Trem-y-mor, with associated garden walls and walled path

Trem-y-mor is a terrace of 12 houses built in rubble stonework with slate roofs, arranged to follow the rise of the ground. At the southern end, there is a former shop and bakery, which now serves as the shop and offices of the Language Centre. The houses are two storeys high and are arranged in bilaterally symmetrical pairs, with each house consisting of one bay that includes a front parlour and a rear dining room and kitchen. Stairs rise from the front room to two bedrooms. Doors and windows were renewed after 1978, featuring framed and battened doors with overlights, and 12-pane sash windows with stone sills and lintels. Stone stacks are present on the party walls, and each house has a small front garden raised behind a stone retaining wall.

The administrative building, formerly known as Bay View, is positioned higher and features an end bay that forms a cross wing, visually terminating the terrace. It has a steep pitched roof that is gabled at the front. The front of the building has large windows, and the southern side elevation includes five bays with similar 16-pane and 12-pane windows on both levels. The houses are now named, some after sponsors, from north to south: (admin), Arfon, (no name), Ty chwareon, Llandaf, Cwrlwys, Caerffili, Nant-y-ffynnon, Glyn Rhosyn, Ty Ynys Mon, Meirionydd, Maldwyn, and (no name).

The interiors of both the houses and the administrative building were completely modernised in 1987.