Sacramento’s most high-profile bill is back, and its future could now depend on San Diego’s highest-ranking legislator in the Capitol.

The bill, SB 50, would dramatically increase the number of of homes that could be built near jobs, good schools and transit across California, and would effectively end single-family zoning by allowing up to four homes to be built on any single-family lot.

It was shelved last year by state Sen. Anthony Portantino, but turned into a two-year bill to keep it alive. Now, due to state legislative rules, it needs to clear the Senate by the end of the month. If it does, it will head to the Assembly on a normal legislative schedule.

To pass it, Senate President Pro Tem Toni Atkins will have to play a major role.