Session House

Keil Parish Church, probably designed by P MacGregor Chalmers in 1898, is a simple rectangular church with four bays and a lower single bay chancel at the east gable. The exterior is made of whitewashed rubble featuring contrasting pointed long-short detailing. The entrance is located at the southwest, concealed by a projecting gabled porch with a round-headed entrance. The church has small round-headed windows, paired lancets in the west gable separated by a buttress, and a single lancet in the east gable of the chancel. There is stained glass in two windows on the north elevation, while the other windows have simple lattice pane glazing. A bellcote is situated at the east gable of the nave, and there is an apex cross at the west. The roof is slate.

Inside, the church has a plain interior with a braced timber roof.

Adjacent to the church is a session house built in 1774, which has undergone later alterations and was restored in 1988. This building is a simple single rendered rubble structure with modern glazing and a slate roof, surrounded by a simple drystone walled enclosure.