This area isn't "Arbutus Ridge", it's Mackenzie heights, located, tucked into the area 'in the middle of' the triangle made by Kitsilano to the N, Dunbar to the W and Arbutus to the E.  The realtors regularly use the name, & people wonder where it is.  It is a historic name, from 'Mackenzie St' ((naming a battle, as do several parallel streets), centred on Balaclava Park.