From £2,232
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,736
We provide structural engineering design and construction service (D&B) Our dedicated, enthusiastic and highly qualified staff to find the appropri...
From £2,544
We work closely with our Clients to provide the most suitable procurement route to suit each Client’s requirements and aspirations. We are experi...
From £2,592
Cannon Build Solutions is a local family-run building firm whose strong reliable reputation has been well established in North-West London and Buck...
From £2,520
M &M GENERAL BUILDING is an established extension buildering business in GU4. We come highly recommended and provide competitive quotes for your wo...
From £2,360
Experienced extension builder ready to quote for your work. JD CONSTRUCTION is the best extension builder in GU4. No obligation free quotes and man...
From £3,336
Paramount Brickwork Limited is an established extension buildering business in GU4. We come highly recommended and provide competitive quotes for y...
From £2,664
Victorian Roofing & Property Maintenance is an established and experienced local extension builder in GU4. Please contact us for a free, no obligat...
From £2,624
Trusted and professional extension builder in GU4. Experienced in all extension buildering work and keeping within budget and on quote. Chinthurst ...
From £2,432
Experienced extension builder ready to quote for your work. Arrus Knoble Ltd is the best extension builder in GU4. No obligation free quotes and ma...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in GU4 it ranges from £2,232 (Elite Roofing and Building based in GU1) to £3,336 (Paramount Brickwork Limited based in GU3).
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 GU4 by posting a job with HaMuch and we will send it to extension builders in GU4.
"RSJ installation" - GU3, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Guildford | £53 | £298 |
| Install An RSJ near Woking | £43 | £277 |
| Install An RSJ near Great Bookham | £42 | £281 |
| Install An RSJ near Ash Vale | £41 | £277 |
| Install An RSJ near New Haw | £43 | £273 |
| Install An RSJ near Waverley | £68 | £313 |
| Install An RSJ near Aldershot | £41 | £275 |
| Install An RSJ near Farnborough | £41 | £273 |
| Install An RSJ near Elmbridge | £43 | £277 |
| Install An RSJ near Camberley | £41 | £283 |
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 - £17,904

Two storey extension - £88,606

Build a timber frame extension - £26,404

Build a swimming pool - £81,404

Single storey extension - £63,080

Side return extension - £46,045

Install an RSJ - £2,604

Outbuilding - £10,404

Build a Mansard loft conversion - £52,404

Loft conversion - £37,538

Build a kitchen extension - £42,404

Hip to gable loft conversion - £42,404

Granny annexe - £87,404

Garden office - £10,404

Convert a Garage - £16,404

Garage - £18,904

Build a flat roof extension - £22,404

Build a dormer loft conversion - £42,404

Concrete foundations - £6,654

Convert a bungalow loft - £29,404

Convert a basement - £42,045