This area, which includes all of the area within the proposed John Street Conservation Area (SCC 2004), was first laid out with the surviving grid-iron street pattern in the late 19th century (OS 25 inch survey 1891). Development was probably first undertaken along the Bramall Lane frontage, as courtyard developments and back-to-back housing are shown on the 1891 OS survey. The construction of back-to-back housing was outlawed in Sheffield by the 1864 housing bylaws that codified minimum standards for the materials and plan form of terraced housing (Harman and Minnis 2004, 18). The 1891 and 1905 Ordnance Surveys also show the development of one the best preserved groups of late 19th century cutlery works in the city, comprising Portland, Stag, Harland, Kenilworth and Clifton Works, which all feature the distinctive architectural features of such works: cart entrances, engine houses and various workshops around courtyards, built to house the various stages and processes of cutlery production. From the 1930s onwards the housing within the area (largely along Hill Street and Bramall Lane) was cleared and replaced with further metal trades buildings (the largest being the Dominion Steel and Tool Works on Hill Street - now reused as a camping equipment and climbing centre. The later buildings are generally less architecturally elaborate with more use of structural steel and corrugated sheet materials (ibid) Historic public houses survive at the corners of this triangular area (dating form the mid 19th century to early 20th century). These add particular character to the area. Invisible legibility of earlier landscape types.