The Stone House, 93 Warren Road, Portavoe, Donaghadee, Co Down, BT21 0PJ

The Stone House is a large, distinctive one and a half to two storey Arts and Crafts style house of 1930, designed by Denis O'D Hanna. It stands on a rocky coastline approximately two miles north-west of Donaghadee, with a commanding seascape backdrop.

The building is fundamentally L-shaped in plan, with projections to the east, west, and north-east corner. The long portion of the L runs roughly north to south, with the broader foot extending from the north-west corner. The main entrance is positioned left of centre on the west-facing elevation, set within a two storey half-timbered gabled bay. The ground floor of this entrance bay is constructed in undressed snecked rubble stone with dressed sandstone dressings to the openings. The timber-framed first floor is jettied, supported on timber corbels whose front ends are carved in the form of grotesque human heads in the medieval manner. The main entrance comprises a timber door with narrow full-length panels set into a bevelled sandstone reveal. To the south face of the ground floor porch is a multi-pane timber window, whilst the first floor features a relatively large window of similar character and a small upper opener.

The façade immediately flanking the entrance bay is single storey. To the left is a large multi-pane window; to the right are two windows, with the far right window being considerably larger. Directly above the far right window sits a large flat-roofed dormer with matching window frames.

The south-facing façade of the shorter foot of the L is one and a half storeys. The ground floor contains two large multi-pane windows, with two almost identical windows on the upper floor set into mono-pitched roof half-dormers with brown brick dressings and quoins. The west-facing gable of this section is uneven and features a buttress to the left, creating a battered appearance. At ground floor level is a large segmental-headed glazed opening to the left with integral door, and to the right sits a projecting stone chimneybreast.

The south gable of the main L section is dominated by a steeply pitched hipped-roof loggia with battered end walls, each containing a large semicircular-headed multi-paned window overlooking east and west respectively. The roof is supported on two timber stanchions, with a central French window with plain glazing set into the rear wall of the gable itself. Above the loggia, a small single-pane window breaks through the exposed gable section.

The north elevation presents a more complex appearance, dispensing with the formality of the front elevations. It is two storeys overall but comprises various single and one and a half storey outshows. To the far left is a one and a half storey gabled projection; against its gable sits a large single storey garage extension in brown brick with a small multi-pane window to the upper floor. The right side is dominated by a largely one and a half storey lean-to-like projection whose roof merges with the main roof, featuring a small window with a recent casement frame and a much larger window with plate glass. A large hipped-roof dormer sits on this section's roof with a recent window frame. A small conservatory-like linking section with a mono-pitched roof and panelled and glazed double doors spans between the lean-to and the gable projection, with two small windows with apparently recent frames visible on the exposed first floor façade behind.

The rear elevation lacks the architectural refinement of the front, presenting a more bland 1960s suburban villa appearance. Right of centre is a large two storey gabled bay combining brown brick with Westmoreland slate cladding on the gable and between floor levels. At ground floor is a large plate glass window flanked by much narrower windows of similar glazing; the first floor features a similar arrangement with shorter windows. The short south face of the bay contains two relatively small ground floor windows with slightly shorter versions above, those at ground level with plate glass and those above with recent frames including upper openers. The north face has a similar arrangement. The upper floor of the north face is abutted to the right by a flat-roofed dormer with plate glazing. To the left of the bay is a large plate glass window with a large dormer above featuring a recent frame. To the right of the bay are five windows of varying size, mostly with recent frames. A large section of façade rises beyond eaves level into a very large uneven gable with Westmoreland slate cladding to its apex, containing a very long squat window with a recent frame. The far right of the rear façade is single storey. Much of the building's façade is constructed in snecked fieldstone, possibly greywacke, with rough sandstone dressings and relieving arches to many openings.

The expansive mainly gabled roof has a steep pitch with overhang and exposed rafter ends, covered in greenish Westmoreland slate. There are three brick chimney stacks: one to the main west gable in stone, one to the main ridge, one taller stack to the north elevation, and a similar one to the rear. Cast iron rainwater goods are dated 1930 with initials [unclear].

The house gates and gate screen are included in the listing.