1 Carnethie Street, Rosewell

1 Carnethie Street in Rosewell is a later 19th-century gothic house, featuring a modern conservatory on the southwest side. The building is two stories high with a three-bay rectangular plan and includes a square-plan porch at the rear. It is constructed from Whitehill brick, accented with contrasting brick and polished sandstone dressings, and has a sandstone base course and contrasting brick quoins. There is also a modern rectangular-plan rendered garage to the northwest, topped with a corrugated iron roof and a tilt door.

The southeast elevation, which is the principal facade, showcases a gabled timber porch with exposed rafters and a trefoil motif at the apex, located in the central bay. Behind the porch is a roll-moulded, architraved doorway with a boarded door and a rectangular fanlight above it. A window is positioned above this doorway on the first floor. To the right, there are bipartite windows on both the ground and first floors. On the left, a three-light canted window is found at ground level, with a bipartite window above it on the first floor.

The northwest elevation, or rear, has a regular layout with three gables and three bays. It features a square-plan porch in the central bay, with a bipartite window on the right return and a boarded door with a rectangular fanlight above it on the left return. There is a single window on the first floor above the porch, and additional windows are present in both the right and left bays, although the left bay's windows are not aligned.

The southwest elevation has a blank wall with a modern conservatory positioned to the right of center. Twin wallhead stacks are located at the angles of the platform roof above. The northeast elevation includes a small single window at ground level to the right of center, with twin wallhead stacks at the angles of the platform roof above.

Windows throughout the building include 4-pane, point-arched lying pane windows, a 4-pane segmental-arched canted window on the southeast, and a 2-pane segmental-arched window on the northeast. The roof is covered with grey slate, featuring dormers on the southeast and northwest sides, slate on the porch, and an ashlar coped flat roof on the square-plan porch at the rear. The building also has ashlar skews, ashlar coped brick stacks, and cast-iron downpipes and gutters with hoppers.

The boundary wall is made of sandstone rubble topped with a shaped rubble cope and features a replacement wrought-iron gate.