Penlan House (Mathan House)

Penlan House, also known as Mathan House, is a two-storey building featuring scribed rendered fronts. It has a two-window layout for No 11, a one-window layout for No 13, and a three-window layout for No 15. The building has slate roofs, which have been renewed for No 15, and very tall stone chimney stacks for Nos 11 and 13, with one stack having a stock brick flue. No 15 has a low pebbledashed stack. The eaves are boarded. The first floor has sash windows, with Nos 11 and 13 featuring four-pane designs. The ground floors have modern shop fronts, and No 11 includes a six-panel door with a splayed entrance. No 15 has a modern glazed door at the extreme right end and a splayed corner entrance supported by two cast iron pillars, with the shop front overlapping the corner.

The left end of the building is pebbledash with a modern window and a chimney stack at the rear. There is a two-storey and attic cross range at the back, also slate-roofed, which faces Market Square and has a splayed corner. The gable at the rear of No 15 features a four-pane attic window, but otherwise, this area has been modernised.

Inside, the building has been largely modernised but retains its original roof structure with chamfered purlins. There is a dog-leg staircase, with the lower part boarded and turned balusters further up. Some panelled doors are also present.