Planners working to reshape housing policies in unincorporated parts of the county have moved one step closer to updating a housing plan largely centered around helping lower-income families afford to live in Marin, which boasts some of the state’s steepest real-estate prices.

A 200-page environmental impact report that is part of a process to update the Marin County Housing Element was released December 20. The housing document applies to West Marin and other unincorporated

areas…