Countisbury House is a 7 storey tower block on Crescent Wood Road on the edge of the Dulwich area of Southwark, London. Constructed in the late 1950s as part of the Sydenham Hill Estate, administrative boundary changes led to the block being isolated from the rest of the estate and being the only block coming under the control of the Southwark London Borough Council. The brick-built building has a Y-shaped footprint and accommodates 42 deck accessed flats.