Sw, Gatepier And Boundary Walls To Nw, Robertson House (Formerly Flowergrove) Including Gate, 11 Bridgend

Robertson House is a symmetrical, mid-19th century, three-bay, two-storey house of rectangular plan. It stands within the local surroundings of Bridgend, and was for some time directly associated with the adjacent Callander Primary School (formerly McLaren School, listed separately). The house features a central door with a Greek-style sandstone doorpiece, featuring tapered pilasters supporting an entablature topped with a shallow pediment. The original side elevations were initially blank; the southwest elevation later received openings on both ground and first floors. An opening was added to the northeast elevation at some point, but was later filled in. The rear (southeast) elevation displays remnants of what was likely a central stair tower.

The house is named after Major Robertson, a prominent figure in the local community during the later 19th century. He commissioned the nearby Mission Hall and Julia Cottages (currently unlisted), and Callander Lodge (listed separately), and it is said he lived in Robertson House for a time.

Following the construction of the adjacent school in the early 20th century, the house was reorganised to include classrooms on the ground floor and teacher's living quarters on the first floor; it was likely at this time that the stair tower was added. In the 1960s, the building was reorganised to provide living accommodation for teachers on both floors, and was subsequently converted back into a single dwelling in the 1990s, with the loss of the stair tower (now replaced by a modern timber balcony).

The house has been gutted and modernised in the 20th century. The principal elevation is built with squared, tooled 'pudding stone', while the side and rear elevations use coursed random 'pudding stone'. Sandstone dressings include margins and rybats to window openings, a base course, and rybats to the outer edges. The roof is pitched grey slate, with modern roof lights on the rear. Raised ashlar skews and ashlar gable apex stacks with cans are also present. Modern timber doors and modern timber tilt-top multi-paned windows have been installed.

To the northwest and southwest are a pair of cast iron gatepiers marking the entrance to the drive. A low rubble boundary wall with an ashlar cope runs to the northwest, and a higher rubble boundary wall with rubble copes runs to the southwest.