The housing construction process in California is hindered by a complex permitting process, lengthy delays, stringent tenant rights making it difficult to evict tenants, high taxes, and zoning restrictions. The imposition of a 6% transfer tax in San Francisco is seen as a deterrent to investing in housing. Zoning determines the character of a neighborhood, and residents may oppose changes that alter the neighborhood's character. While rezoning may be necessary as cities grow, it should be done in areas that make sense, such as near public transit locations like BART stations.