The Battersea Power station has had its heritage status upgraded from a Grade II to a Grade II* listing.
Battersea Power Station has been derelict since 1982
The power station was one of the first coal-fired electrical facilities set up in England as part of the National Grid power distribution system.
The art deco station stopped producing electricity in 1982.
The upgrade was approved by Culture Minister Margaret Hodge on the advice of English Heritage, the government's adviser on historic buildings.
Ms Hodge said: "I consider that English Heritage has been very careful in its advice, they have taken full account of the interior losses and have weighed this properly against the remaining merits of the building.
"For this reason I am satisfied with the recommendation of an upgrade to Grade II*."
Simon Thurley, chief executive of English Heritage, said: "The upgrading of this internationally celebrated landmark is exceptionally good news.
"Battersea Power Station is one of London's most loved buildings and this much-deserved upgrading can only put extra emphasis on the importance of the regeneration process and help to speed it along."
The station, designed by J Theo Halliday, was sold to Treasury Holdings in November for £400m.