Maroubra MP Michael Daley has secured the leadership of the NSW Labor Party, and pledged to "fix the planning system in NSW" should he be elected Premier in March.

The newly elected leader laid out his vision for government as one "built on four pillars", naming investment in education and hospitals, easing the cost of living, jobs, and overdevelopment as his core priorities.

"We will make Sydney more liveable and stop unfairness and overdevelopment in the planning system," Mr Daley said.

Mr Daley comfortably defeated Kogarah MP Chris Minns in the leadership vote 33 to 12 on Saturday.