Ossett Grammar School Formerly Known As Park House

Ossett Grammar School, formerly known as Park House, is a large house dating from the third quarter of the 19th century. Originally a mill owner's residence, it is now part of the school. Constructed of ashlar, it has a Welsh slate roof. The building follows an ordered, near-symmetrical T-plan, consisting of a five-bay main range linked to a two-bay by two-bay wing.

The architectural style is Gothic. The front features two main entrances; the one on the right is obscured by a modern single-storey addition, while the left entrance is deeply moulded and arched with an embattled cornice, above which is an elaborate carved panel of foiled circles. Windows throughout are mullioned and transomed, with the upper tier of lights featuring foiled heads. Some windows have a deep hoodmould, and others are topped with a moulded cornice on ornamental brackets. The wing has three-light windows, those on the ground floor right side being partly hidden by the addition. The end of the wing has two gabled bays of three-light windows, with a five-light canted bay on the ground floor to the left. Single lights are set in the gable apexes, and the ends of the main range have two projecting gabled bays with a similar design.

The garden front is symmetrical, with the central bay projecting and gabled, featuring a quatrefoil in the apex. It has a six-light central square bay on the ground floor, a two-light central window on the first floor with a cornice, and two-light windows elsewhere, all with hoodmoulds. Crenellated parapets, coped gables, symmetrically-arranged ornamental ashlar stacks (some with ashlar pots), and link additions to the ground floor of the left wing complete the exterior.

Inside, the hall has a tiled floor and a panelled ceiling of octagons and squares. The fireplace has tripled colonnettes with foliated capitals supporting a heavy canopy. The staircase has cusped arched panels, a pierced quatrefoil balustrade, quatrefoil newels with gableted and foliated ends, and an elaborately moulded arch supported by three clustered colonnettes. A small stained glass panel in the stair window depicts a hanging ram, a symbol of the local woollen industry. Arched doorways have panelled reveals and spandrel decoration of diverse foliage and flowers.

The house was formerly owned by the Ellis family and was converted into a school in 1906, as indicated by a tablet near the left main entrance.