Setback Rules for Residential Builds in Australia: Front, Side and Rear

What it is

A setback is the minimum distance a building must sit from a boundary. Front, side and rear setbacks come from a mix of state planning policy and local controls. They cap where the dwelling can sit on the block, which then drives footprint, articulation and overshadowing of neighbours. Get the setback wrong at concept stage and the whole design unwinds at lodgement.

In NSW the controls sit in the council Local Environmental Plan (LEP) and the supporting Development Control Plan (DCP). For exempt and complying development the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 sets the numbers directly. In Victoria, ResCode in clauses 54 and 55 of the planning scheme sets the residential standards, alongside the local schedule to those clauses. Queensland uses the Queensland Development Code MP 1.1, 1.2 and 1.3 for siting of class 1 and 10a buildings.

Front setbacks

Most NSW LEPs and DCPs set the front setback by reference to the streetscape rather than a fixed number. The Codes SEPP for complying development sets the minimum front setback of a dwelling house as the average of the two nearest dwellings on the same side of the primary road, on lots wider than 12.5 m. On narrower or irregular lots, fixed defaults apply.

Victorian ResCode standard A3 and B6 sets a default front setback that matches the average of adjoining dwellings on the same street, or 9 m, whichever is the lesser. The schedule to clause 54 or 55 can vary the figure. Queensland under QDC MP 1.2 sets 6 m as the standard front setback for traditional building character areas, with 6 m to a road frontage as the general default in MP 1.1 for low density residential.

Side and rear setbacks

Side setbacks scale with wall height. Under the Codes SEPP, side setbacks for a dwelling house up to 4.5 m wall height start at 0.9 m on lots under 900 m2, rising to 1.5 m and 2.5 m as wall height and lot width increase. Rear setbacks under the same code sit between 3 m and 5 m for typical lots, with 3 m being the workhorse number on suburban blocks. Battle axe lots carry their own 3 m rear setback rule from the access handle parent boundary.

Victorian standard A10 and B17 sets side and rear setbacks by a height formula. The minimum side or rear setback is 1 m, plus 0.3 m for every metre of building height over 3.6 m up to 6.9 m, then 1 m for every metre over 6.9 m. Walls on boundary are allowed under standard A11 and B18, capped on length and height.

Queensland QDC MP 1.2 sets 1.5 m as the standard side and rear setback for low density residential, with reductions allowed for shorter wall lengths and lower wall heights. Local planning schemes can vary these.

How the LEP, DCP and planning scheme stack

The LEP or planning scheme sits at the top. It is the statutory instrument. In NSW the LEP carries the principal development standards, with the DCP providing detailed controls underneath. A council cannot refuse a DA on DCP non compliance alone, but the DCP guides the merit assessment under section 4.15 of the Environmental Planning and Assessment Act 1979. In Victoria, ResCode standards live inside the planning scheme itself, so non compliance triggers a planning permit. In Queensland, the planning scheme picks up QDC siting standards as either acceptable outcomes or performance outcomes.

Reading a setback control

For each project, check four things at concept. Get the zone and any overlays. Pull the LEP or planning scheme clause that sets the setback. Pull the DCP or schedule that adds detail. Then compare to the lot dimensions and to the nearest dwellings, because front setbacks are often averaged.

Variations and trade offs

Setbacks are negotiable on merit in NSW. A DA can vary a DCP control if there is a planning reason and the variation does not compromise amenity. Clause 4.6 in the LEP allows variation of a numerical development standard set by the LEP, subject to written request. In Victoria, ResCode standards can be varied if the decision guidelines and the objective are met, so the design must demonstrate it meets the underlying purpose. In Queensland, performance outcomes give the same flexibility against an acceptable outcome.

Why it matters on site

Setback breaches caught after slab pour cost real money. Boundary surveys at peg out should confirm setback compliance against the approved plans, not the indicative ones. Where complying development is the pathway, the setback rules are strict and not negotiable, so a 50 mm encroachment can void the CDC. Pre lodgement checks with the consent authority on any averaged or merit based control reduce the risk of a refusal at the DA stage.