Carlton House

Carlton House is a villa located on Mowbray Road in Sunderland, built in 1850 by architects J & B Green for Alderman William Nicholson, a supplier of copper, brass, and iron fittings for ships. At the time of listing, it was used as accommodation for polytechnic students. The building features ashlar stonework with brick additions at the rear and has a Welsh slate roof with ashlar chimneys and gable copings, designed in a Tudor style.

The garden front is two stories high and has a symmetrical arrangement of windows, with two windows on the left, one narrow set-back bay on the right, and a central bay that projects under a gable. The fourth bay contains a buttressed projection with a Tudor arched surround leading to a renewed glazed four-panel door, complete with a mullioned overlight and gablet. The left bays feature paired ground-floor windows and two upper windows beneath gablets, each adorned with flower-carved hoodmoulds. The prominent third bay has a full-height canted bay window topped with a coped parapet, and its gable peak includes a single light with a hoodmould resting on moulded kneelers.

The steeply pitched roof has two parallel ridges and one cross ridge, with tall, corniced, panelled stone chimneys. All gables are finished with roll-moulded copings and obelisk finials. The main entrance is located in the left return, featuring two gables, one of which covers a projecting entrance bay with a moulded open arch. The entrance includes a recessed half-glazed four-panel door set in a Tudor arch, flanked by narrow sidelights with sloping sills, and an oriel window above with carved motifs of a rose, thistle, and shamrock on its bracket. The second gable has a central stepped chimney projection displaying carved Gothic lettering that reads "WM" and "1850," alongside a heraldic device.