Granny flats have never been more popular in Melbourne. Whether they're built to house an ageing parent, provide a teenager with private space, generate rental income, or add long-term value to a property, the appeal is clear. What's changed dramatically in recent years is the regulatory pathway, and many homeowners are still working off outdated information about what's required. The December 2023 Amendment VC253 reforms transformed the rules, and getting current advice from a qualified town planning team in Melbourne is now more important than ever for anyone planning a project. At SilverPoint Building Designers & Planning Consultants, we help homeowners navigate exactly this kind of regulatory change every day.
If you're researching a granny flat permit in Melbourne, the most important thing to know is that the answer depends on the size of the dwelling, the size of your lot, and whether your property has any planning overlays.
In this blog, we'll cover the six things every Melbourne homeowner should know about granny flat permits in 2026, when you do still need a planning permit, what the building permit process involves, how long the whole approval takes, council-specific considerations, common mistakes to avoid, and how to make the process as straightforward as possible.
What You Need to Know About Granny Flat Permits in Melbourne
The regulatory landscape for granny flats in Victoria changed substantially with Amendment VC253 in December 2023, and the new rules are now well-established across all 31 Melbourne councils. These are the six factors that determine what permits your project actually needs.
1. The 2023 Reforms Removed Planning Permits for Many Granny Flats
Before December 2023, building any granny flat in Victoria required both a planning permit and a building permit. Amendment VC253 changed this by introducing the Small Second Dwelling (SSD) category, which allows smaller granny flats to be built without a planning permit if they meet specific criteria. This is the single biggest change in granny flat regulation in decades, and it saves most projects between $5,000 and $15,000 in planning fees and several months of approval time.
2. The 60 Square Metre Threshold Is the Key Test
The Small Second Dwelling exemption applies only to granny flats with a floor area of 60 square metres or less. If your design exceeds this threshold, you fall back into the standard planning permit pathway. Sixty square metres is enough for a comfortable one-bedroom self-contained dwelling with a kitchen, living area, bedroom, and bathroom, but it's tight for two bedrooms or generous living spaces. Carefully scoping the floor plan around the 60 sqm cap is one of the most consequential design decisions in the early stages.
3. Your Lot Must Be 300 Square Metres or Larger
The SSD exemption also requires your existing property to be 300 square metres or larger. This protects against overdevelopment of small inner-city blocks and ensures the existing dwelling, the granny flat, and the outdoor space all have reasonable proportions. Lots smaller than 300 sqm can still potentially support a granny flat, but the project will need a planning permit and the application will be assessed against the standard ResCode framework.
4. Environmental Overlays Can Still Trigger a Planning Permit
Even on a large lot with a compliant 60 sqm design, your property may still need a planning permit if it has certain overlays attached to it. The most common triggers are bushfire management overlays, heritage overlays, vegetation protection overlays, flooding overlays, and significant landscape overlays. Before assuming your project qualifies for the SSD exemption, the planning property report for your specific address needs to be reviewed for any overlays that would change the pathway.
5. You Always Need a Building Permit
Regardless of whether a planning permit is required, every granny flat in Melbourne larger than 10 square metres needs a building permit. The building permit is what ensures the structure complies with the National Construction Code (NCC), the Building Code of Australia, and relevant Australian Standards. It's also where the National Construction Code 2022 Livable Housing Design Standard requirements apply, including step-free entry, wider doorways, accessible toilet, and reinforced bathroom walls for grabrails if needed.
6. Each Melbourne Council Has Its Own Interpretation
The 31 local councils across metropolitan Melbourne interpret the building permit requirements, siting rules, and setback standards slightly differently. Some councils require pre-application meetings, some have additional design guidelines, and some have specific stormwater or driveway access requirements. Working with a team that already has experience across multiple Melbourne councils typically shortens the approval time and reduces the back-and-forth on technical details.
When Do You Still Need a Planning Permit for a Granny Flat in Melbourne?
A planning permit is still required if your granny flat design exceeds 60 square metres in floor area, if your property is smaller than 300 square metres, if your property has a heritage, bushfire, vegetation, flooding, or significant landscape overlay that triggers planning approval, or if you're proposing to subdivide and sell the granny flat as a separate title (which is not permitted under the SSD framework but is possible through other planning pathways).
Planning permits for granny flats in these situations are assessed against ResCode (Clause 55 of the Victoria Planning Provisions), similar to townhouse developments, with consideration of setbacks, overshadowing, overlooking, parking, and amenity for the existing and new dwellings. The application typically takes 3 to 6 months, longer if public notification is required or objections are received. For a detailed walk-through of the planning permit process generally, our blog on how to get a planning permit approved covers the steps in depth.
What Does the Building Permit Process Involve and How Long Does It Take?
The building permit process for a granny flat in Melbourne involves preparing detailed construction documentation, submitting it through a registered building surveyor, and obtaining the permit before any work begins. Documentation typically includes architectural drawings, structural engineering details, energy efficiency assessment, soil reports, and stormwater plans.
In 2026, the average building permit processing time for a granny flat in Melbourne is 3 to 6 weeks, which is significantly faster than the 8 to 12 weeks that were typical a few years ago. The improvement comes from streamlined council processes, more registered private building surveyors, and the removal of planning permit requirements for many projects, which means the building permit is the only approval step, rather than the second stage of a longer pathway.
Building permit fees typically range from $2,500 to $4,000 in Melbourne, depending on the size of the project, the surveyor, and the council. The full timeline from initial consultation to a finished, ready-to-occupy granny flat is typically 20 to 32 weeks, including design, documentation, permit, construction, and handover.
Council-Specific Considerations Across Melbourne
While the state-level rules apply uniformly across Victoria, individual Melbourne councils have their own interpretation of building permit requirements and supporting policies. Inner-city councils such as Boroondara, Stonnington, and Yarra often have more conservative views on bulk and visual impact, even when no planning permit is required, and may require additional design refinement before issuing a building permit.
Outer suburban councils such as Casey, Knox, Melton, and Greater Dandenong tend to have more streamlined processes for compliant SSD designs but may have specific requirements around stormwater, vehicle access, and landscaping that catch homeowners out. Hills councils such as Yarra Ranges and Manningham have additional bushfire management considerations that affect both design and material selection.
Our team works regularly across all these councils and maintains the local knowledge needed to navigate the differences efficiently. If you're considering a granny flat on a specific property, the planning property report and a brief check of your council's current policies are the right starting points.
Common Granny Flat Permit Mistakes to Avoid
The most common granny flat permit mistakes we see in Melbourne fall into four categories.
Assuming you still need a planning permit when you don't is the first. Many homeowners still spend money on planning applications that aren't required because they're working off pre-2023 information. A quick feasibility check would have confirmed the SSD pathway and saved $5,000 to $15,000.
Assuming you don't need a building permit because no planning permit is required is the second. The two are completely separate, and building permits are always required. Building without one creates serious legal and insurance issues that can affect both the granny flat and the main dwelling on the title.
Designing over the 60 sqm threshold by a few square metres is the third. Going from 60 sqm to 65 sqm switches the project from the no-planning-permit pathway to the full planning permit pathway, adding months of approval time and thousands of dollars in fees for very little extra living space. A precise design that maximises usable area within the 60 sqm cap is almost always the right call.
Ignoring overlays is the fourth. The planning property report tells you definitively whether overlays apply. Skipping this check and assuming the SSD pathway applies can result in a stop-work notice once the council discovers the overlay during the building permit review. Always check overlays first.
Why Choose SilverPoint Building Designers & Planning Consultants for Your Granny Flat Permit
SilverPoint Building Designers & Planning Consultants has been guiding Melbourne homeowners through planning and design projects for over 40 years, with more than 1,800 completed projects across residential and commercial categories. We've supported clients through the December 2023 reforms and now regularly handle granny flat designs under both the SSD pathway and the standard planning permit pathway, depending on what each property requires.
Our integrated approach brings town planning, building design, and project management together under one roof, which is particularly valuable for granny flat projects where the design needs to thread the needle between maximum usable space and the 60 sqm SSD cap. Our team is accredited with HIA, Master Builders Victoria, and the Building Practitioners Board, and our 4.9 Google rating reflects how clients describe working with us. If you're at the early stage of planning a granny flat, our town planning Melbourne team can quickly confirm which permit pathway applies to your specific property.
Key Takeaways
Granny flat permits in Melbourne in 2026 are significantly easier than they were before December 2023, when Amendment VC253 introduced the Small Second Dwelling (SSD) category.
If your granny flat is 60 square metres or smaller, your lot is 300 square metres or larger, and your property has no triggering overlays (bushfire, heritage, vegetation, flooding, significant landscape), you don't need a planning permit. You always need a building permit, regardless of whether a planning permit is required, and building permit fees typically range from $2,500 to $4,000 in Melbourne. The full timeline from initial consultation to a finished granny flat is typically 20 to 32 weeks.
The most common mistakes are assuming the old rules still apply, skipping the building permit, designing over the 60 sqm threshold by accident, and ignoring overlays. Engaging a qualified planning and design team from the start typically saves time, money, and stress, and ensures the right permit pathway is chosen for your specific property.
Ready to plan your granny flat?
Granny flat projects work best when the design, the permit pathway, and the construction are coordinated from the start. Whether you're at the early concept stage or already have a builder in mind and need help with the permits, our team can confirm exactly what your property needs and how to get there efficiently. Call SilverPoint Building Designers & Planning Consultants on (03) 9888 9688 or book a complimentary 30-minute consultation to talk through your project.
