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Select your affordable B11 extension builder
Gary Wilson
Reliable person 25 years experience
if you look on a website rated people and have a look at my ratings
Need to find an Extension Builder near you for all your extension buildering work?
Avonvale Garage Doors provides a local, trusted extensio...
AJ Home Improvements is an established extension buildering business in B11. We come highly recommended and provide competitive quotes for your wor...
Brickfast Builders is an established extension buildering business in B11. We come highly recommended and provide competitive quotes for your work....
Relax... you have found a reliable extension builder in B11. F.I.I Building Services Ltd is a friendly and reliable company based in B11 who consid...
We are a forward thinking, award winning design and build company based in Solihull in the West Midlands. We strive to deliver the best experience ...
Experienced extension builder ready to quote for your work. x10hosts is the best extension builder in B11. No obligation free quotes and many happy...
From £1,896
Need an Extension Builder in B11? BellTrim Wood Products has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £1,632
Peter Smith
Reliable and trustworthy
Also on checkatrafe
From £1,224
JAMES Crawford
we have over 13 years exp
we go that extra mile to make sure customers are 100 % happy
we cover a 20 miles radus for b26 area...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in B11 it ranges from £1,224 (J s building & maintenance services limited based in B26) to £2,184 (Brickfast Builders based in B6).
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 B11 by posting a job with HaMuch and we will send it to extension builders in B11.
"Removal of 3 walls and 3 RSJ installations to extend a kitchen. Need for a structual engineering consultation and building control approval since at least one wall will be load bearing." - BIRMINGHAM, job posted 05/05/24
"RSJ installation" - BIRMINGHAM, job posted 01/03/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Birmingham | £29 | £229 |
| Install An RSJ near Solihull | £29 | £231 |
| Install An RSJ near Smethwick | £29 | £230 |
| Install An RSJ near Oldbury | £29 | £229 |
| Install An RSJ near Sutton Coldfield | £29 | £228 |
| Install An RSJ near Knowle | £31 | £241 |
| Install An RSJ near Halesowen | £28 | £225 |
| Install An RSJ near West Bromwich | £29 | £228 |
| Install An RSJ near Rowley Regis | £29 | £228 |
| Install An RSJ near Sandwell | £29 | £231 |
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 - £17,222

Two storey extension - £87,584

Build a timber frame extension - £25,722

Build a swimming pool - £80,722

Single storey extension - £49,448

Side return extension - £38,377

Install an RSJ - £1,922

Outbuilding - £9,722

Build a Mansard loft conversion - £51,722

Loft conversion - £31,148

Build a kitchen extension - £41,722

Hip to gable loft conversion - £41,722

Granny annexe - £86,722

Garden office - £9,722

Convert a Garage - £15,722

Garage - £18,222

Build a flat roof extension - £21,722

Build a dormer loft conversion - £41,722

Concrete foundations - £5,972

Convert a bungalow loft - £28,722

Convert a basement - £34,377