Tanvalley House, 3 Tanvalley Road, Annaclone, Banbridge, Co Down, BT32 5AJ

Tanvalley House is a two-storey farmhouse with attic, built around 1850 in a rectangular plan with rear returns, situated in the townland of Tullintanvalley approximately one mile north-east of Annaclone. It sits prominently at a bend in the road in a rural setting, and its overall proportions and historic character remain largely intact, though the introduction of dry-dash render has somewhat affected its original appearance.

The principal elevation faces east and is symmetrically arranged. The roof is pitched with natural slate and clay ridge tiles, uPVC replacement rainwater goods, and dry-dashed chimneys with concrete capping and octagonal clay pots. The external walls are dry-dashed with smooth rendered quoins and a plinth. Windows throughout are 6/6 timber sliding sash without horns, set into painted masonry cills.

The most striking feature of the principal elevation is the elaborate Victorian Italianate stucco entrance porch, centrally positioned between single ground-floor windows on either side. The porch features a quadripartite fenestrated round-headed arcade to the front with heavily moulded imposts and archivolt, long-and-short quoins, and a moulded cornice rising to a cast-iron crested parapet. Matching bipartite fenestration is provided to the right cheek, while to the left cheek a door is set into a matching round-headed surround with a fanlight above. The door itself is a replacement timber panelled door. Above the porch, three first-floor windows sit directly over the ground-floor arrangement.

The left gable is asymmetrically arranged, with two ground- and first-floor windows positioned slightly left of centre and a boarded-up attic window centrally placed in the gable head. The right gable is also asymmetrical, with a single ground-floor window to the left of centre, a single first-floor window to the right, and a centrally located fixed multi-paned attic window in the gable head.

The rear elevation is more complex. To the right it is abutted by a full-height gabled return with two windows and a door to the right cheek and a single window on the left. To the left, a wide two-storey gable-ended return with lower eaves and ridge levels than the main house is also attached. The left cheek of this return features bipartite ground- and first-floor windows, while the gable has a door and bipartite window at ground-floor level and two first-floor windows set into round-headed recesses. The left portion of this gable is further abutted by a single-storey outbuilding on an incline, with the bay nearest the house converted to ancillary accommodation and featuring various windows and doors.

The garden to the front and side is enclosed by a dry-dashed wall with concrete coping, monolithic granite piers, and wrought-iron gates with castings to the north, though the main gates are replacements. To the rear stands a single-storey cement-rendered linear outbuilding with a slate roof, with modern agricultural units beyond.

The house first appears on the second edition Ordnance Survey map of 1859, having been built between that date and the first edition of 1833. The earlier map recorded one large building and four smaller outbuildings on or near the site, none of which have survived. In the 1830s the site was occupied by a Mr John Jury and valued at £4 4s. By the time of Griffith's Valuation in 1862, occupation had passed to Mr William Martin, a local farmer who leased the property from the Marquis of Downshire; with the construction of the new dwelling and alteration of the outbuildings, the value had risen to £16. Martin remained until 1869, when Mr Samuel Waddell, a draper who operated premises on Bridge Street, Banbridge, took possession. Waddell resided at Tanvalley House for around two decades, but by 1889 the Annual Revisions record that the house was vacant and managed by a caretaker, causing its valuation to fall to £12 that year, before being restored to £16 in 1892. Waddell continued to be listed as occupant until 1898, though it is unclear whether he was resident during this period.

The third edition Ordnance Survey map of 1902–03 records that both rear returns, the elaborate entrance porch, and a number of additional outbuildings to the west of the dwelling had been added by that date. The exact timing of these additions is not recorded in the valuation records, though they were likely constructed between 1889 and 1892 when the site's valuation fluctuated. In 1898 the Hillis family came into possession when Mr Robert Hillis took over the farm. The 1901 Census records Hillis as a widowed farmer aged 40 (Episcopalian), living at Tanvalley House with his mother Jane (68), his sister Agnes (28), and a number of farm servants. The census building return describes Tanvalley House as a first-class dwelling of ten rooms, accompanied by out offices including a stable, two cow houses, a piggery, a boiling house, and a barn, mostly in the western outbuildings. Robert Hillis purchased the property from the Marquis of Downshire in 1915 and continued to reside there until his death in 1941. All the original outbuildings shown on successive Ordnance Survey maps from 1833 to 1918 were demolished and replaced with modern corrugated-iron farm buildings in the late 20th century, after the 1975 edition of the map. The two rear returns added by 1902–03 are the only surviving additions to the original fabric.