1 Mill Street

Nos 1-4 Mill Street is a terrace of four estate cottages built in the third quarter of the 19th century, specifically designed as one-and-a-half storey homes for Lord Penrhyn after he acquired the estate in 1856. The cottages are constructed from rubble and feature shallow-pointed slatestone lintels above the ground floor openings. They have a continuous slate roof with a tiled ridge and deep verges.

Each pair of cottages shares a two-stage chimney, with a rendered lower section and a stone upper section, both adorned with plain cornice bands. The design includes one-window reflected pairs, with cottages 1 and 4 having outer entrances, while cottages 2 and 3, the central units, have inner entrances. The doors are half-glazed and from the 20th century, while the ground floor windows are 6-pane sashes with projecting cills, dating from the 19th century.

The upper windows are also 6-pane sashes and are set within mid-20th century flat leaded dormers that break the eaves. At the rear, each unit features a modern door and window combination, along with paired modern dormer windows on the upper floor.