Blackadder Church, Forth Street, North Berwick

Blackadder Church, located on Forth Street in North Berwick, was built in 1844 and underwent major extensions and the addition of a tower by the architectural firm Honeyman and Keppie in 1889. This church is designed in the late decorated Gothic style and has an L-shaped plan with a tower and porch situated in the re-entrant angle. The structure is made of squared and snecked rubble with ashlar dressings, topped with a slated roof that is grey for the church and green for the spire.

On the south gable, there is an original entrance featuring a roll-moulded surround with a basket arch, complete with a hoodmould and label stops. The entrance has panelled double doors with cusped designs in the upper panels. Above this, a miniature crenellation course is positioned between flanking buttresses. The gable also features tall late decorated windows, including 3-light and 4-centred windows above, with pointed 2-light windows in the flanking bays. A string course at the eaves level steps over the central bay, and the gable is supported by angle buttresses that have pedestal and pyramid finials.

The tower is located to the east of the south gable and includes a hoodmoulded bipartite window on the south side with cusped tracery. The belfry openings on all faces of the second stage are louvred, and there are string courses above and below the pointed arch openings. The tower culminates in a pyramid spire adorned with a decorative wrought-iron finial.

To the east of the tower, there is a single-storey porch in the angle, which features three lancet windows and a carved "tree of life" panel above with an inscribed ribbon. The porch has a crenellated parapet on a decorative corbel course and is buttressed at the outer angle. The entrance on the east side consists of a 4-centred arched door set in a rectangular panel, hoodmoulded with label stops, and has double doors similar to those on the south gable.

The east gable mirrors the detailing of the south gable, while a porch to the hall intercepts at ground level to the north. The north gable features a tall, central arched panel recess with a cusped circular window.

Inside, the church has a galleried design added in 1889 on three sides, with a decorative rafter and tie beam ceiling. The communion table is located in the center of the north side, and there is an organ in a panelled case that was brought from a church in Fort William. The stained glass is unattributed, and there is a timber newel stair leading to the south gallery in the tower. The lower hall, constructed in 1879, was reconstructed for a heating plant in 1960.

Surrounding the church is a low coped parapet wall on the south and east sides, which steps down between piers and is complemented by wrought-iron gates and railings added in 1889.