3 Ancaster Square, Callander

3 Ancaster Square in Callander is a two-storey house that dates back to the late 18th century. It is part of a row of simple rectangular houses that contribute to the streetscape and hold significant historical value. This house is located in the middle of the west side of the square, which was designed as the focal point of the planned town of Callander.

The principal southeast elevation faces the square and features a symmetrical three-bay design with openings on the first floor positioned close to the eaves. The rear northwest elevation has had the former windows in the outer bays at ground floor enlarged to create doors. The southwest side is attached to 1 Ancaster Square/57 Main Street, while the northeast side is connected to 9 Ancaster Square.

The materials used in the construction include random rubble 'pudding stone', which is exposed on the principal elevation and painted on the rear. The ground floor features noticeably smaller stones, while larger stones are found above the level of the first-floor window sill. The house has predominantly timber sash and case plate glass windows, and a pitched roof covered with grey slates, topped with a shared brick gable apex stack that has a concrete cope. Access to the interior was not obtained during the resurvey in 2004.