From £2,384
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Brickendon. No obligation free quote...
From £2,760
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
From £2,296
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Brickendon. No obligation free quotes and many happ...
From £2,184
JK Doors is a trusted extension builder serving customers in Brickendon and the surrounding area. Contact us to today to get a competitive quote fo...
From £2,392
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £2,592
Need an Extension Builder in Brickendon? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for m...
From £2,512
skilled worker who specializes in completing a wide range of building and renovation projects
From £2,088
Member since April 2025
Trusted and professional extension builder in Brickendon. Experienced in all extension buildering work and keeping within budget and on quote. GR M...
From £2,400
Relax... you have found a reliable extension builder in Brickendon. Derryard Construction Ltd is a friendly and reliable company based in Brickendo...
From £2,168
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in Brickendon. We offer a competitive rate to complete all your extens...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Brickendon it ranges from £2,088 (GR MAINTENANCE LTD based in IG11) to £2,760 (Rafix Building based in EN4).
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 Brickendon by posting a job with HaMuch and we will send it to extension builders in Brickendon.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Hertford | £46 | £289 |
| Install An RSJ near Ware | £47 | £296 |
| Install An RSJ near Hoddesdon | £46 | £296 |
| Install An RSJ near Welwyn Garden City | £42 | £268 |
| Install An RSJ near Cheshunt | £48 | £285 |
| Install An RSJ near Hatfield | £64 | £283 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Potters Bar | £43 | £273 |
| Install An RSJ near Harlow | £43 | £288 |
| Install An RSJ near Epping Forest | £44 | £273 |
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 - £17,678

Two storey extension - £88,266

Build a timber frame extension - £26,178

Build a swimming pool - £81,178

Single storey extension - £58,552

Side return extension - £43,498

Install an RSJ - £2,378

Outbuilding - £10,178

Build a Mansard loft conversion - £52,178

Loft conversion - £35,415

Build a kitchen extension - £42,178

Hip to gable loft conversion - £42,178

Granny annexe - £87,178

Garden office - £10,178

Convert a Garage - £16,178

Garage - £18,678

Build a flat roof extension - £22,178

Build a dormer loft conversion - £42,178

Concrete foundations - £6,428

Convert a bungalow loft - £29,178

Convert a basement - £39,498