4 Merthyr Road

4 Merthyr Road is a two-storey terrace of ten cottages that open directly onto the pavement. The cottages are constructed of narrow coursed rubble, featuring stone voussoirs above the door and window openings, with regular dressed stone quoins and rendered sides. The roof is made of Welsh slate and has narrow red brick ridge corniced stacks, each with three pots.

All units, except for number 14, which is the centre left unit, have a front elevation with a single window range and a door, with a ground floor layout consisting of two rooms one behind the other. Number 14 has a three-window range and a central door, with a central staircase. The cottages likely originally had small-pane sash windows, but now most have two-light casements on the first floor and transomed casements on the ground floor, some featuring rendered surrounds and others with slightly cambered heads; the doors have been replaced. The terrace is set behind a low masonry revetment that slopes down to the right.

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