Trusted and professional extension builder in Mill Hill. Experienced in all extension buildering work and keeping within budget and on quote. WHITE...
Ashley Payravi
At crest construction we work extremely hard to ensure that our clients receive a quality of service that continues to build our reputation. Client...
Marcel Simion
Hi everyone!
i have good experience over 25 years working in construction and I have my on Business and my company
"I'm very happy for the job what his done" - LONDON,reviewed 29/09/17, SIMONA
Relax... you have found a reliable extension builder in Mill Hill. Taylor Construction Services Ltd is a friendly and reliable company based in Mil...
Need the extension buildering job done quickly without breaking the bank? Swiftdale Developments Ltd offer fast, reliable, and affordable extension...
Trusted and professional extension builder in Mill Hill. Experienced in all extension buildering work and keeping within budget and on quote. DS Co...
Need an Extension Builder in Mill Hill? Odp Builders has been helping local clients (5 mile radius) with their extension buildering jobs for many y...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
BR Building Services Limited is a trusted extension builder serving customers in Mill Hill and the surrounding area. Contact us to today to get a c...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Mill Hill it ranges from £1,912 (J&K Expert Building Services based in EN5) to £2,632 (Odp Builders based in N20).
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 Mill Hill by posting a job with HaMuch and we will send it to extension builders in Mill Hill.
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 - £17,600

Two storey extension - £88,150

Build a timber frame extension - £26,100

Build a swimming pool - £81,100

Single storey extension - £57,000

Side return extension - £42,625

Install an RSJ - £2,300

Outbuilding - £10,100

Build a Mansard loft conversion - £52,100

Loft conversion - £34,688

Build a kitchen extension - £42,100

Hip to gable loft conversion - £42,100

Granny annexe - £87,100

Garden office - £10,100

Convert a Garage - £16,100

Garage - £18,600

Build a flat roof extension - £22,100

Build a dormer loft conversion - £42,100

Concrete foundations - £6,350

Convert a bungalow loft - £29,100

Convert a basement - £38,625