The two permits answer different questions.
A planning permit asks whether the proposed use or development is acceptable under the Victorian planning scheme. A building permit checks whether the construction documents comply with building regulations.
For a Victorian small second dwelling, a building permit is always required. A planning permit may not be required in many cases, but that depends on the lot size, zone, overlays and proposal. The broader criteria are explained in our Granny Flat Rules Victoria guide.
What does a planning permit cover?
Planning looks at the property and its surroundings. Depending on the site, the assessment may consider the zone, overlays, setbacks, building height, private open space, overlooking, overshadowing, vegetation, flooding, bushfire risk or neighbourhood character.
Victoria's small second dwelling framework generally applies to a self-contained dwelling of 60 m² or less on the same lot as an existing home. In many residential and rural zones, a qualifying proposal may not need a planning permit.
A lot under 300 m² in a relevant residential zone may require a planning permit and Clause 54 assessment. Some zones and overlays also retain permit requirements or other controls.
The property must be checked against the current planning scheme. A nearby approved granny flat does not confirm the result for your address. Start with the checks in Can I Build a Granny Flat?
What does a building permit cover?
The building permit deals with the technical construction.
The registered building surveyor reviews the proposed work against the applicable building regulations and National Construction Code requirements. The documentation may include architectural drawings, engineering, energy information, siting details and other reports relevant to the project.
The building permit sets the approved construction scope and required inspections. At completion, the project may need an occupancy permit or certificate of final inspection, as specified by the building surveyor. Our How We Build page shows where approvals fit into the wider project sequence.
A building permit is not a replacement for a planning permit.
When might both permits be required?
Both may apply when the planning scheme requires approval for the use or development and the building work also needs its mandatory building permit.
Reasons for a closer planning check include a lot under 300 m² in a relevant residential zone, a zone or overlay with a permit trigger, a proposal that does not meet a siting standard, or special controls relating to earthworks, vegetation, flooding or another site issue.
An overlay name alone is not enough. Some controls include exemptions or conditions for small second dwellings, while others retain a permit requirement.
What if the proposed dwelling is over 60 m²?
A dwelling over 60 m² does not fit Victoria's small second dwelling definition.
It may be assessed as another type of residential development, with different planning, design, parking, open-space and servicing requirements. Confirm the correct pathway before progressing the design.
Which permit comes first?
Where no planning permit is required, the project can move toward building-permit documentation once the site and design requirements are understood.
Where planning approval is required, it is often sensible to resolve the planning position before finalising every technical document. Some work can be coordinated in parallel, but doing too much too early creates a risk of redrawing engineering or energy documentation.
Why fixed permit costs and timelines are unreliable
Application fees, reports and assessment time vary with the project value, council, referral authorities, overlays and quality of the documentation.
Use estimates only after the property and likely approval path have been reviewed. Treat them as project-dependent allowances rather than promises.
What M Plus checks before talking design
M Plus starts with the property address, existing dwelling, proposed floor area, intended use, lot size, zone, overlays, easements, access, services and likely siting standards. We then identify whether a planning permit appears likely and what building-permit documents may be needed later.
This does not replace advice from council, a planner or a registered building surveyor. It gives the project a more sensible starting point. Send the property address through the Free Land Check before detailed documentation begins.
