1 Portland Road, Kilmarnock

1 Portland Road in Kilmarnock is a pair of classical L-plan dwelling houses built around 1855. They are two stories tall and have two bays, with a rear extension. The main facade is made of coursed sandstone ashlar, while the sides and rear are constructed from coursed sandstone rubble. The buildings feature a heavy base course and an eaves cornice, with architraved dressed ashlar window surrounds and skew gables.

On the south elevation, the left side of No. 1 has pilasters that form a slightly projecting door surround, topped with a flush rectangular pediment and a projecting moulded cornice. To the right, there is a window with an architraved surround. The first floor has architraved windows on both sides, with a projecting cornice and a low parapet course above.

The west elevation shows the original gable on the right, with a single-storey porch added later that conceals the ground floor. There are windows on the extreme left and right of the first floor, while the rear extension is partially hidden by an adjacent building.

The north elevation features gable ends with a wallhead stack at the center, and the gable of No. 3 is slightly more advanced. The inner returns are made of yellow brick, but the fenestration is not visible as of 2001.

On the east elevation, the original gable is on the left, with windows featuring projecting sills and margins on both storeys at the extreme left and right. To the right, the rear extension has three windows with projecting sills and margins on the ground floor, and a matching window in the outer bays on the first floor. At the extreme right of the ground floor, there are stone piers supporting a triangular ashlar pediment, leading to a timber door that opens to the rear yards. A coursed rubble wall with arched coping is located to the right.

The windows throughout are 2-pane timber sash and case. The roof is piended and covered with grey slate, featuring metal ridging, flashing, and valleys. The rainwater goods are painted cast iron, with concealed guttering at the front that drains to a downpipe on the west elevation, and painted cast-iron waste pipes on the east elevation. There are yellow brick stacks at the gable heads and rear wall heads, with a red brick neck coping on the east stack that has four octagonal cans, and narrow projecting stone copes on the other stacks, which have a mix of octagonal and terracotta cans.

The interior has been slightly altered for use as a dental practice and offices, but the original room plan remains intact.