Porter Ranch is a suburban neighborhood of the City of Los Angeles, in the northwest portion of the San Fernando Valley. The Porter family acquired part of Rancho Ex-Mission San Fernando in 1874. Porter Ranch community started as a housing tract in the community of Northridge. This was along San Fernando Mission Blvd west of Reseda Blvd circa 19…Porter Ranch is a suburban neighborhood of the City of Los Angeles, in the northwest portion of the San Fernando Valley. The Porter family acquired part of Rancho Ex-Mission San Fernando in 1874. Porter Ranch community started as a housing tract in the community of Northridge. This was along San Fernando Mission Blvd west of Reseda Blvd circa 1960–1963. Almost no homes were north of Rinaldi Street until the area was annexed by the City of Los Angeles in 1965. These homes were only accessible via Tampa. Approximately 50 homes of the original tract was destroyed north of San Fernando Mission Blvd to build the 118 freeway.