Jamestown Parish Church, Main Street, Jamestown

Jamestown Parish Church is a Gothic-style church built in 1869-70, designed by Clarke and Bell. It is laid out in a T-plan with a prominent tower and transept. The church is constructed of stugged, squared, and snecked red sandstone with ashlar margins and dressings. A base course and angle buttresses are present, alongside pointed arch windows.

The west (main) elevation features an entrance tower topped with a tall, broached ashlar spire, a broad gable to the right, and a lower bay of aisle to the extreme outer right. The two-stage tower has pinnacled pier buttresses and a tall, broached ashlar spire. A slightly advanced, sawtooth-gabled door surround contains a pointed arch door with moulded colonnettes, a boarded two-leaf door with cast-iron hinges, and a similar window on the left return. The belfry stage features a two-light, Y-traceried louvered window, breaking into the spire, a small lozenge-shaped light below, lucarnes, cruciform arrowslits at the upper stage, a corniced spire, and a weathervane. To the right of the tower, a broad pinnacled gable has four small lancets at the centre, a stepped string course, an angle buttress, and a large four-light nave window incorporating wheel tracery and a hoodmould. The transept bay is recessed to the right and features a two-light window.

The south elevation has a five-bay aisle with a gabled transept to the right, and a single-story vestry block to the outer right. The gable of the aisle has diagonal buttresses, a three-light window with a three-centred arch, and a two-light window above. Five pointed arch windows are symmetrically disposed to the right at ground level, with a clerestory above. A broad, gabled transept is advanced to the right, featuring two cusped plate traceried windows at ground level, a wheel window at the upper stage, and a pointed arch window on its return. The single-story vestry block advances to the outer right, with a gabled door clasping to the right and a Caernarvon arched window to the right.

The north elevation shows the tower to the right and a four-bay nave transept to the outer left.

The church has leaded windows and a grey slate roof with ashlar sawtooth coping to the skews.

The interior is unaltered and features an ogee-ribbed roof supported on slender colonnettes with floreate capitals. A horseshoe gallery and wooden pews are present. The communion table is at the east end, and the organ is recessed in an arch, now incorporating mechanical workings. Three stained glass windows are dedicated to the heritors.

The boundary walls, railings, and gatepiers consist of an ashlar gatepier with domed, corniced caps, a low, squared and snecked boundary wall with saddleback coping, and cast-iron railings.