Small Second Dwelling Permit Victoria: Correction to Our Data Report

Small second dwelling permit Victoria guidance distinguishes planning permission from building approval: a building permit is still required. Our earlier report did not establish a rise in permit numbers or a ranking of municipalities.

Correction, 2 October 2026: we removed unsupported claims about quarterly growth and Casey, Wyndham and Greater Geelong leading approvals. We also removed an unsourced service-connection cost range. No dated dataset was supplied for those claims.

By The Granny Flat Guide Team. Originally published 13 September 2026; corrected 2 October 2026. About our team.

What the published rules establish

Victoria’s small second homes guidance describes a self-contained dwelling of no more than 60 square metres on the same lot as an existing home. It says most qualifying proposals can proceed without a planning permit where special planning controls do not apply, but a building permit is always required.

The same guidance identifies a planning-permit requirement on residential lots smaller than 300 square metres, with its stated zoning qualifications. Lot size alone is not a complete site assessment. Ask the council about your zone and overlays, then have the proposed design assessed through the relevant building approval process.

Why permit rules do not prove permit growth

A rule allowing a type of development does not show how many people applied, obtained approval or completed construction. Those are different measures. A credible trend report needs the actual dataset, reporting period, dwelling definition and comparison period. A general regulator homepage cannot establish which council approved the most projects.

For your own decision, separate evidence about demand from evidence about buildability. Even a properly sourced statewide increase would not prove that a second dwelling fits your block or budget. Request a site-specific assessment before treating an advertised layout as suitable. Keep the assumptions with any preliminary quote so later changes can be traced.

Check the proposal before committing to a package

Put the property address, proposed floor area and intended use into your enquiry. Ask which approvals are included in the service offered, who prepares the application and which site investigations remain outstanding. If a quote says approvals are excluded, ask for those responsibilities and costs to be identified separately.

Ask the designer or builder to show access, service connections and known constraints on a site plan. Request written clarification where the sales description and drawings differ. A line marked provisional is a reason to investigate the assumption, not evidence of a fixed final price.

Use our Victorian rules guide as a starting checklist. The cost calculator is an estimate, not a builder’s offer or an approval assessment. Further policy reporting is available in Granny Flat Guide News.