A tree-shaded Main Line community about 12 miles west of Center City Philadelphia, Penn Valley is shaped by spacious lots, a dense canopy of woods, and easy access to Interstate 76. The area is largely residential, with no true town center of its own, so residents tend to drive to nearby Narberth for shopping, dining, and community events, while the corridor along Montgomery Avenue serves as Penn Valley's modest business strip.
The rental stock runs heavily toward single-family homes on lots averaging just under three-quarters of an acre, with architectural styles ranging from stately French Country estates and brick Colonial Revivals to sprawling ranch-style homes. Brick apartment communities make up the rest of the options.
Penn Valley falls within Lower Merion Township. The Penn Valley Civic Association has marked the community's boundaries since 1930 with iconic signs depicting William Penn and a farmhouse, maintaining the area's distinct identity.