Avalon House, Pant-y-goitre

Avalon House, also known as Pant-y-Goitre House, is a large three-storey building dating back to the 18th century. It is located near Pant-y-goitre. The original service wing has been converted into a separate dwelling, Velindre, which is listed separately.

The house was built of red brick but is now entirely covered with render and painted, with details in Bath limestone ashlar. The natural slate roof is concealed behind tall parapets. The building has a double-depth plan, forming a large rectangular block with a six-by-five window arrangement. The layout has been altered at some point.

The east front (the entrance front to Pant-y-Goitre) has six bays. The main entrance is in the fourth bay from the left, while a separate entrance to Avalon is in a connecting link. A projecting eight-bay colonnade of unfluted Doric columns supports a plain entablature on the ground floor. The central two bays of this colonnade are heightened with additional panels and a cornice, with the main entrance door located below the right-hand portion of this feature. The ground floor windows are six-over-six pane sashes with stone sills in plain surrounds. The first floor has six six-over-six pane sashes, and the second floor has three-by-three pane casement windows. A deep ashlar cornice runs along the top; the central section is raised to match the colonnade. A downpipe reveals that the roof has a central valley between two hipped sections, running along the five-bay axis. A chimney is located at the right-hand end of this elevation.

The north front (the original entrance front) has five bays and a seven-bay ashlar colonnade, which returns from the east. This colonnade lacks the central feature found on the east front. The window detailing on all three floors matches that of the east elevation. The eaves cornice is heightened above the three central windows.

The west front is relatively plain, with window detailing consistent with the other elevations. However, bays one and two on both the ground and first floors feature a large conservatory. The ground floor of this conservatory has a French door, and the floor above has two blind windows. Bay three has a modern French casement with marginal glazing. A plain continuous cornice runs along the top, and a chimney is located at the right-hand end of the roof.

The south elevation is largely featureless, except for a two-storey link to Velindre, the first bay of which provides the entrance to Avalon.

Avalon, which occupies the second floor of the main block, has three-by-three pane casement windows, a detail introduced in the 20th century.

The interior of the house was not inspected during a recent survey.