30 High Street, Newmilns

30 High Street in Newmilns is a classical house built in the earlier to mid-19th century. It is two stories high with three bays and has a basement due to the sloping ground. The front is made of red sandstone with ashlar detailing, while the sides and rear are constructed from rubble and harl. The front features channelled masonry at the ground level, a base course, pilaster quoins, a cornice, and a blocking course.

On the northwest elevation, there is a corniced doorpiece with two fluted columns at the center, leading up to a short flight of stone steps. The flanking bays have architraved windows, and there are small additional windows between the center and the outer left bay on both floors. The basement, which serves as a byre or stables, has large arrowslit ventilators.

The southwest elevation is attached to lower, earlier terraced houses at 26-28 High Street. The northeast elevation features a windowed gable. The southeast elevation has a tall semicircular stair tower at the center, with landing windows and a semi-conical roof, and additional windows on either side. There is also a lean-to workshop at the ground/basement level on the outer left.

The house has modern windows and a grey slate roof with flush 19th-century rooflights. There is a gablehead stack on the southwest elevation, which is absent from the northeast. The interior was not seen in 1999.