While on the commissioners court as the lone Republican member, Larson worked to lower property tax rates seven times during his twelve years in office. In 2005, he pushed the court to freeze property taxes for senior citizens and the disabled. He opposed pay raises for commissioners and refused to accept increases when they were approved. Larson worked to reduce the impact of the 2005 round of military base closings in San Antonio, which gained a reported 11,000 jobs despite the loss of 1,000 positions on the affected bases. Larson previously served on the San Antonio - Bexar County Metropolitan Planning Organization, the Alamo Area Council of Governments, and the Greater San Antonio Crime Commission.