The fire at the Ghost Ship artists collective in the Fruitvale district was the most lethal fire in Oakland’s history and the worst in the state since the 1906 San Francisco earthquake and fire. How can property owners and the City of Oakland make places like the Ghost Ship safe without making them so expensive that they cease to be affordable?

Last week San Jose became the latest Bay Area city to update its in-law unit ordinances to better serve the need for housing solutions. Once illegal in many cities, this simple way to add more housing — create an additional unit in the backyard, basement, attic or garage — has become a welcome tool in the fight to make urban housing affordable.

The latest update to Plan Bay Area is now underway — and its findings have revealed some troubling flaws in the planning tools we have for managing our region’s biggest challenges: making housing affordable and maintaining our transportation infrastructure. Now that these issues have been made apparent, it’s time to ask what we should be doing differently.