​Authors evaluated smoking-related costs in multiunit housing. 

From 2008 to 2009, they surveyed California multiunit housing owners or managers on their past-year smoking-related costs (i.e., cleaning and replacement) and smoke-free policies. A total of 27.1% of respondents had incurred smoking-related costs (mean $4935), and 33.5% reported complete smoke-free policies, which lowered the likelihood of incurring smoking-related costs. Implementing statewide complete smoke-free policies may save multiunit housing property owners $18,094,254 annually.