Do I need a permit for a carport or garage?

A new carport or garage is one of the most common projects on a suburban block, and one of the most common permit questions. The honest answer is that it depends: on the size and height of the structure, where it sits on the block, what it is made of, whether it is attached to the house, and whether any planning overlays apply to your land. Some small structures may be exempt; many are not.

This guide explains what tends to decide the answer, what each permit involves, and what to prepare. It builds on our pillar guide on which permits apply to building work in Victoria, which explains the general picture. Nothing here is a decision about your block; your council and the relevant building surveyor confirm what applies.

When does a carport or garage need a building permit?

Building permits are issued by a building surveyor, either through your council or privately, and they deal with the building work itself: its structure, footings, tie-downs, fire separation from a boundary and so on. Most carports and garages are building work, so the starting assumption is that a building permit may be needed.

There are exemptions for some small, low, freestanding structures, and the limits depend on the current requirements. A structure that is larger, taller, attached to the house, close to a boundary or built on a sloping or reactive site is less likely to be exempt. Rather than guess at the thresholds, describe the structure to a building surveyor, who can tell you whether a permit applies and what the application needs.

If a permit is needed, the building surveyor also carries out, or arranges, the mandatory inspections at set stages of the work. Those inspections belong to the permit process. Any independent inspection you choose to commission is separate and does not replace them.

When might a planning permit also apply?

A planning permit comes from your council under its planning scheme, and it deals with how land is used and developed rather than how a structure is built. A carport or garage can bring planning into play in several situations:

• The land is covered by an overlay, such as a heritage, neighbourhood character, vegetation, flood or bushfire related overlay.
• The structure sits in front of the house, is visible from the street, or changes the look of a heritage or character area.
• The structure is close to a boundary, or affects a neighbour's light, outlook or access.
• Trees need to be removed to build it.
• The block is small, or the carport or garage is part of a larger project such as a second dwelling or a subdivision.

A project may need a planning permit, a building permit, both or neither. The council confirms the planning side and can tell you which overlays apply to your block. If a planning permit is needed, it usually has to be in place before a building permit can be issued.

What usually decides the answer?

When we help someone understand a carport or garage project, the same details come up every time. Have them ready before you speak to anyone:

• Size: the floor area and the overall footprint.
• Height: to the top of the roof, and the height of any wall on or near a boundary.
• Position: distance to each boundary and to the house, and whether it sits in front of or beside the home.
• Attachment: freestanding, or attached to the house or another building.
• Materials: steel, timber, brick, and the roof covering.
• The site: slope, soil, drainage and whether an easement runs through the area.
• Use: parking only, or a workshop, a studio or a space someone might live in.
• Overlays and zoning for the block, which your council can confirm.

That last point matters more than people expect. Two identical garages on two neighbouring blocks can have different answers because one block carries an overlay and the other does not.

What about easements, drainage and the site?

Many blocks carry an easement, often along a rear or side boundary, for drainage or sewerage. Building over or near an easement usually needs the consent of the authority that holds it, which is a separate step from the permits. Your council and the relevant water authority can tell you where easements run on your block; a title plan or survey plan shows them too.

Stormwater from a new roof has to go somewhere. How it is connected, and whether it affects a neighbour, is part of what the building surveyor and the council look at. On a sloping block, cut and fill, retaining walls and the footings for a garage can add their own requirements. A site and land inspection looks at the site features and surrounds before you commit to a design, which can save a redesign later.

What does the permit process involve?

For a building permit, the application usually includes drawings of the structure, a site plan showing where it sits, details of materials and footings, and sometimes engineering for the slab or the frame. The building surveyor assesses the application, issues the permit if it meets the requirements, and sets the mandatory inspection stages. Work should not start until the permit is in place.

For a planning permit, the council's application process asks for plans, a description of the proposal and, depending on the overlay, extra material such as a heritage or vegetation assessment. Neighbours may be notified and can object. The council decides, and timeframes depend on its process.

Our permits and approvals service helps you work out which permits may apply, identify what the relevant authority commonly asks for, organise the material and check it for gaps before you lodge it. We cannot promise an approval or a timeframe, and the decision always sits with the authority. If the work includes a deck or a pergola beside the garage, our guide on whether a deck needs a permit covers the same questions for that part of the project.

What if the carport or garage is already built?

If you have bought a home with a garage or carport and cannot find a permit for it, start with the records. Permits and certificates can usually be requested from your council or the building surveyor involved, and our property paperwork service can help you work out what exists and what is missing.

Where no permit was obtained and one was needed, it may be possible to apply after the fact. The relevant building surveyor decides what is needed, which can include an inspection of the structure and changes to the work. If you are selling, your conveyancer or lawyer can advise on what to disclose in the vendor's statement.

Before demolishing an older garage to make way for a new one, remember that materials in structures built before about 1990 may contain asbestos. An asbestos check identifies materials that may contain it and arranges sampling where needed, so the demolition can be planned around them.

How do we help?

Tell us about the carport or garage you are planning: its rough size and height, where it sits on the block, what it is made of and whether it is attached to the house. Share any sketches, plans or council correspondence you have, and let us know about deadlines. We will explain which permits may apply, what the authority is likely to ask for, and how to put the material together. Your council and the building surveyor make the decisions.

Not sure whether your project needs a permit? Call 0406 194 163 or send an enquiry and we will come back to you.

Sources and authorities

These public sources set out the requirements this guide refers to. They are the places to confirm what applies to your property; we help you understand and prepare for them.

• Building and Plumbing Commission: when building work needs a building permit, a planning permit or both, and how the mandatory inspections are set on the permit.
• Planning Victoria: what a planning permit is and how an application is decided.