Thirty years ago, few people could have imagined that downtown San Jose would be taking off like it is today. In the last year, 659 new units of housing came on the market and more than 1,900 are under construction. This is what a generation of city leaders has been working toward, and the excitement is both palpable and well deserved. But it’s also fragile.

Pressure for development at the urban edge of the Bay Area is growing. At the end of 2015, the cities of Morgan Hill and Gilroy in southern Santa Clara County both proposed expanding their city boundaries into farmland. Upcoming decisions on these proposals, which county analysts have called reminiscent of a bygone era, will set an important precedent for the county’s next phase of growth.