How are setbacks determined under the Residential Zones Technical Specifications?

Detailed Explanation

Under the Planning (Residential Zones) Specification 2026 (NI2026–303), setbacks are determined by applying the minimum required distances between a building or structure and the boundaries of the block. Setback requirements are intended to maintain appropriate building separation, protect privacy and solar access, support streetscape character, and provide space for landscaping and planting.

The applicable setback requirements depend on several factors, including:

• the type of boundary (front, side or rear);
• the type of development (such as a single dwelling, dual occupancy or multi-unit development);
• the residential zone (RZ1–RZ5);
• the date the subdivision was originally approved, as different setback tables apply to subdivisions approved:
  • before 18 October 1993;
  • on or after 18 October 1993 but before 31 March 2008; and
  • on or after 31 March 2008; and
• the block size category, with front setback requirements varying for large, midsized, and compact blocks in the applicable setback tables.

To determine the correct setback, first identify the residential zone and type of development, then determine the original subdivision approval date and the block size category (where applicable). The relevant setback table and provisions in the Residential Zones Technical Specifications can then be used to identify the minimum required setback for the proposed development.