New York Mayor Bill de Blasio wants state lawmakers to expand tenant protections for the city’s 1 million rent-regulated apartments.

He unveiled several proposals Tuesday. They include eliminating a rule that lets landlords automatically increase rent by 20 percent each time a tenant moves out and setting new restrictions on rent surcharges for apartment or building improvements.

Affordable housing is one of de Blasio’s centerpiece issues. He says strengthening the rent rules is “a vital priority.”

They’re shaping up to be a major topic for the state Legislature. The rules expire June 15.

Tenant advocates are praising de Blasio’s stand. But the Rent Stabilization Association, a landlords’ group, says the current regulations have worked well when it comes to money for building improvements.

The Daily News first reported the proposals.

(AP)