From £2,592
Need an Extension Builder in Brookmans Park? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs f...
From £2,248
Trusted and professional extension builder in Brookmans Park. Experienced in all extension buildering work and keeping within budget and on quote. ...
From £2,384
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Brookmans Park. No obligation free q...
From £2,512
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 Brookmans Park. No obligation free quotes and many ...
From £2,184
JK Doors is a trusted extension builder serving customers in Brookmans Park and the surrounding area. Contact us to today to get a competitive quot...
From £2,392
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £2,512
skilled worker who specializes in completing a wide range of building and renovation projects
From £2,400
Relax... you have found a reliable extension builder in Brookmans Park. Derryard Construction Ltd is a friendly and reliable company based in Brook...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Brookmans Park it ranges from £2,184 (JK Doors based in W1W) 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 Brookmans Park by posting a job with HaMuch and we will send it to extension builders in Brookmans Park.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Hatfield | £64 | £283 |
| Install An RSJ near Potters Bar | £43 | £273 |
| Install An RSJ near Welwyn Garden City | £42 | £268 |
| Install An RSJ near St Albans | £63 | £288 |
| Install An RSJ near Cheshunt | £48 | £285 |
| Install An RSJ near Hertford | £46 | £289 |
| Install An RSJ near High Barnet | £43 | £272 |
| Install An RSJ near Borehamwood | £42 | £270 |
| Install An RSJ near Harpenden | £86 | £315 |
| Install An RSJ near Hoddesdon | £46 | £296 |
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 - £17,728

Two storey extension - £88,342

Build a timber frame extension - £26,228

Build a swimming pool - £81,228

Single storey extension - £59,560

Side return extension - £44,065

Install an RSJ - £2,428

Outbuilding - £10,228

Build a Mansard loft conversion - £52,228

Loft conversion - £35,888

Build a kitchen extension - £42,228

Hip to gable loft conversion - £42,228

Granny annexe - £87,228

Garden office - £10,228

Convert a Garage - £16,228

Garage - £18,728

Build a flat roof extension - £22,228

Build a dormer loft conversion - £42,228

Concrete foundations - £6,478

Convert a bungalow loft - £29,228

Convert a basement - £40,065