Congregational Church, Castle Street, Thurso

The Congregational Church on Castle Street in Thurso was built around 1875. It is a rectangular church featuring a gabled entrance facing Castle Street. The exterior is constructed of coursed, tooled rubble with tooled ashlar dressings. The entrance has a hood-moulded pointed head, with moulded jambs and a double leaf plank door that has decorative cast-iron hinges. This entrance is flanked by long pointed-headed windows that are linked by a continuous hoodmould. Above the entrance is a large hoodmoulded rose window with geometric tracery and a small apex vent. The church has four bays on the sides, each with simple, long pointed-headed windows that have lattice pane glazing. Notable architectural features include pronounced skewputts, cast-iron apex finials, and a slate roof.

To the east of the church is a single-storey gabled hall wing, built at the same time. This wing has pointed tripartite lights on the southeast gable and bipartite lights on the northeast gable facing East Church Street. It shares similar detailing with the church and has a corniced wallhead stack.

The church is enclosed by low coped rubble walls along Castle Street, which feature a pair of central ashlar octagonal gate piers topped with shallow octagonal caps. These are linked to similar terminal piers by cast-iron railings, which include a matching pair of pedestrian gates. Plain coped rubble walls also front East and West Church Streets.