Westgate Co-Operative Society, 25-35 Main Street, Newmilns

The Westgate Co-operative Society building, located at 25-35 Main Street, Newmilns, was constructed in 1900 and designed by Gabriel Andrew. It suffered fire damage in 1908 and was subsequently rebuilt. The building is a two-story structure with an attic, built of red sandstone in a Free Renaissance style, and occupies a triangular plot.

The Main Street elevation features a tower on the left corner, connected to a symmetrical 12-bay frontage. The ground floor now contains modern shop fronts, with the exception of the end bays, which retain round-headed doorways. These doorways have flanking banded Ionic pilasters on polished pink granite plinths and base courses. Above the pilasters is a pulvinated band followed by a moulded cornice with an open round-headed pediment. The banding on the pilasters extends into the moulded architrave surrounding the doorways, executed in a Gibbs surround manner, and is finished with a double keystone. The doorways themselves have a two-leaf design, featuring six panels, a dentilated cornice, and a timber-framed fanlight. A moulded cornice above the doorways continues along the front, advancing at the centre bay, which incorporates a three-light pilaster mullioned oriel window at the first floor, flanked by plain pilasters. A heavy moulded cornice separates the first floor from the attic, which is lit centrally by a mannered round-headed dormer with mullioned and double transomed windows, incorporating a curved balcony, flanking pilasters, and a heavily moulded cornice.

The elevation facing Kilnholm Street exhibits a similar treatment but is simpler and asymmetrical. It includes two pedimented bays, mirroring the front elevation, with architrave bipartites on the first floor. A door is located in the left-hand bay, and a small window with a lugged architrave sits to the left of the corner tower. Another pedimented bay is positioned seven bays beyond. First-floor windows in the intervening bays and those three bays beyond are treated similarly to the Main Street front, with the exception of the third bay from the right, which has a plain-architraved and corniced window.

The roof is slated with gables and transverse wallhead stacks featuring moulded cornices and copes. There are four segment-headed windows on each side of the central feature, separated by Ionic pilasters and surmounted by a plain frieze below the cornice extending from the central feature. A blocking course with a cavetto moulded cope is present, along with a moulded cill band. The roof is Mansard style, incorporating pedimented dormers that alternate between triangular and segment-headed forms. The end bays, above the entrances, feature single windows with lugged keystoned architraves and cornices, topped by triangular pediments with a mannered crenellated parapet.

The corner tower is blind on the ground floor and curved, featuring a granite base course. It corbels outwards to an octagon below the cornice, connecting with the main elevations. Corbels continue upwards as pilasters through the cornice and cill band. The tower has two plain windows on the bow at the first floor and small rectangular windows below the head of the tower, where it corbels outwards, with a scalloped parapet and a moulded cope. Curved ribs run from the cope to a drum cupola, capped with a lead ogee roof.

In 1991, some upper window frames were replaced with protective screens, and some shop fronts were boarded up.