St John's Priory, 21 St John Street, Edinburgh

St John's Priory, located at 21 St John Street in Edinburgh, is predominantly an 18th century building that incorporates earlier materials and has undergone later alterations and additions. It is a three-storey, four-bay gabled structure set back from the street, featuring a small garden at the front. The exterior is constructed of random rubble with polished dressings. Access to the building is via steps with shaped iron railings leading to a timber-panelled entrance door situated at the third bay. There is a large rendered two-storey lean-to extension and additional single-storey extensions at the rear, which were added around the year 2000.

Inside, the building retains some mid-18th century internal doors and fireplaces. A timber stair with turned balusters leads to the attic, which contains timbers dating from the 18th century. The Chapter Hall features a suite of oak furniture carved with thistles, dating from around 1950. The windows are timber sash and case with 12-pane glazing, and the roof is covered with grey slate, featuring stone skews and end stacks with clay cans.

The boundary wall surrounding the front garden is low and made of stone-coped, squared, and snecked rubble. It is accompanied by cast-iron railings and a decorative two-leaf wrought-iron gate that includes a painted shield.