With San Francisco’s tight housing market and high cost of living, city supervisors argued that home sharing stands to tighten that market further and could contribute to shrinking its middle class. The full scope of the impact on the rental market of the home-sharing trend through companies like Airbnb has yet to be determined. In cities like San Francisco and San Diego, which attract travelers year-round while locals contend with high costs of living, critics argue that apartment owners can simply rent out their space for weekends or entire weeks rather than put the property on the market for longer-term renters, further tightening housing inventory and contributing to higher rental prices. Increasing construction in these markets is one answer to claims that home-sharing will ruin the rental market in some of the country's largest and most expensive cities in which to live. In San Diego, for example, a study from the University of Southern California and Beacon Economics found that without a boost in new construction activity, employment gains and population growth, monthly rents would rise $115 by 2018. Rent growth is slowing, The Wall Street Journal reported in June, as major U.S. cities see an increase in multifamily construction, in some cases growing at more than twice the typical rate. Developers fill the properties by offering concessions to their first classes of renters, lowering rents throughout the neighborhood. In the meantime, some cities are using home-sharing to help potential home buyers get a feel for neighborhoods in which they're considering a purchase. Last year, Airbnb teamed up with Realtor.com to let potential buyers book a night in a private room near the house or apartment they're thinking of buying.
Airbnb has issued an 18-page lawsuit against the city of San Francisco after lawmakers implemented a $1,000 per day charge for home-sharing services that allow unregistered users to post rentals. Homeowners must pay a $50 ($250 from November) fee to register their property for services such as Airbnb, but 10 in at least 8 failed to do so, leading to the introduction of the $1,000 charge. Airbnb alleges that San Francisco officials violated its constitutional right of commercial speech, claiming that verification of each registered user would be a “significant burden” to its operation.