Westerleigh is a predominantly residential neighborhood characterized by older, detached homes, many of which are on large lots. The streets are narrow, many of which do not exceed 29 feet in built width, indicative of the late 19th and early 20th century origins of the area. In December of 2003, this area was rezoned from R3-1 to R3X as part of larger rezoning in the central-northern portion of Staten Island.
The rezoning area is predominantly developed with single-family detached homes (80% of all homes). The present R3X zoning district permits one- and two-family detached homes on lots of a minimum of 35 feet wide, with a minimum lot area of 3,325 square feet. The R3X zoning district allows a maximum FAR of .5 plus .1 attic allowance. A ten-foot front yard and thirty-foot rear yard are required, except on corner lots. Two side yards are required equaling 10 feet, with a two-foot minimum. There is a maximum building height of 35 feet.