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In Victoria, you need a building permit for any home extension or renovation that alters load-bearing walls, expands the building footprint, or impacts structural safety. A separate planning permit from your local council may also be required, depending on zoning, heritage overlays, setbacks, and building height restrictions.
With more than 50 years’ experience delivering home extensions across Melbourne, Supa Group has worked across a wide range of property, council and planning requirements.
Key takeaways
- Major extensions and structural renovations commonly require a building permit.
- A planning permit and a building permit are separate approvals, and some projects need both.
- Requirements can vary according to the property, planning scheme and proposed work.
- Permit exemptions are specific and should be confirmed before construction begins.
- Supa Group can manage council approvals and project documentation as part of its concept-to-completion service.
What is a building permit?
A building permit is your formal approval to start construction. It confirms that the plans for your project in Victoria comply with the Building Act 1993, the National Construction Code and relevant safety requirements.
Building permits are issued by a registered private or council building surveyor. The surveyor reviews the plans and supporting documents before approving the application. Once issued, the permit allows building work to take place in accordance with the approved plans and conditions.
Most extensions and structural renovations require a building permit, including:
- Adding a house extension, deck, carport or other new structure
- Removing, adding or altering structural walls
- Installing a swimming pool, spa or large shed
- Making significant changes to the roof or building framework
Your application may need to include:
- Architectural plans and drawings
- Structural engineering reports
- Energy-efficiency assessments, such as a NatHERS certificate
- Details of the registered builder and their licence or registration
A building permit is different from a planning permit. Planning permits consider how land may be used or developed, while building permits focus on how the work will be constructed safely. Some projects require both planning and building permits, so it is important to check the requirements before work begins.
Although the approval process can take time, it helps ensure your extension or renovation is compliant, durable and safe to occupy.
What is town planning approval?
Town planning approval is all about ensuring your project fits within the broader rules of your neighbourhood. Councils use this process to protect the character and zoning of local areas, ensuring that developments don't clash with the surrounding environment.
You'll typically need town planning approval if your project involves:
- Extending your home on a small or sensitive block.
- Building close to property boundaries or in heritage overlay areas.
- Making significant changes to the appearance of your property, like adding a second storey or a new façade.
- Developing a unit or townhouse on residential land.
The exact rules vary between councils, but the goal is always the same: to ensure projects align with the vision for the local area.
What is the difference between a planning permit and a building permit?
A planning permit and a building permit assess different parts of your project. Depending on the proposed extension or renovation, you may need one, both or neither. When both are required, the planning permit generally needs to be obtained first.
A simple way to remember the difference is that planning approval considers what you can develop on the land, while a building permit considers how the work will be constructed safely and compliantly.
Understand setbacks and building limits before you extend
See how setbacks, height restrictions, heritage overlays and other planning requirements can influence your home extension, and why considering them early can lead to a smoother approval process.
When do you need a building permit?
Most home extensions and structural renovations in Victoria require a building permit before construction starts. The requirement is generally determined by the scope and nature of the building work, not simply its cost.
You are likely to need a building permit when your project:
- Increases the floor area or footprint of your home
- Adds a new level, room or attached structure
- Changes or removes a load-bearing wall
- Alters the roof, footings or structural framework
- Affects the home’s safety, structural soundness or amenity
- Includes regulated outdoor structures such as a deck, verandah or garage
A registered building surveyor should confirm the requirements for your specific project. Building work cannot legally begin until the necessary permit has been issued.
Extensions and structural renovations
A building permit is normally required when extending a house or carrying out renovations that affect its structure. Common examples include:
- Ground-floor and second-storey extensions
- New bedrooms, bathrooms or living areas that enlarge the home
- Removing or modifying load-bearing walls
- Creating larger door or window openings
- Changing the roofline or roof structure
- Restumping, reblocking or underpinning
- Converting an existing area into a habitable room
- Major internal remodelling that affects structural elements
Even when the work is mostly internal, a permit may still be required if it affects the house's structural soundness or safety. Structural building work must also be completed by an appropriately registered practitioner.
Decks, verandahs, garages and retaining walls
Building permits are not limited to work inside the home. You may also need approval for structures such as:
The exact rules and exemptions depend on the design, dimensions, location and site conditions. A planning permit may also be required where zoning, heritage controls or other overlays apply.
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Tip: Check before finalising your design
Permit requirements can affect setbacks, height, materials and the overall design of an addition. Confirming them early can reduce the risk of redesigns, delays or unexpected costs later in the project.
When do you not need a building permit?
Some minor home improvements may be exempt from a building permit in Victoria, particularly when the work is non-structural and does not affect the building's safety or use. However, an exemption is not based on cost alone. The size, location and nature of the work all matter.
Projects that may not require a building permit include:
- Replacing kitchen or bathroom fittings without changing the structure
- Painting, plastering, tiling or installing floor coverings
- Replacing existing windows or doors with similar products where the opening is not made bigger
- Minor repairs using similar building materials
- Installing cabinetry or completing a cosmetic internal remodel
- Carrying out limited maintenance that does not alter structural elements
- Replacing roof coverings without changing the roof structure, subject to the applicable exemption requirements
A kitchen or bathroom renovation can still require approval if you remove a load-bearing wall, enlarge a window opening, alter the structure or add new rooms. Likewise, work involving a garage, verandah, alfresco addition, reblocking or restumping is more likely to require a building permit. Structural work requires a permit regardless of the project cost.
A permit exemption in Victoria does not remove every approval
Even when you do not need to get a building permit, you may still need:
- A planning permit or council consent
- Approval from an owners corporation
- A licensed electrician or registered plumber
- Certificates for electrical, plumbing or gas work
- Compliance with Victorian building regulations and other relevant laws
Before you renovate, ask your local council whether you need a planning permit. You can also appoint a registered municipal or private building surveyor to confirm whether an exemption applies. The surveyor may charge a fee for advice or for assessing a building permit application, but only a registered building surveyor can issue a building permit.
Steps to apply for a building permit in Melbourne
Getting a building permit involves more than submitting a basic form. Your plans must be developed, any required planning approval secured, and a registered building surveyor appointed before the application can be assessed.
- 01
Prepare your documentation
Start by preparing the drawings and supporting information needed for your building permit application. The exact documents will depend on the size and complexity of the extension or renovation, but may include:
- Architectural drawings, floor plans and elevations
- A current copy of the property title
- Site and allotment plans
- Engineering computations and structural drawings
- Specifications covering construction methods and building materials
- Soil reports and footing details
- Energy-efficiency assessments
- Details of the registered builder
- Copies of any planning permit, endorsed plans or council consents
The plans should clearly show the proposed addition and any changes to the existing home, including the roof, windows, walls and room layouts. Incomplete or inconsistent documentation can extend the permit process because the building surveyor may request further information or design changes.
- 02
Check council requirements
Before applying for a building permit, check with your local council to determine whether you also need a planning permit. Planning requirements can be affected by the property’s zoning, overlays, heritage status and the scale of the proposed development.
Where a planning permit is required, it must generally be obtained first. Your building permit plans must then remain consistent with the endorsed planning plans and conditions. Other council approvals may also apply, including demolition consent, stormwater or drainage approval, asset protection permits and permission to build near council infrastructure.
You will also need to appoint either a municipal building surveyor or a registered private building surveyor. Your builder may recommend a surveyor, but they cannot appoint a private building surveyor for you.
- 03
Submit and finalise your application
Once the documentation and any planning approval are ready, the permit application is submitted to the appointed building surveyor. Supa Group or another authorised agent can apply on your behalf, provided you have given written authority and appointed the private building surveyor yourself.
The surveyor will assess the application against the Building Act 1993, the Building Regulations 2018, and the National Construction Code. They may:
- Request additional documents
- Require amendments to the plans or specifications
- Identify protection work for adjoining properties
- Calculate applicable fees and the building permit levy
- Approve the application and issue the building permit
Construction can begin only after the building permit has been issued. The permit will identify the approved work, the builder's details, conditions, and mandatory inspection stages. Once the project is complete and compliant, the surveyor will issue either an occupancy permit or a certificate of final inspection, depending on the type of work.
How much does a building permit cost?
There is no fixed building permit fee in Victoria. Costs vary depending on the size, value and complexity of the project, as well as the building surveyor’s fees and supporting documentation required.
Permit-related costs may include:
- building surveyor assessment and inspection fees
- the building permit levy
- council lodgement or planning permit fees
- engineering, soil and energy reports
- amendments or additional inspections
A single-storey addition may cost less to assess than a second-storey extension or complex structural renovation. Before appointing a private building surveyor, ask for a written quote showing what is included, including mandatory inspections and the final occupancy permit or certificate of final inspection.
What happens if you build without a permit?
Starting work without a required building permit can lead to costly and time-consuming problems. Both the builder and homeowner may face fines, and the relevant building surveyor or council may require the work to stop, be inspected, corrected or removed.
Unapproved building work can also:
- Delay the issue of an occupancy permit or certificate of final inspection
- Require plans, engineering reports and inspections after construction
- Restrict your ability to sell or refinance the property
- Create insurance or warranty complications
- Result in expensive rectification or demolition
- Expose a registered builder to disciplinary action or licence restrictions
The fact that work appears safe does not make it compliant. A single missing permit can create long-term issues because mandatory inspections may not have been conducted at the relevant stages of the building.
Can you get retrospective approval?
In some cases, a building surveyor may assess existing work and outline what is needed to achieve compliance. However, this is not the same as obtaining a permit before construction, and approval is not guaranteed. Parts of the structure may need to be opened, tested, altered or rebuilt.
Who is responsible for obtaining the permit?
As the homeowner, you are ultimately responsible for making sure all required planning and building permits are obtained before work begins. Your builder, architect or designer may manage the application for you, but this arrangement should be clearly documented in your building contract or written authority.
You must personally appoint either a municipal building surveyor or a registered private building surveyor. Your builder may recommend one, but cannot appoint a private building surveyor on your behalf. The appointed surveyor then becomes the relevant building surveyor for the project and is responsible for assessing the application, issuing the permit and completing required inspection
Supa Group is here to help with your building permit
Building permits can involve multiple professionals, documents and approval stages. Supa Group brings these moving parts together, helping you navigate the process with clear guidance and coordinated support from the early planning stages through to final certification.
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One team coordinating the process
Instead of managing different consultants and approval requirements yourself, you can rely on Supa Group to coordinate the key stages of your building permit alongside your extension project.
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Permit-ready plans and documentation
Our team coordinates the architectural plans and supporting documentation needed for your application, helping ensure the relevant information is prepared before it reaches the approval stage.
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Engineering and energy assessments
Where engineering or energy-efficiency assessments are required, we coordinate them as part of the wider project to help keep your documentation moving forward.
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Council liaison and approvals
We can liaise with the council and help manage applicable planning and approval requirements, reducing the amount of back-and-forth you need to handle yourself.
Building surveyor coordination
Supa Group communicates with the appointed building surveyor and helps address documentation requests or permit conditions that arise during the assessment process.
Support through to final certification
Our involvement does not stop once the permit is issued. We help coordinate relevant permit conditions, inspections and final certification as your extension progresses.
Permit approval times can vary depending on your property, project scope, council requirements and whether additional information or design changes are requested. Rather than promising a fixed timeframe, our team helps you understand what is required at each stage and keeps the process moving wherever possible.
Book your free consultation
With more than 50 years of experience delivering home extensions across Melbourne, we understand how early planning can reduce delays and avoid lengthy approval processes.
