Cwm Alis

Cwm Alis is a two-storey house with plain rendered walls and a slate roof featuring clay ridge tiles, hipped at the west and east ends. The building has three rendered chimney stacks and a narrow entrance front at the west end with two windows. The entrance features a deeply recessed doorway with plain pilasters, an overpanel, and a small hood, leading to a half-glazed door. The ground floor includes a 20-pane double casement window with triangular tracery, while the upper floor has 12-pane sash windows with triangular tracery.

The north elevation is very long and two-storey, with the junction between the original rear part and an extension concealed by render. A later glazed conservatory added on the north side obscures the original entrance. A date stone inscribed '1771' is present. All windows on the north side of the original house have been renewed with small-pane metal casements. The extension features a 36-pane casement ground floor window with triangular tracery. On the south side of the extension, there are three wrought-iron windows with 'Gothick' tracery in different patterns, and a reset wrought-iron first-floor window with 'Gothick' tracery at the east end of the original house.

Originally, the house appears to have been a double-pile structure, square in plan, with an entrance lobby in front of central stairs that have since been removed, and the roof valley filled in. The modern entrance, accessed via the conservatory, leads to a kitchen with a plastered ceiling beam and a wide fireplace featuring a curved timber bressumer. The living room has a fireplace with a timber lintel. The early 19th-century extension includes a library with tall casement windows and folding shutters, a sitting room with ribbed plaster coving, a 20-pane casement window with folding shutters, and round-headed alcove recesses on either side of the fireplace. The dining room has a wrought-iron 'Gothick' pointed window, and the hall features a decorative wrought-iron 'Gothick' window along with elegant straight stairs with plain square-section balusters. On the first floor in the original part of the house, there is a bedroom and bathroom with wood-boarded doors featuring plain L-hinges.