Know what the land actually allows — before Saturday
You often have days, not weeks, between shortlisting a property and advising a client to bid. A planning position you can stand behind, from the address, in that window.
“Potential to subdivide (STCA)” is often simply wrong
The arithmetic people use is lot area divided by the minimum. That is not the test. Every resulting lot counts — including the balance lot your client keeps. Creating one additional lot means two lots, so it needs at least twice the minimum. The land you retain is not exempt.
On a 4,000 m² minimum, a 6,081 m² block cannot be subdivided at all — two lots would need 8,000 m². It is comfortably over the minimum and still yields nothing.
The minimum itself comes from the schedule to the zone, and the schedule overrides the standard default. It is lot-specific and council-specific, so a figure carried from another job is a guess. Where a schedule specifies a single minimum for all land, connection to reticulated sewerage does not reduce it — a common and expensive assumption.
What actually decides the answer
Five things, and only the first two are in the planning scheme.
Zone and the schedule to it
The zone code is the headline; the schedule is the substance. Two properties in the same zone in different councils can face quite different height, setback and lot-size controls.
Every overlay on the land
Heritage, bushfire, flooding, significant landscape, vegetation, design and development. An overlay can require a permit for work the zone would exempt, and is the usual reason a straightforward plan becomes an application.
Restrictions on title
A single-dwelling covenant or a Section 173 agreement prohibits outright what the planning scheme permits. Planning approval does not override it, and removing one is difficult and uncertain.
Registered easements
A drainage or sewer easement across the rear can remove the part of the block your client was planning to build on. It sits on the plan, not the planning scheme.
Minimum garden area
A mandatory zone control on lots over 400 m² — 25% at 400–500 m², 30% at 501–650 m², 35% above 650 m². There is no discretion to reduce it, so it caps what an extension or second dwelling can occupy.
You don’t need to own it to ask
Worth knowing when a client wants certainty before committing. In Victoria any person may apply for a planning permit over land they do not own — where the applicant is not the owner, the requirement is to notify the owner, not to obtain their consent (Planning and Environment Act 1987, s 47).
Keep the two questions separate. The permit application needs no owner consent; actually building or entering does need the owner’s agreement or an appropriate instrument on title. This is a Victorian position — do not carry it into other states.
Built for repeat use
The free snapshot returns the zone and overlays from an address in about thirty seconds, which is enough to triage a shortlist. The $39 Planning Insight reads the actual schedules for the lot and answers a specific question — extend, subdivide, second dwelling, change of use — in plain English you can forward to a client.
Where a purchase turns on what the title says, order the certificate of title and plan alongside it. A covenant is the one finding that makes the planning answer irrelevant, and it is not visible from the address.
General information about the Victorian planning system, not advice on a particular acquisition. What applies to a lot depends on its zone and the schedule to it, the overlay schedules affecting it, and any restriction registered on title.