St Peter's Parish Church And Church Rooms, Princes Street, Thurso

St Peter's Parish Church and Church Rooms, located on Princes Street in Thurso, was designed by William Burn in 1832. This Gothic-style church is a wide rectangular building oriented southeast to northwest, with its entrance situated in the southeast at the base of a three-stage tower. The structure is constructed from coursed, dressed rubble, featuring tooled rubble dressings.

The tower includes a pointed-headed, hood-moulded porch at its center, with cusped Y-tracery windows on three faces of the second stage. The belfry has louvred windows with intersecting tracery on all four faces of the upper stage, and a clock is positioned on three faces below the belfry windows. The tower is supported by polygonal clasping buttresses that terminate in pinnacles. The entrance is flanked by a single bay stair projection, which is lit by a Y-tracery window on both the front and side elevations. The five-bay flanks feature windows that alternate with pinnacled buttresses. A large perpendicular traceried window is located in the center of the broad northwest gable, accompanied by smaller flanking windows, and the building has lattice pane glazing and a northwest apex stack under a slate roof.

Inside, the church boasts a shallow ribbed and bossed vaulted ceiling, along with a gallery that has a reeded panelled frontage supported by cast-iron Roman Doric columns. The interior also features a Gothic panelled pulpit, a large organ at the rear, and pews that likely date from the 1870s to 1880s.

Adjacent to the church is a later single-storey, five-bay church room that occupies the site immediately northwest of the church. This church room has a curved frontage with a central gable and bipartite windows in bays two, three, and four, with the entrance located in the southwest gable and a slate roof.

The enclosure railings consist of plain cast-iron spearhead railings mounted on a low coped rubble retaining wall. There are matching paired gates at the front, flanked by octagonal capped tooled ashlar gate piers, as well as single pedestrian gates on the sides.