Mostyn Crescent comprising: The Marine Hotel & Nos 1-13 (Consec) including forecourt walls

Mostyn Crescent comprises a mid to late 19th-century terrace of four-storey buildings, with the Marine Hotel at the west end and Nos. 1 to 13 extending eastward. The Marine Hotel has expanded to incorporate Nos. 1 to 3 and Nos. 4 to 6.

The north elevation of the Marine Hotel facing Mostyn Crescent features stuccoed walls with quoins, an eaves cornice with modillions and dentils and band, and a slate hipped roof. The ground floor has a modern glazed verandah. Three pedimented dormers crown the roofline. The first floor contains a central bay with a triple window, pilasters and an entablature with dentils, flanked at each end by canted three-light bay windows that descend to the basement. The second floor has three triple sash windows with pilasters, a tiled band at window heads and cornices. The third floor is lit by three segmental-headed sash windows. A stuccoed forecourt wall with a balustrade featuring turned balusters and piers runs before this elevation.

The west elevation of the Hotel, facing Vaughan Street, is executed in the same style with eight windows in total. Two pedimented dormers sit within a steeply pitched roof on the right. The top floor has segmental sashes. The second floor contains triple, double and single sash windows in similar style to the front. The first and ground floors feature, from left to right: a splayed bay window descending to basement; a broad bay with corner pilasters housing an entrance on the ground floor; a tripartite window with pediment above a splayed bay below; a narrow bay with windows on each floor; a splayed bay window descending to basement; a narrow window on each floor; and a tripartite window with pediment above a splayed bay below.

No. 1, now part of the Marine Hotel, is a four-storey building of two bays with a slate roof. Sash glazing is throughout. The third floor has small sash windows with flanking brackets descending from the eaves and a stringcourse at cill level. The second floor features sash windows with moulded architraves. The first floor contains, to the left, a wide storeyed canted bay window of four lights descending to ground floor, and to the right, a large rectangular bay window. The ground floor is open to a modern glazed verandah shared with the main building. Stuccoed forecourt walls with balustrade and turned balusters match those before the main hotel building.

Nos. 2 and 3, also now part of the Marine Hotel, follow the pattern of No. 1 on the third and second floors. Each has, on the first floor left-hand bay, a storeyed canted three-light bay window descending to the basement. In each right-hand first-floor bay sits a sash window with moulded architrave and cornice on consoles. At ground-floor level in each right-hand bay, a flight of steps leads up to a round-headed doorway with panelled spandrils and pilasters.

Nos. 4, 5 and 6, formerly the Regent Court Hotel and now part of the Marine Hotel, are similar to Nos. 2 and 3, though the top floor has modern glazing. No. 4 has a dwarf stuccoed forecourt wall with one pier. Nos. 5 and 6 share a dwarf forecourt wall with balustrade and two piers.

No. 7 follows the same pattern as Nos. 2 to 6, with a dwarf stuccoed forecourt wall and two piers, though the door is modern.

No. 8, Hotel Penelope, is similar to Nos. 2 to 7 but retains an ironwork balcony before the first-floor right-hand window.

No. 9 follows the established pattern and has a low stuccoed forecourt wall with turned balusters and two piers flanking the entrance, with one pier at the right-hand end.

No. 10, Belvedere Hotel, is similar to Nos. 2 to 9 but features modern glazing.

No. 11, Glen Ormes Hotel, is similar to Nos. 2 to 10. It has modern glazing and third-floor windows with pointed heads. Iron railings separate it from No. 12.

Nos. 12 and 13 project forward and differ in style from the rest of the terrace. These four-storey buildings occupy three bays, with No. 12, Kinmel Hotel, in the right-hand two bays and No. 13, Shelbourne, in the left bay. The central bay projects further and is crowned by a triangular pediment. A modillion eaves cornice runs across the front, with quoins at the ends below the second floor. The third floor contains plain segmental-headed sash windows with a stringcourse across the front sill level: one in the centre bay and two in each end bay. The second floor has a tall triple sash window in each bay. The first-floor centre bay features a three-light window with cornice on consoles. A prostyle stuccoed porch with pilasters and modillion cornice occupies the ground floor. The left return of No. 13 comprises three bays with five camber-headed sashes to the top floor, three paired round-headed windows to the second floor, and on the first floor a central single-light window with cornice flanked by two-light windows with pediments. A modern single-storey extension adjoins this return. Iron railings separate Nos. 12 and 13. No. 13 has a low stuccoed dwarf wall with balustraded parapet featuring turned balusters.