Amid political jousting over housing prices, the city faces a state mandate: It must build — or at least plan to build — 82,000 units by 2031. And more than half need to be considered affordable. Chronicle reporter J.K. Dineen walks host Demian Bulwa through the city's plan to focus on westside neighborhoods like the Sunset and Richmond. But as Dineen explains, the high cost of building remains a huge obstacle. | Unlimited Chronicle access: sfchronicle.com/pod

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