There are three subareas located within Boundary Ridge, which are Boundary Ridge 1 & 2, and Boundary Estates. Boundary Ridge 1 & 2 are located on the high bluff above Semiahmoo Bay. The entire Boundary Ridge gated community within Semiahmoo features large lots with extravagant luxury homes. The waterfront homes along Great Blue Heron Ln sit on half acre lots while the remaining properties are typically a bit smaller at one third to half acre. The four properties associated in Boundary Estates are located on much larger lots. These manicured estates occupy one to two acre parcels.