12 Buchanan Street, Glasgow

12 Buchanan Street in Glasgow is a commercial building designed by James Thomson of Baird and Thomson in 1889, showcasing Venetian Renaissance architecture. The structure is four stories tall with a modern attic and features five bays facing Buchanan Street and six bays on the side that returns to the lane. The exterior is made of ashlar stone, while the ground floor has been altered for modern shops.

The Buchanan Street elevation displays pilastered first and second floors, with single outer windows and a central four-light shallow lozenge bay. The first floor has a central Ionic columnar mullion that is waisted and decorated with anthemion motifs, while the three mullions on the second floor are similarly detailed. The third floor features swagged Ionic capitals supporting a colonnade, with arched keystoned heads and sculptured swags in panels along the parapet. The modern attic disrupts the original design, which included a formerly panelled parapet.

On the side elevation, the first floor is pilastered, the second floor has panelled pilaster strips, and the third floor is arcaded with a consoled cornice. There is a central tripartite dormer with a pediment set in the panelled parapet. The roof is pitched slate with a platform section. The sash and case windows feature a plate-glass glazing pattern.