Plas Grono Lodge is located at the entrance to Erddig Park from Hafod Road on the west side of the Park. It was probably built circa 1850, originally as a pair of cottages, but they have now been amalgamated to form a single house.
CADW describes the building as 'Brick with slate roofs. Symmetrically planned as a pair of houses built back-to-back: each one and a half storeyed, with 2-unit plan. Main doorways in centre of E and W elevations, each in a gabled porch with chamfered timber posts carrying cambered truss recessed behind overhanging eaves with scalloped barge-boards. These doors are flanked by single light transomed windows with latticed iron glazing bars and flat arched brick heads. Similar single central window above in wide dormer gable. Return elevation to S comprises 2 parallel gables and has outer doorways and single light transomed windows between them (with latticed glazing and flat arched brick heads). Gables have single light windows with flat arched brick heads and similar glazing; scalloped barge-boards to gables. N elevation has similar detail to the 2 parallel gables, but 2-light mullioned and transomed windows with latticed glazing and flat-arched brick heads to ground floor; similar windows above have flat timber lintels.'
It is Grade II listed 'as a good example of a simple picturesque lodge building, of particular interest for the originality of its design, in which a symmetrical pair was contrived in a building with a strongly unified design. Although now only a single house, it retains all its original external detail, and is of special interest as it forms a part of the Erddig Estate.'
Source: CADW listed buildings database.