No 1 Rock Terrace, including area railings

No 1 Rock Terrace is a terraced house built in the 19th century, featuring a painted stuccoed street elevation that rises four storeys with two narrow bays and a parapet topped by a coved cornice. The roof is slate and hipped with a valley. The windows are plain 2-pane hornless sashes set in moulded stucco surrounds, with the third-floor windows being plain and the other floors having shouldered surrounds and cornices on the first and ground floors. To the right, there is a recessed arched door framed by Ionic pilasters and an entablature, leading to a six-panelled door with a fanlight adorned with delicate metal tracery. The basement area is enclosed by wrought-iron railings with spearhead finials atop a low coping, complemented by a matching iron gate for the basement steps on the left. Slate steps lead down to a fixed window and a panelled door, with a coal-hole entry opposite.

The rear of the building faces the sea and is slate-hung with a parapet. It includes a four-storey, two-bay range that connects with No 2, featuring small-paned sashes: a 12-pane window on the top floor, a 16-pane window on the second floor, and a 24-pane window on the first floor that opens onto a balcony, with a French window to the left of the 24-pane sash on the ground floor.

Inside, the stair hall is located with the stair on the right wall, ascending from the end of the passage. The stairwell is narrow and open, with a single flight that curves to the first-floor landing, showcasing scrolled tread ends, stick balusters, and a ramped rail. There is a thick turned newel at the bottom and a niche in the curve. The ground floor doorcases are fluted, featuring square blocks at the upper angles. The front room facing the street is plainer, with a moulded cornice and panelled shutters, and includes an elliptical-arched recess. The large sea-front room has an elliptical-arched recess with a panelled arch and fluted pilasters, a painted slate fireplace, and decorative cornice with a leaf motif, along with a vine-trail ceiling border and anthemion in the corners. The first floor has similar panelled doors and doorcases, with a moulded cornice in the front room and a rose and honeysuckle ceiling border. A similar flight of stairs leads to the second-floor landing, where panelled doors are set in reeded doorcases. The third floor features four-panel doors.