A decision timeline on whether two of the world’s biggest wind farms can be built off the north Norfolk coast is expected in June.
Both energy firms Vattenfall and Orsted have been asked to provide more details and answers to questions and these need to be submitted by the end of February.
The delay will also give people who live nearby more time to make their voices heard.
A spokesman for Vattenfall said: “There has only been one delay by the government which was announced on December 10. This has been for us to answer some questions and then a decision timetable will begin on June 1.
“This doesn’t mean a decision will be made then but the process will begin. The delay wasn’t a surprise – we expected it because of the general election.”
Norfolk Vanguard and another wind farm planned by Vattenfall called Boreas are expected to make landfall at Happisburgh, with underground cables connecting it to a substation at Necton, near Swaffham, from where it will link into the National Grid.
Hornsea Three would make landfall at Waybourne and link to a substation at Swardeston, south of Norwich.
The government was due to decide on the projects by December 10.
But the Department of Business, Energy and Industrial Strategy has now written to Norfolk Vanguard’s developer, Vattenfall, as well as Natural England and local councils, asking it to address issues ranging from traffic to the environment.