversion - £51,902

Loft conversion - £32,835

Build a kitchen extension - £41,902

Hip to gable loft conversion - £41,902

Granny annexe - £86,902

Garden office - £9,902

Convert a Garage - £15,902

Garage - £18,402

Build a flat roof extension - £21,902

Build a dormer loft conversion - £41,902

Concrete foundations - £6,152

Convert a bungalow loft - £28,902

Convert a basement - £36,402