After a five-year consultation period in which commercial real estate owners were left in limbo, the government has revealed the date by which energy-efficiency upgrades must be completed. 
More than £600B of commercial assets fall below the minimum requirement and will need a significant retrofit.
The Department for Energy Security and Net Zero and the Department for Business, Energy and Industrial Strategy announced late last week that commercial properties will have until 2031 to hit an Energy Performance Certificate of B or above. 
That is a delay of one year on the previous deadline of 2030. 
The government has dropped an interim deadline of 2027…