Glenpark House, Glenpark Drive, Port Glasgow

Glenpark House is an early to earlier 19th-century classical house with a substantial rear addition dating from the late 19th to early 20th century, along with later additions and alterations. The property is an asymmetrical, near L-shaped complex consisting of a symmetrical, two-storey principal block with a basement and attic, and a taller block adjoined to the rear, featuring an engaged polygonal corner tower.

The principal block is constructed of cream sandstone ashlar, with a band course at ground level, a sill course at the first floor, and corniced eaves. Narrow quoin strips, finialled at the front, and giant order pilasters dividing the bays beneath a pediment are also present. The polygonal tower has a ground floor band course, corniced lintel courses at ground and first floor levels, corniced eaves, and pilastered mullions at the upper floor.

The northeast (entrance) elevation displays a sandstone stair leading to a projecting, flat-roofed porch centred at ground level. The porch has angle pilasters, corniced eaves, and a balustraded parapet. A tripartite window is centred at the first floor, beneath a finialled pediment. Single windows are in the flanking bays at all floors, with canted dormers above. A recessed block to the left has single windows at basement, ground and first floor levels. A regularly fenestrated polygonal tower is adjoined to the outer left, surmounted by a finialled cupola.

The southeast (side) elevation shows the principal block on the right with an irregularly fenestrated gable, and steps to a projecting porch recessed to the outer right. The taller, projecting block adjoined to the left has a regularly fenestrated polygonal tower to the right, with a shallow pediment and wallhead stack above a range to the left.

The southwest (rear) elevation features a bowed ashlar bay to the original circa 1900 block, positioned to the left of centre. This is abutted by a later lean-to stair tower and a single-storey projection at ground level.

The northwest (side) elevation displays two regularly fenestrated bays of the early 19th-century block on the left, and two irregularly fenestrated bays of the circa 1900 addition to the right. The circa 1900 addition features a Diocletian window at first floor level to the left, with a four-light window above, and a pedimented ornamental panel at the foot of an expressed chimney breast, with indicated flues formed with strip pilasters.

The windows are predominantly timber sash and case with plate glass. The roof is covered with grey slate, with stone-coped skews. Corniced sandstone wallheads and apex stacks are present, with predominantly octagonal cans.

Internally, several original features, including a mahogany staircase, were reportedly in place in 1999.