Church of St John the Evangelist with attached churchyard wall and gateway

The Church of St John the Evangelist, together with its attached churchyard wall and gateway, was built between 1840 and 1842 by George Wightwick of Plymouth, for E.W.W. Pendarves. It was restored in 1880 and altered in 1899. The church is constructed of snecked red killas rubble with granite ashlar dressings, and has a slate roof.

The church is in the Early English style, featuring chamfered lancet windows. The six-bay nave has clasping pilasters to the corners and lesenes, with a tall window in each bay except the first on the south side, which has a gabled porch with a two-bay colonnaded side entrance protecting a two-centred arched doorway. Stone gutters sit on square corbels, and the roof has coped gables. A stepped triple lancet window is set into the west gable, with a gable bellcote above. The small, one-bay chancel has clasping pilasters and a stepped triple-lancet window. A coped gable rises to a large apex cross. A small chapel is located in the south angle, with a small lancet window in its east wall and a monopitched roof. A gabled vestry was added to the north side, coupled with the transept; the windows in the gables of these sections are set within hoodmoulds.

The interior features a wagon roof supported by large queen-post roof trusses. These trusses are supported on corbelled wallposts with arch-bracing to the tie-beams, alongside slender intermediate posts and ogival passing braces. A two-centred chancel arch and window surrounds are constructed of plain rubble, suggesting a previous plaster covering. Two-centred double-chamfered arches lead to the transept, vestry, and chapel, and then to the transept. Remains of the head of the window that the transept replaced are visible. Above the south doorway is a blocked window, alongside a hatchment bearing the motto "NEC TIMEO NEC TUMEO." A blocked doorway in the north wall of the chancel once led to a smaller vestry. The south chapel features an altar stone dating from between 1000 and 1050, bearing the inscription “Aegured” and a rectilinear pattern enclosed by a T-fret border. A 15th-century font, originally from Camborne church, is also present, featuring four angels holding shields.

The churchyard wall, attached to the vestry and transept on the north side, runs around the west end and then eastwards to the corner of the porch. It is constructed of coursed squared rubble with granite ashlar piers and coping. Wrought-iron gates are set within the wall. The low wall has chamfered coping. The gateway on the north side has tall, square, monolithic piers with cross-gabled caps, and gates which each have two panels of scrolls and a cross on the top rail. Matching piers are located to the left and right, and at both corners of the west end, with a simpler gateway opposite the nave.

The church forms part of a small model village built between 1840 and 1845 by E.W.W. Pendarves of Pendarves, on the site of the former hamlet of Treslothan. It was built as a Chapel of Ease for the south-west portion of the parish of Camborne.