Blumenfield previously represented the 45th district in the California State Assembly, which also covers the southwestern San Fernando Valley.

He later worked as Director of Government Affairs for the Santa Monica Mountains Conservancy and then as District Chief of Staff to Congressman Berman in the San Fernando Valley.

[1] Blumenfield took office as a member the California State Assembly in 2008 after defeating Republican candidate Armineh Chelebian in the general election.

He represents the 3rd Council District, which spans the northwest portion of Los Angeles in the San Fernando Valley, including the communities of Canoga Park, Reseda, Tarzana, Winnetka and Woodland Hills.

"[4] He opposed the construction of 220 affordable housing units in Reseda, arguing "large scale apartments should not be wedged in-between single family homes by right.