12 Merthyr Road

12 Merthyr Road is a two-storey terrace of 10 cottages that open directly onto the pavement. The cottages are constructed of narrow coursed rubble with stone voussoirs framing the door and window openings, and regular dressed stone quoins, while the sides are rendered. They feature a Welsh slate roof with narrow red brick ridge corniced stacks, each topped with three pots.

With the exception of number 14, which is the central left unit, the front elevations of the cottages each have a single window range and a door, with a ground floor layout consisting of two rooms positioned one behind the other. Number 14 has a three-window range and a central door, with a central staircase layout. The original small-pane sash windows have mostly been replaced with two-light casements on the first floor and transomed casements on the ground floor, some of which have rendered surrounds and slightly cambered heads, along with replaced doors. The cottages are set behind a low masonry revetment that slopes down to the right.

Originally, staircases rose beside the front room fireplace in most units, except for the central staircase in number 14, with some staircases still retained. There are also some stone flagged floors and slabs from former pantries, and the ground floor ceiling joists are of thin scantling, with some exposed.