Lurie's upzoning measure, which the Board of Supervisors approved last month and which comes in response to intense state pressure to build tens of thousands of new housing units in the next half-decade, would allow for six- to 10-story buildings on major thoroughfares in multiple parts of the west and north side San Francisco. But opponents fear the measure will lead to mass displacement of existing residents as older buildings are torn down for redevelopment, and will lead to altering the character of their neighborhoods.