1 Union Street

1-5 Union Street is a three-storey industrial terrace located in Penygloddfa, Newtown. The buildings feature two-storey, one-window houses with weaving lofts above. They are constructed from English garden wall bond brick, with Nos 3, 4, and 5 painted. The terrace has a gently pitched slate roof, with old slate on Nos 1 and 2, and a saw-toothed eaves cornice. No 1 has a brace plate, and there are lateral chimneys at the rear.

The weaving lofts above Nos 1 and 2 have three-light casements, while the other windows are modern. The first and ground floors of Nos 1, 2, and 5 have cross windows, with others also being modern. The windows feature cambered header arches, shallow reveals, and no sills. There is a cut window flanking the door to No 5. The doorcases are plain with brackets supporting dripboards, and the doors are modern. At the rear, there is a later continuous lean-to outshut.