In California, the cost of building affordable housing keeps climbing, with some units nearing $1 million to construct. At the same time, older developments are at risk of falling out of affordability as costs rise and protections expire, putting pressure on the system meant to support low-income residents. Tia Patterson, CEO of the California Community Reinvestment Corporation, lays out what’s driving these pressures and what it would take to build and preserve housing that meets people’s needs.