The ban applies to privately owned homes that share a party wall with another home. [ABC News] The rationale, per city official Rebecca Woodbury:
“It doesn’t matter if it’s owner-occupied or renter-occupied. We didn’t want to discriminate. The distinguishing feature is the shared wall.” As justification for the rule, she cited studies showing that secondhand smoke seeped through ventilating ducts and walls, even through cracks [emphasis added -- W.O.]. “It depends on a building’s construction,” she said, “but it does affect the unit next door, with the negative health impacts due to smoke.”
San Rafael is in affluent Marin County just north of San Francisco. Woodbury said there had been hardly any opposition to the ordinance: “We have a very low percentage of smokers in the county,” she said. On proposals in Berkeley, Calif. to ban some smoking in private homes, see this recent post.
P.S. With end-of-year donation time coming on, I won’t be writing any checks to groups like the American Lung Association that support this sort of thing. Plenty of deserving health and research charities do great work while being respectful of individual liberty and property rights.