4 Cyprus Avenue, Belfast, Co Antrim BT5 5NT

4 Cyprus Avenue is a two-storey semi-detached sandstone house dating from around 1877, attributed to the prominent Belfast architects Young & Mackenzie — described by the Dictionary of Irish Architects as "the most successful architectural practice in Belfast" and the leading architects for the Presbyterian Church in the North East, who also received some of the most important commercial commissions in the city. The house forms part of a group of four villas originally known as Plevna Villas, comprising this property together with 6 Cyprus Avenue, 2 Cyprus Avenue, and 99 Upper Newtownards Road, all set on a generous site between Cyprus Avenue, Beersbridge Road, and Upper Newtownards Road in the East Belfast townland of Ballyhackamore.

The house has an L-shaped plan form and sits on the north side of Cyprus Avenue, with its principal elevation facing south. It is attached along its east side to 6 Cyprus Avenue. The roof is pitched natural slate with angled black-clay ridge tiles and projecting eaves, served by uPVC half-round guttering discharging to circular downpipes. Two rectangular rendered chimney stacks rise from the roofline, each with a corbelled coping and red-clay chimney pots. The external walls are built in rock-faced, random-coursed Scrabo sandstone with a chamfered plinth course. Window openings are square-headed with flat-arch lintels and painted cills, and the majority retain their original double-hung timber sash windows — 2/1 sashes at ground floor and 4/1 sashes at first floor — both types fitted with ogee horns.

The south elevation, being the principal front, is composed of three bays: an eastern bay containing two ground-floor windows and one first-floor window; a projecting three-sided canted bay immediately to the west, rising the full two storeys; and a recessed bay at the western end. The entrance door is set in a square-headed opening in the western bay, with a chamfered stone surround, a replacement six-panelled timber door with fanlight, and three steps curved on plan leading up to it. A cast metal lamp is mounted on the wall to the left of the door.

The east elevation shows the side of the canted bay to the south with window openings at both ground and first floor, followed by a two-bay gabled projection and a single bay to the north with a monopitch roof extending down from the main roofline in a catslide form. The central bays of this elevation have replacement timber windows at ground floor, while the northern bay has smaller 1/1 sashes. The rear north elevation is two storeys for most of its width, with a single-storey flat-roofed section at the east end. It features a modern timber casement window at ground floor, a sash window at first floor, and a square-headed door opening with a sheeted timber door.

A single-storey flat-roofed extension was added to the rear of the building; records confirm it was in place by at least 1987. To the rear yard, which is tarmaced, there is also a single-storey flat-roofed garage and shed. The house has a paved driveway and a lawned garden to the west, and a modest landscaped garden to the south. The boundaries are formed by a hedge to the south, timber fencing to the east, and red-brick walling to the north. A painted metal gate fronting onto Cyprus Avenue is supported on slim rectangular-section concrete piers with corbelled caps and fluted panels.

The architectural style and materials closely relate to the group of semi-detached houses on Beersbridge Road also attributed to Young & Mackenzie, though the Cyprus Avenue houses are significantly larger with a more complex plan form incorporating the two-storey canted bay.

The four Plevna Villas were built for the Bloomfield Land and Building Company Limited, formed in 1874 by the landowning Boyd family to secure leases for building projects in the East Belfast townlands of Ballyhackamore and Ballycloughan. Young & Mackenzie's papers record that the firm designed four villas in the Bloomfield area in 1877, with construction carried out by the builder J. Smyth and Son. The Annual Revisions confirm the villas had been erected by 1878 and include a plan from around that date depicting Plevna Villas in their current layout, indicating that no significant alterations to the original design were made during the late Victorian period. In the same year, Young & Mackenzie also designed a terrace of cottages on Beersbridge Road for the same company.

In 1878, the valuer set the total rateable value of No. 4 at £27 and recorded that it was initially occupied by William Sharman Crawford, a local saddler with business premises on Ann Street. Between 1890 and 1910 the house was occupied by a Miss Anne Patterson, who took in boarders. The 1901 census classified it as a first-class dwelling with eight rooms, and the Belfast Revaluation of 1900 raised its rateable value to £30. Anne Patterson vacated in 1910, when James E. Archibald, chief reporter at the Belfast Newsletter, took possession of the house.

Around 1900, ownership of Plevna Villas passed to the Irish mathematician William McFadden Orr (1866–1934), who was born in Comber, County Down, and held the post of Professor of Mathematics at the Royal College of Science, Dublin, between 1891 and 1933, as recorded in the Oxford Dictionary of National Biography. The house became known as Greystone in the early 20th century. Under the First General Revaluation of Property in Northern Ireland (1936–57), the rateable value was raised to £52. By the 1930s, local bedding manufacturer George C. Hamilton had taken up residence, and his family continued to live there until at least the 1970s. By the end of the Second General Revaluation (1956–72), the rateable value had been further increased to £53.

The house lies within a conservation area and has group value with its three neighbouring villas. It makes a positive contribution to the character of the local area and is of interest for its style, proportion, and ornamentation, as well as its age, authenticity, and historic associations with William McFadden Orr.