St Paul's House and attached railings and gates

A factory and showrooms, now offices, was built in 1878 and significantly altered and restored with a new interior in 1976. Designed by Thomas Ambler for John Barran, the building is constructed of brick with terracotta by Doulton and features wrought-iron gates by Frances Skidmore. It is four storeys high, with an added attic storey, and comprises twelve bays, five wide, with an angled entrance bay at the south-east corner which was blocked in 1976 with a window inserted, and a central entrance added on the north side, facing Park Square.

The building is in an ornate Hispano-Moorish style. The blocked corner entrance features a Moorish arch and paired flanking columns, with walls lined with glazed tiles. The elaborate entrance gates, featuring ribbon-like scrolls and flowers, were reduced in height and relocated to the north entrance in 1976. The facades use a repeated bay design; ground and mezzanine windows are united within a large segmental arch of moulded terracotta. First and second floors are similarly linked, with a giant trabeated frame forming a transom at the intermediate floor level and Moorish colonnettes serving as mullions. The third floor has triple Moorish arches to the lower windows, with bands of cusping at the eaves. The building has a brick and terracotta parapet pierced with cinquefoil openings. Attached octagonal buttresses at the corners rise above the parapet as elaborate corner finials in the style of minarets, and these were restored. The exterior also has brick and stone piers, with cast-iron panels featuring star motifs repeated on all facades.

The interior has not been inspected. John Barran was instrumental in developing Leeds as a wholesale clothing manufacture centre, and the factory's location in Park Square reflected this significance in the development of the clothing industry. He served as Mayor of Leeds and as a Member of Parliament from 1876 to 1885. Ambler also designed many buildings in Boar Lane. The building represents a rare example of architecture influenced by the publication of Owen Jones’ measured drawings of the Alhambra in the 1840s.