Although the character of the house suggests an 18th century date, Glanaber is not shown on the 1839 Tithe map, but is shown on the 1871 Ordnance Survey, suggesting that it was built in the third quarter of the 19th century. By 1899 the north wing was a separate dwelling and incorporated a butcher's shop. Old photographs show a stucco finish.

A 2-storey Georgian-style house of rubble stone with dressed stone quoins and deep window lintels (painted). A central one-window range facing east has flanking gabled wings to the north and south, the gables of which are treated as pediments with stone mouldings. The roof is slate, with stone chimneys with cornices to the central range and each cross wing. The central range has dentillated eaves, the upper storey has a single 16-pane sash window and sill band.
The doorway is offset to the right and has a painted channelled stone doorcase with bracketed cornice, and a 6-panelled door. To its left is a sash window. The left (Southern) cross wing is slightly narrower and has 16-pane sash windows in each storey. The right (Northern) cross wing has a 16-pane sash window in the upper storey, below which a central doorway (with replaced door) is flanked by small-pane windows.
The right side wall of the wing, facing the road, has a single upper-storey 16-pane sash window (and blocked windows). The lower storey has a large 20 pane window (formerly the shop), and 2 windows with replaced sash windows flanking a blocked doorway. At the rear is a single-storey extension with a horizontal-sliding sash window, and doorway, above which is a terracotta plaque with a dragon in rampant pose.

Entry is into a large central hall with ceiling beams and a large fireplace with stone lintel opposite the entrance. The dining room has a chamfered beam. The lounge has a corner fireplace (repositioned). The R-hand bedroom has a late Georgian painted fireplace with disc decoration on capitals.
(Source; Cadw listing database) S Fielding RCAHMW 19/10/2005