107 High Street, Montrose

107 High Street in Montrose is an early 18th century, 2-storey, 7-bay rectangular-plan house that is connected to the 3-storey, asymmetrical, L-plan house known as "Boswell House." The exterior is finished in painted rubble stone with plain margins.

On the south elevation of the 2-storey house, there are 2 bays at the extreme left featuring a door, and 5 bays to the right with a central pilastered doorpiece. Above this doorpiece, there is a window offset to the left. To the left, there are 2 bays with a single enlarged window on the first floor, and to the extreme right, there are 2 bays with an altered window on the first floor, along with a dormer to the right.

The west elevation of Boswell House is asymmetrical with an altered ground floor. It has a window at the center with a cill at ground level, and doorways in the re-entrant sections to the left and right. There are windows on the first and second floors to the right, and an advanced harled gable end to the right.

On the north elevation of Boswell House, there is a single bay wing with windows on the first and second floors, and 2 doors at ground level. Adjoining this is a single-storey, 4-bay building (No 111) that extends westward, forming a courtyard.

The east elevation of Boswell House is also asymmetrical, featuring 4 bays with 3 windows on the first floor, one of which is blocked. There is a door to the left at ground level and a single-storey, single-pitch addition extending eastward.

The property features a variety of timber sash and case windows and has a grey slate roof. The 2-storey building has a brick gablehead stack to the east and a later brick ridge stack at the center. Boswell House has a rendered ridge stack at the center and a gablehead stack to the north, along with a capped semi-external stack on the gable end of the single bay wing and stone skews.

Inside, the houses are connected. In Boswell House, there is 18th century fielded panelling in the first-floor bedrooms to the north and south, and in the second-floor bedroom at the center, which features a screen wall with a 4-pane fanlight. There is also a large open chimneypiece with a moulded stone surround in the center room and in the room to the north on the ground floor, as well as in the room to the north on the second floor. The 2-storey house has been converted into ground and first-floor flats, with access to the upper flat via the main entrance door at ground level and an internal connecting door to Boswell House. Fielded panelling is present in 2 rooms on the first floor.

The boundary walls are made of rubble stone and form a garden to the east.