The building was later extended along
St Mary's Gate to the rear, and finally, along Warser Gate. In the process, this incorporated a building at the end of King's Place. Although externally, this appears to be of minor interest, this is a rare survivor of a tenement lace or hosiery factory, dating from the early 19th century, and was used at various times in its early life as a Roman Catholic chapel. These later blocks were much more plain and functional, and it is possible that they were built speculatively, perhaps for rent as tenement lace factories. Extra steam engines were installed to serve these new blocks, and massive cast-iron doors fitted at intersecting walls to prevent the spread of fire. (Some of these fireproofing doors remain
in-situ, and have become part of the fabric of the restored building). A new heating and ventilation system was installed in the later blocks, using fresh air from wall ventilators drawn over hot steam pipes. Hine continued to experiment structurally, the timber floor beams of the original building giving way progressively to cast-iron beams, rivetted wrought-iron girders, rolled-iron beams and (possibly) early mild-steel beams, as each of these materials became available. As completed, the complex had of floor space over six floors, eight principal staircases and three minor staircases. Over the intervening years many alterations were made, including the addition of new goods lifts, the replacement of the original boiler chimney, the removal and insertion of staircases, and internal conversions. On St Mary's Gate, the decorative turret and clock tower above the main entrance stairwell was replaced by a lift motor room crudely built in brick. During
World War II, concrete bomb shelters were built in the Stoney Street courtyard, obscuring the basement walls, and the occupation of the ground floor by the
RAF for parachute storage caused serious damage to the floor and chapel below. The Adams Company closed the factory in 1950, and the building was sub-divided for use by small businesses. ==Restoration and reuse==