Rancho Penasquitos & Torrey Highlands The beautiful topography of mesas and canyons set Rancho Penasquitos apart from the rest of the City of San Diego. The Rancho Penasquitos homes, mostly built in the 1960s and 1970s, were built from a master plan developer that included park space and very limited commercial space. Rancho Penasquitos homes were built for the affluent middle class and have many comforts that encourage young middle class families to flourish. Landscaping is lush, roofs are tiled, power lines are underground, and indoor light is of plenty as the sun lights up the canyon throughout the day. Many residents have contributed creatively by elaborating their yards and recreation spaces. Many homes have great views of the hills and canyons and neighborhoods are quiet, with a country ambience.