On August 4, 2000, Belmonte announced his intention to run for
mayor of Quezon City. In 2001, he won the election for the position of mayor and was re-elected in 2004 and in 2007, with vice mayor
Herbert Bautista as his running mate in each election. As mayor, his nine years of prudent fiscal management, aggressive tax management strategies, as well as increasing efficiency and growing discipline in the management, and use of City resources has made Quezon City the most competitive city of Metro Manila, and second in the Philippines today. These are rankings made by businessmen in the Philippines in studies of the Asian Institute of Management, in cooperation with international agencies. Quezon City was cited for the dynamism of its local economy, the quality of life of its residents, and the responsiveness of the local government in addressing business and other needs. In 2007, Quezon City was ranked No. 7 Asian City of the Future, based on a survey commissioned by the
London Financial Times, through a consultancy based in Singapore. In a 2008 Tholons special report on global services, Quezon City ranked as the number 21 emerging global outsourcing city, the highest among all nine new entrants. Belmonte was a long-standing member of the
Lakas–CMD and
Lakas–Kampi–CMD parties from his first term in Congress in 1992 until November 2009, where he last held the position of senior vice president for externals. On November 19, 2009, he and Vice Mayor Bautista were sworn in as members of the opposition
Liberal Party. ==House of Representatives (2010–2019)==