18-25 John's Lane, Leith, Edinburgh

18-25 John's Lane is a mid 19th century warehouse that was reduced in height from three storeys to two, likely in the late 19th century. The building features a two-storey, 16-bay structure with a three-storey, three-bay centre block. It is constructed from grey sandstone, with coursed and squared rubble and droved dressings, while the rear is made of coursed rubble.

The east elevation showcases the three-storey, three-bay gabled centre block, which includes a wide doorway and blocked hoist doors above, along with a small pointed-arched loft or joist opening at the gablehead. The outer bays have barred windows, and there are tie-plates between the ground and first floors, as well as between the first and second floors. To the south, there are seven bays, and to the north, six bays with irregular openings, many of which have been altered or blocked.

The west elevation has a slightly advanced centre block similar in detail to the east elevation. It features three bays on the right with blocked segmental-arched cart openings at the ground floor and single windows above on the first floor. The wallhead has been built up into a tall brick parapet screen that turns the corner to the west, enclosing a cobbled courtyard behind the warehouse, which is located behind No 91 Constitution Street. The bays to the left have bricked-up openings.

The north elevation is gabled with bricked-up hoist doors in the centre, and the outer windows have also been bricked-up, except for the second-floor windows, which are blocked in rubble and truncated by a skewline due to the height reduction.

The south elevation features a small round-arched hoist opening at the gablehead. The building has barred windows with timber casements and a grey slate roof with a metal ridge, along with a short wallhead stack to the right of the east gable.

Inside, the structure is supported by cast-iron columns and timber beam construction.