Due to the growth of international end-users, in early 2012, Airbnb opened offices in Paris, Milan, Barcelona, Copenhagen, Moscow, and São Paulo. These openings were in addition to existing offices in San Francisco, London, Hamburg, and Berlin. In September 2013, the company announced that it would establish its European headquarters in Dublin. Prior to the 2012 Summer Olympics, Airbnb acquired London-based rival CrashPadder, subsequently adding 6,000 international listings to its existing inventory. This acquisition made Airbnb the largest lodging website in the United Kingdom.
The move was criticized by some rental hosts, stating it would deprive them of much needed income. These implementations were also criticized by the opposing Non-Partisan Association. Councillor George Affleck argued it was creating more bureaucracy, taxation and sticks, which was not solving the problem. He argued it made Vancouver a more difficult and costly place to live, also giving the opinion that more long term rental housing needs to be built. Airbnb's public policy manager for Canada welcomed the move of making short term rental legal, but criticized the ban on secondary suites from being rented. The company was also considering challenging the move, arguing that many family home spaces are saved for friends and relatives and would not be available for the long term rental market regardless.
Some cities have restrictions on subletting for a short period of time. Airbnb has published a list of regulations and requirements for cities in the United States. In some cities, collection of a transient occupancy tax by Airbnb is required. In many cities, hosts must register with the government and obtain a permit or license. Landlords or community associations may have restrictions on short-term sublets.