Andrew Stoner to retire from Parliament

NSW Deputy Premier and leader of the NSW Nationals Andrew Stoner has announced he will retire from politics at the 2015 state election.

At a press conference on Wednesday afternoon, Mr Stoner said it was time to put his family first but he will remain in his portfolio role until 6pm on March 28, 2015 "to ensure this government is rewarded with another term."

Mr Stoner, the member for the mid-north coast seat of Oxley, has served in the NSW Parliament since 1999 and as Nationals leader since 2003.

He reflected on his and the party's successes saying their achievements are now being reflected in record investment in regional infrastructure with more than $13 billion being poured into improving roads, bridges, hospitals and schools and ensuring water security across inland NSW.

"Our state economy is growing strongly and leading the nation," Mr Stoner said. "We have boosted exports and investment for our state through our international engagement. Our global city Sydney has got its mojo back.

"Being part of, and seeing these achievements actually take place, means that I can step down knowing our state is a better place than when I first entered this career."

Premier Mike Baird requested Mr Stoner remain in his portfolio role as Minister for Trade and Investment, and Minister for Regional Infrastructure and Services until the state election for "continuity and stability".

Mr Baird described Mr Stoner as a "genuine friend". 

"It has been a privilege to work alongside him. He has made a decision today that he is putting his family as his prime focus and I absolutely respect and support that," Mr Baird said. "We say thank you for your services and thank you for your contributions to the state."

A leadership ballot is due to be held on Thursday, with Hospitality Minister Troy Grant, the member for Dubbo, the leading contender.

Education Minister Adrian Piccoli, who has long held ambitions to lead the party, may also stand.

It follows the announcement by former Liberal energy minister Chris Hartcher earlier on Wednesday that he will also retire at next year's poll.