Turning London’s office blocks green will cost £30 billion, says Savills

Citi is spending £100 million on a renovation of its Canary Wharf HQ to make it more eco-friendly

(Picture: Citi)

London landlords will have to spend £30 billion upgrading older office buildings to hit proposed government environmental standards, according to a leading property agent.

Savills UK said commercial landlords will need to spend up to £40 per sq ft (£430 per sq m) to make necessary improvements.