* Engie already owns 33 pct of Suez
* French state owns 33 pct stake in Engie
PARIS, Dec 20 (Reuters) - French utility Engie is considering acquiring full control of Suez, in which it already has a 33 percent stake, French business radio station BFM reported, citing sources close to Engie.
BFM reported that Engie's chief executive, Isabelle Kocher, had been lobbying leading French conservative and centre-right politicians over the idea. Political support is key as the French state holds 33 percent of Engie. A French presidential election takes place next year.
BFM added that Engie would make a decision on the future of Suez after next year's French presidential election, due in April and May, and by the end of 2018.
Officials at Engie and Suez could not be immediately reached for comment on the report.
Suez has a market capitalisation of roughly 8 billion euros ($8.30 billion), while Engie's market capitalisation stands at around 30 billion euros.
$1 = 0.9639 euros Reporting by Gwenaelle Barzic and Sudip Kar-Gupta; Editing by Andrew Callus