139 Whiterock Bay, Killinakin, Killinchy village, Newtownards, Co Down, BT23 6QA

Two storey International Style house of approximately 1936 by Philip Bell, a pioneer of the modern movement in architecture in the province. The house is situated on a slight rise on the south side of Whiterock Bay road, overlooking Strangford Lough, roughly a mile west of Killinchy village.

The building is roughly square in plan with a cubist form, comprising interlocking flat-roofed rendered blocks with corner windows much influenced by the modern movement style of early twentieth-century Germany. The main north facade features a central entrance with a recent glazed door set within a small flat-roofed porch supported on a thin metal pole, with a small fixed light window to the west face. Directly to the right of the porch is a small porthole window with two square windows to the first floor. To the left is a projecting bay with large corner windows to each floor. The west facade has two first floor windows and a PVC door on the ground floor flanked by two further windows. Partly attached to the far right of this facade is a flat-roofed garage with timber-sheeted and glazed double doors. The east facade has windows to the centre of both ground and first floors, with the far right portion projecting to feature corner windows at each floor level. The rear contains two windows to the ground floor, which have retained their original metal frames (unlike the other windows, which now have PVC frames), with a partly glazed door between them and a single window to the first floor. The facades are finished in roughcast and painted. The roofs are flat with large overhangs. Metal and PVC rainwater goods are present. A rendered chimney stack exists to the east; a stack to the west has been removed.

The house was originally one of four built to complement the adjacent Strangford Lough Yacht Club. Bell designed the properties as weekend accommodation for sailing visitors and they were originally constructed without running water or any kind of power. The houses are said to have been built when high tides prohibited work on the club house itself. Most original window frames were replaced with PVC before the first survey. It is likely this house was extended in a similar style in the mid-twentieth century. Although the original window frames and glazing pattern were altered before listing, the exterior remains relatively intact. Of the original group of four houses, only one other at number 135 Whiterock Bay remains relatively unaltered, with the two further companions having since been unsympathetically altered and the yacht club replaced with a contemporary clubhouse. This represents a rare example of International Style architecture in the province.