Aberffraw Calvinistic Methodist Schoolroom and Chapel House

The Aberffraw Calvinistic Methodist Schoolroom and Chapel House is a two-storey building that features a full-length schoolroom above stables and a coach house. It is constructed of rubble masonry with a pebble-dashed render and has a modern slate roof. On the ground floor, there are boarded doorways at each end, with the northern doorway featuring a rectangular fanlight. Between these doors is a wide segmental-headed entry to the north and a fixed light window to the south, which has three small panes over two larger panes.

The first floor includes four slightly recessed 12-pane sash windows with slate sills, and the rear elevation mirrors this with two first-floor and one ground-floor window of similar design. Attached to the south end of the building and at right angles is the chapel house, a two-storey structure with three windows, a central doorway, and brick gable stacks. While the main windows of the house are modern, two original margin-paned sash windows remain in the east gable.

Inside, the doorway at the northern end leads to a staircase that ascends to the schoolroom on the first floor. This room features partly exposed rafters beneath a plastered ceiling and retains original simple benches and a deacon's seat at the southern end. The rear has recessed panelling with a raised central section that includes paired round-headed arched recesses, while the front is open with a plain rail supported by slat balusters and turned newels on either side of the central opening.