Are you planning a modern rear extension or adding a second story to your Melbourne home? Victoria’s ResCode regulations govern exactly how close, how high, and how open your new design can be Victoria Department of Transport and Planning. The following are some critical issues in Rescode explained.
When inner-Melbourne homeowners extend, they often run into Clause 54 (for single dwellings) and Clause 55 (for multi-dwelling developments) of the local planning scheme Victorian Planning Provisions. Overlooking and overshadowing are the two most common triggers for bitter neighbour disputes and costly council delays.
Understanding these strict architectural rules ensures your design gets approved by local councils—like the City of Yarra, City of Stonnington, or City of Boroondara—without compromising your lifestyle.
THE OVERLOOKING LAW: CLAUSE 54.04-6 & 55.04-6 (SIDE AND REAR SHADOWS)
Melbourne’s overlooking laws do not protect views of a neighbour’s roof or front garden. They strictly protect habitable room windows and the secluded private open space (SPOS)—like a backyard deck or courtyard—of adjoining properties.
- The 9-Metre Radius: Any window, balcony, or raised deck with a floor level more than 800mm above ground must be screened if it looks into a neighbour’s SPOS or bedroom/living window within a 9-metre horizontal trajectory.
- The 45-Degree View Cone: The view is measured from a direct line of sight and extends out in a 45-degree arc.
- Architectural Screening Solutions: If your second-story master bedroom overlooks next door, you must use fixed obscure glazing to 1.7m above floor level, high sill windows, or fixed external timber/metal louvres with a maximum of 25% transparency.
THE OVERSHADOWING LAW: CLAUSE 54.04-5 & 55.04-5 (SOLAR ACCESS TO OPEN SPACE)
Melbourne’s weather makes sunlight a premium commodity, meaning sunlight protection for neighbours is strictly enforced. The law dictates how much shadow your extension can cast on your neighbour’s backyard.
- The Key Testing Date: Overshadowing is calculated specifically for the Equinox (September 22) between the hours of 9:00 AM and 3:00 PM.
- The 75% Sunlight Rule: If your neighbour’s secluded private open space is greater than 40 square metres, your extension must ensure they still receive a minimum of 5 hours of sunlight to at least 75% of that area (or 40 sqm, whichever is lesser).
- Pre-existing Shadows: If a boundary wall already heavily shadows your neighbour’s courtyard, your new extension cannot significantly worsen the existing solar access profile.
- Computerised Shadow Diagrams: To pass council, your architect must generate precise 3D solar studies mapping the exact path of your extension’s shadow across the Equinox hours.
HOW TO AVOID MELBOURNE NEIGHBOUR DISPUTES DURING PLANNING
Failing to design with ResCode in mind leads to formal objections during the council advertising phase, lengthening your permit timeline by 6 to 12 months.
- Step-by-Step Compliance Navigation:
- Commission a Feature Survey: Get a licensed surveyor to map the exact window locations, ridge heights, and private spaces of your immediate neighbours.
- Step-Back the Second Story: Designing upper floors with a tiered setback reduces both the visual bulk and the shadow footprint cast onto southern boundaries.
- Consult Neighbours Early: Presenting your architectural shadow diagrams and screening concepts to your neighbours before formally lodging with council builds trust and prevents future legal challenges at the Victorian Civil and Administrative Tribunal (VCAT).
SMART ARCHITECTURE SOLVES RESCODE CONSTRAINTS
Strict ResCode compliance does not mean your extension has to feel like a closed-off bunker. Professional architectural design bypasses ugly frosted glass windows by utilizing highlight windows that flood your home with northern sunlight while angling views completely away from the boundary line.
Clever courtyard cutouts, internal lightwells, and angled architectural fins allow Melbourne extensions to feel expansive, light-filled, and completely private, all while remaining fully compliant with state planning laws.
Are you currently dealing with a tight inner-city block or a concerned neighbour regarding your upcoming Melbourne home extension?
