On June 26, 2006, the Sipoo town council decided on a strategy to triple the municipality's population over the next 25 years. The decision was made after Helsinki announced plans to annex a part of the municipality in order to continue to build high-end urbanizations in the coastline (and thus high-tax revenue producing). The Finnish Council of State voted in favor of the annexation on June 28, 2007, with votes 8 to 4. Sipoo disputed this and appealed the Supreme Administrative Court but the court upheld the decision of the Council of State and the annexation took place on January 1, 2009. As Helsinki did not directly border Sipoo at any point, the city of Vantaa ceded the area lain between Helsinki and Sipoo to Helsinki in the process
