Daly City is only eight square miles, but it's one of the densest cities in the US. There are a few factors behind this, but one of the most interesting is the design of the houses. But it's not all building hacks in this episode, there's a darker past to some of Daly City's housing too.

Additional Reading:

• How Daly City Became One of the Most Densely Populated Cities in the Country
• Richard Rothstein on KQED's Forum discussing his book The Color of Law
• Little Boxes: The Legacy of Henry Doelger by Robert Keil

Reported by Amanda Stupi. Bay Curious is made by Olivia Allen-Price, Katrina Schwartz, Suzie Racho, Brendan Willard, Sebastian Miño-Bucheli and Chris Hoff. Additional support from Erika Aguilar, Jessica Placzek, Kyana Moghadam, Paul Lancour, Carly Severn, Lena Blanco, Ethan Lindsey, Vinnee Tong and Don Clyde.