Granny Flat Guide Victoria: Rules, Costs & Approvals (2026)

Secondary dwellings in Victoria

In Victoria, a granny flat is referred to as a dependent person's unit or, more broadly, a secondary dwelling. Terminology and planning rules depend on your zone, overlay, and local planning scheme.

Unlike NSW, with its state-wide streamlined pathway, Victoria's approach is largely council-driven, so rules, processing times, and outcomes vary significantly by municipality.

The Victorian Government has been working on housing supply reforms that affect secondary dwellings. Check the Department of Transport and Planning website for the latest policy position.

Planning permit requirements

In most Victoria areas, building a secondary dwelling requires a planning permit from the local council. The process:

1. Lodge a planning permit application with supporting documents (plans, site analysis)
2. Council assessment, which may include a neighbour notification period
3. Council decision, approval, approval with conditions, or refusal
4. If approved, obtain a building permit before commencing construction

Some minor secondary dwelling proposals may be exempt under ResCode or council by-laws. A planning consultant or council planner can advise on whether your project is exempt.

ResCode and planning overlays

ResCode is Victoria's state-wide residential development code, setting standards for setbacks, site coverage, overlooking, overshadowing, and open space. All secondary dwelling proposals must comply with ResCode (or receive a variation).

Common overlays affecting proposals:

• Neighbourhood Character Overlay (NCO): May restrict design or height
• Heritage Overlay: Heritage-sensitive design and officer approval required
• Flood or Bushfire Overlay: Additional assessment, may restrict development
• Vegetation Protection Overlay: Limits tree removal needed for construction

Check the Planning Maps Online tool (planning.vic.gov.au) to identify all overlays applying to your property before starting design.

Lot size and zone requirements

Victoria has no universal minimum lot size for secondary dwellings. Requirements vary by zone:

• General Residential Zone (GRZ): Most common in established suburbs. Secondary dwellings generally permissible with a planning permit. Councils typically expect lots of at least 300 to 400m² for attached, more for detached.
• Neighbourhood Residential Zone (NRZ): More restrictive. May limit dwellings per lot and impose stricter design requirements. Sometimes prohibits secondary dwellings, check your council's scheme.
• Residential Growth Zone (RGZ): Encourages higher-density. Secondary dwellings more readily approved.

Contact your council's planning department early to understand your site's development potential before spending money on design.

Building costs in Victoria

Construction costs in Victoria are broadly similar to NSW but can be higher in inner Melbourne due to land constraints, builder demand, and heritage requirements.

Additional VIC-specific costs to budget for:

• Planning permit application fee: $1,000 to $3,000+
• Planning permit consultant: $3,000 to $8,000 (recommended for complex sites)
• Heritage report: $2,000 to $5,000 (if heritage overlay applies)
• Soil and drainage report: $1,000 to $2,000

How long does approval take?

• Simple applications (no objections, no overlay): 2 to 4 months
• Notifiable applications (neighbour notification): 4 to 8 months
• Complex applications (overlays, objections, VCAT appeal): 12+ months

After the planning permit, you still need a building permit before construction. That adds another 4 to 8 weeks.

Versus NSW's CDC pathway (typically 2 to 4 weeks), Victoria's planning process is meaningfully slower. Factor this into your project timeline and budget.

Growth corridor opportunities

Melbourne's urban growth corridors (Werribee, Melton, Cranbourne, Epping) are zoned for higher-density residential development. Secondary dwellings tend to be more readily approved because:

• Lots are often designed for dual occupancy from the outset
• Growth zones typically have simpler planning overlays
• Councils in growth corridors have established secondary-dwelling processes

Rental yields in outer growth corridors are typically lower than established inner and middle suburbs. Weigh up the cost savings on approval against the lower income potential.

Rental potential in Victoria

Rental returns for secondary dwellings in Melbourne:

• Inner Melbourne (5 to 15km from CBD): $350 to $550/week for a 1 to 2 bed dwelling
• Middle ring suburbs (15 to 30km): $280 to $420/week
• Outer growth corridors: $250 to $360/week

Given higher construction costs in Victoria (planning complexity), yields tend to be slightly lower than NSW on a cost basis. Still, secondary dwellings remain a popular strategy for Melbourne investors. Use our rental yield calculator to model your scenario.