1.2 Design coding

National Model Design Code. The National Model Design Code has signalled the importance of developing design codes on the local level. This is also supported by the 2021 reissue of the National Planning Policy Framework.

Design codes help local authorities and communities. They are a useful tool to define the developments that are built in their areas and highlight the priority issues for that area.

Design codes can cover a wide range of issues, including new developments, infill sites, conversions and extensions, street design, historic conservation, shopfront design and more.

The length and level of detail that goes into a design code depends on the size of the area and the type of development that is expected to go up.

Codes for areas with new large-scale development can focus on street layouts, hierarchy, and connectivity, while areas with existing developments can look at improving streetscapes.

Can, Should or Must. Design codes often distinguish between what must be done (mandatory design practices), should be done (design practices which are strongly encouraged except in situations where the design practice cannot be applied for specific reasons) and can be done (design practices which are recommended but whose absence will not drastically affect overall quality).

Figure 1-1: Highways and planning should work as an integrated team. As such the new National Model Design Code has been integrated within this guide.