 Starting in the 1950s, a series of suburban waterfront communities were being rapidly developed in Southeast Brooklyn, including in present-day Bergen Beach, Canarsie, and Mill Basin.By 1963, a new 69th Precinct building for the New York City Police Department, as well as the South Shore High School in Canarsie, had to be constructed to accommodate the growing population.The neighborhood had some of the most expensive houses in Brooklyn by 1972.