Which government bodies influence national fiscal policies that potentially affect the housing market?

http://www.google.com/search?source=ig&hl=en&rlz=1G1GGLQ_ENUS308&q=government+bodies+influence+national+fiscal+policies+that+potentially+affect+the+housing+market&aq=0&aqi=g1g-m4&aql=&oq=government+bodies+influence+national+fiscal+policies+&gs_rfai=CwSX7Xeq4TMqxHI_uM5vngLoHAAAAqgQFT9BtTxs