'Annesley Mansions' ('Newcastle Centre'), 10-12 Central Promenade, Newcastle, Ballaghbeg, Co Down, BT33 0AA

Annesley Mansions is a two-storey building over basement with a hipped roof, dating from approximately 1832–33, displaying distinctive late Georgian character. It stands on the east side of Central Promenade in Newcastle, Ballagheg, with its rear facing the shore.

The building originated as two separate structures: a hotel (designed by Thomas Duff) and a house with estate office. These were amalgamated around 1865–70 to create the long, largely rectangular structure visible today. A large modern leisure centre block was added to the rear in 1987, connected to the original building via a glazed corridor. The property now functions as a civic centre with leisure facilities and a tourist information centre.

The long western front façade can be divided into three sections. The southern section is the original hotel block façade, which is symmetrical and organised into three bays. The central bay is slightly recessed and contains a large projecting flat-roofed entrance porch at ground floor level. The porch front is open, flanked by Ionic columns and double outer pilasters, with plain sides punctuated by respondent pilasters. It is topped with an entablature, cornice and blocking course, above which sits a decorative cast iron balcony rail. Plastic lettering has been affixed to the front of the entablature and blocking course. On either side of the porch are four tall fixed-light windows with Georgian panes. The outer windows sit within the outer bays of this section. The first floor carries nine similar but shorter windows, with the centre (fifth) window being broader than the rest.

Immediately north of the hotel façade is the in-fill section, added during the 1860s amalgamation. This has three tall sash windows with Georgian panes (6 over 6) to the ground floor and three similar but shorter windows (6 over 3) to the first floor.

The northern section, belonging to the former house and estate office, presents an asymmetrical façade. To the right of the ground floor is a large elliptical arched entrance, approached via a short walkway spanning the basement well. The entrance features a modern glazed door, sidelights with panelled aprons and a large elliptical fanlight. To the left of this entrance are three ground floor windows with sash frames and margin panes. The first floor carries four similar but shorter windows.

The entire front façade is finished in lined render with chamfered quoins to the outer bays of the former hotel section and painted quoins to the former house section. String courses run between ground and first floors and between basement and ground level. The basement level features a series of windows: those to the former hotel section are now blocked (though their recesses remain), while the remainder to the north retain sash frames (2 over 4) with security grilles.

The short north façade has three recesses to each floor, originally windows but now blocked. Finish is as the front. The short south façade is slightly narrower than the north, with two window openings to each floor; basement openings are blocked, while ground floor openings match those of the front façade.

The rear façade of the original hotel section follows the bay arrangement of the front. The centre of the recessed middle bay projects as a square bay, now largely engulfed by the modern glazed corridor connecting to the 1987 leisure centre block. The left (south) side of this projecting bay contains four first floor windows and three ground floor windows matching the front arrangement, with one additional opening converted to a doorway. The right side has four first floor windows and three ground floor windows, with another opening made into a doorway. Basement windows appear largely blocked. Modern catwalks and stairways span the basement well to the two rear doorways, which are plain modern examples.

The rear façade of the in-fill section (north of the hotel section) features a two-storey canted bay to the left with a hipped roof. Each face of each floor of this bay contains a window, except the centre face at ground floor level, which has been converted to a doorway. Window frames correspond to those at the front left. To the right of this bay is a window to each floor.

The rear façade of the former house and estate office section carries four windows to the first floor and three windows plus a doorway (converted from a former window) to the ground floor. The windows correspond to those on the front of this section; the doorway is modern. The basement level of this section and the in-fill section has four windows with sash frames (2 over 4) and a doorway with modern door. Basement windows to the canted bay are blocked. Modern walkways and stairs serve both rear sections.

The entire rear façade finish matches the front. The roof is hipped and covered in natural slate. There are five granite chimney stacks with octagonal pots (originally ten). Cast iron rainwater goods are present. The basement well is enclosed by railings to the front, north and south sides, partly set on a low wall; the left half of the front and the north sections retain original railings, while the remainder are modern. A modern metal staircase provides access to the basement well at the front. Wheelchair ramps approach the front doorway to the former house and estate office.

Across the road and slightly north of Annesley Mansions stands a long one-and-a-half storey building, formerly the hotel's stable block. It features a gabled roof and rendered façade, with a taller gabled bay in the centre containing a large arched carriage doorway. The building has been substantially altered in recent times with the insertion of numerous large openings to the front and removal of all gabled half dormers.