It is bounded to northeast by the Parañaque; to the southeast by Alabang Muntinlupa; to the west and southwest by Bacoor; and to the northwest by the Manila Bay. Half of its land area is residential and the remaining half is used for commercial, industrial and institutional purposes.
The Sarao Motors factory, also located in Las Piñas, is the place where jeepneys are assembled piece by piece in painstaking individual production. The factory remains open to buyers and curious tourists all year round.
Las Piñas also houses SM Southmall, which has an area of 205,120 square meters and is located along Alabang–Zapote Road. The newest shopping mall development in the city is Robinsons Place Las Piñas. The first high-rise building in the city is the 16-storey residential Almanza Metropolis.