15 Ann Street, Gilford, Craigavon, County Down, BT63 6HX

15 Ann Street is a two-bay, two-storey mid-terrace house built around 1840–1850, situated on the main road through Gilford, east of Gilford Mill and north of the town centre. It forms part of a terrace of 25 dwellings on Ann Street (excluding the gatehouse at No. 1 Ann Street), and was originally constructed as part of a mill workers' housing complex of back-to-back houses built by the proprietors of the adjacent linen thread spinning mill.

The building is square on plan, with a two-storey modern flat-roof return to the rear. The roof is pitched natural slate with angled ridge tiles, and there is a rendered chimneystack fitted with clay pots. External walls are finished in painted ruled and lined render. Rainwater goods are cast-iron half-round to the front and uPVC to the rear. All windows are replacement uPVC units set within projecting masonry sills.

The principal elevation faces east and comprises a window to the centre at first floor level, with a modern half-panelled uPVC door to the ground floor right, accessed by a tiled step, and a window to the left at ground floor. The south elevation abuts the adjoining property (HB19/01/021N). The rear (west) elevation has windows to both floors on the right-hand side and is abutted on the left by the modern two-storey flat-roof return, which itself has a window to each floor; the left and right cheek walls of the return were not inspected. A timber-sheeted gate to the right encloses the rear yard. The north elevation abuts the adjoining property (HB19/01/021P). Vehicular access is available to the rear, and the site is bounded towards the mill by mature trees.

The house is one of the earliest workers' dwellings built by the mill's founders, originally trading as Dunbar and Thompson and later as Dunbar McMaster & Co Ltd. The spinning mill opened in 1839 and was an immediate success, drawing large numbers of workers to Gilford and causing the town's population to more than quadruple between 1841 and 1851, from 643 to 2,814. The back-to-back terrace originally comprised two parallel rows: numbers 9 to 26, which fronted onto High Street, and a second row behind them — known as Bann Street — whose rear walls were shared with the High Street houses and which opened towards the mill. Both rows are shown on the second edition Ordnance Survey map of 1858, captioned 'High Street' and 'Bann St', and a view of the mill said to date from around 1841 also depicts the rear of the terrace as it appeared shortly after construction. The houses are listed in Griffith's Valuation of 1863 as the property of Dunbar McMaster & Co. The High Street houses were each valued at £2 10s and measured 15 feet long by 12 feet wide over two storeys; by that date they were already rated as 'deteriorated by age and not in good repair', indicating they had been standing for some time. The Bann Street houses behind were valued slightly lower at £2 5s, despite being the same dimensions.

The back-to-back arrangement provided only two rooms per unit, with a single window at each floor, offering cramped conditions for larger households. However, as has been noted in the historical literature, the open site allowed reasonable circulation of fresh air, and the accommodation would have represented an improvement on the poorer type of rural dwelling of the period. The houses were frequently occupied by single people or couples, though families of four or more were not uncommon. Hugh Dunbar, founder of the enterprise, took his responsibilities as an employer seriously: the mill provided a monthly inspection of all company-owned houses, annual lime-washing, painting and repairs at the firm's expense, as well as a medical attendant and a school for the workforce.

The first tenants recorded at what is now number 15 (previously numbered 16 on the High Street side) were Mary Vaughan, and to the rear on Bann Street, Robert Trousdale. Subsequent tenants on the High Street side included William McGorgan (1887), Elizabeth McCaw (1902), and Elizabeth McKeown (1903). At the time of the 1901 census the occupier was Elizabeth McKeown, a 50-year-old widow employed as a flax spinner at the mill. She remained in residence at the time of the 1911 census, by which point she had ceased working, likely as a beneficiary of the newly introduced old-age pension. On the Bann Street side at the time of the 1911 census lived Elizabeth Smyth, a 66-year-old widow who worked as a preparer at the mill. Other recorded tenants on the Bann Street side included George Chambers (1902), David Hanna (1903), David Gibson (1904), Thomas Coal (1907), and Maggie Reid (1908). In 1916 the Bann Street house to the rear was incorporated into the front house, and the combined dwelling was revalued at £4 10s with a weekly rent of 3s 3d. Subsequent occupants included James McKeown (date not recorded) and David Anderson (1924). The majority of the Bann Street houses were absorbed into the front houses in 1915–16, though six remained as separate dwellings until the 1930s.

The mill itself had a worldwide reputation in its prime. The British Trade Journal of 1890 reported that Dunbar McMaster & Co exported twine for salmon fishing to British Columbia, carpet threads, bookbinder's threads, extra-strong threads for leather and thick cloths, and fine threads for sewing-machinists and lace makers, to the United States, South and Central America, Brazil, Australia, and the wider British colonies. In 1879, following the imposition of high import taxes on linen thread in the United States, Hugh Dunbar McMaster established a mill in Greenwich Village, New York, bringing over workers and machinery from Ireland and installing his brother John as manager. The emigration of Gilford workers to America had a marked demographic effect, with the town's population halving between 1871 and 1881. The mill nonetheless continued to operate in Gilford and remained central to the life of the town well into the 20th century, before a decline in the Ulster linen industry led to its closure in the early 1980s.

The building has been retained in use as a residential dwelling. Extensive alterations over the years have removed much of the historic fabric, and it is no longer considered of special architectural or historic interest.