SAN FRANCISCO (CBS SF/ AP)— The California Supreme Court has ruled that cities have broad authority to require builders to include a certain percentage of affordable housing in new projects.

At issue was a 2010 San Jose law that requires some new residential developments to set aside 15 percent of their units for sale at below-market rates.

The California Building Industry Association argued the city failed to justify that requirement and should base any such requirement on an assessment of any negative effect the market-rate housing would have.

Monday’s ruling keeps affordable housing requirements approved in more than 170 California cities intact.

A call to an attorney for the group was not immediately returned.

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