Why do some housing markets stagnate during an economic boom while others maintain their value amid a national recession? There isn't really one all-encompassing answer, but there are several well-established factors that determine the strength of a given housing market. For suburbs in the tri-state area, one of the most important factors is availability of mass transit.
Montclair real estate was not hit nearly as hard by the recession as many other towns; a major reason for this is the presence of both bus and train service to New York City. Decamp Bus Lines has provided commuter and charter service to NYC for decades, while New Jersey Transit has operated direct weekday service since 2002 (weekend service arrived in 2009). Bus riders can get on or off anywhere along Decamp's established routes; train riders have seven stations to choose from and bus and train stops are walkable from most places in Montclair.
Near the center of town are the Bay Street and Walnut Street stations. Further north are the Watchung Plaza and Upper Montclair stations. Commuters can also board at Mountain Avenue, Montclair Heights, or Montclair State University. It's unusual to have 7 train stations in in one town, but this is what makes makes Montclair NJ one of the most commutable suburbs of New York City.