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Building a granny flat in Sydney should feel exciting. But we understand it’s natural to have questions.
At Vivo Homes, clarity should come before commitment. These FAQs outline what to expect during the design, approval, and construction process. This way, you can proceed with more confidence.
Granny Flat Compliance & Suitability
What is the minimum block size for a granny flat in Sydney?
A property generally needs to have a minimum lot size of 450m² for its granny flat to qualify as complying development under the NSW Housing SEPP
However, lot size is only one part of the assessment. Your zoning, setbacks, access, site limits, and home location can all affect what’s possible.
If your block doesn’t meet the CDC requirements, it doesn’t automatically mean you can’t build a granny flat. Vivo Homes can assess whether another approval pathway may be available.
The best first step is to assess the property. This way, you know what’s possible before spending money on plans.
How do I know if my property is suitable for a granny flat?
Start with a desktop assessment.
Give Vivo Homes your property address. We’ll check key planning and site factors for your granny flat. This includes lot size, width, setbacks, zoning, and property layout.
Where available, documents such as your 10.7 Certificate, Title Search and Sewer Diagram can help us investigate further.
The aim is simple:
Check whether your property can have a granny flat before you spend money on design or construction.
Do I need to be home for a granny flat site inspection?
Usually, no.
A typical granny flat site inspection lasts about 20 minutes. We usually only need access to the front, sides, and backyard of the property.
We usually do not need to enter your existing home.
During the inspection, we’ll check access, levels, services, trees, and the existing dwelling’s position. We’ll also consider other site factors that might affect the design or construction of your granny flat.
What if my property doesn't qualify for a granny flat under CDC?
A property that doesn’t qualify for a Complying Development Certificate (CDC) may still have another pathway.
Depending on your property, zoning and local planning controls, it may be possible to pursue a Development Application (DA) through your local council.
Rather than stopping at “Your site doesn’t qualify for CDC”, Vivo Homes investigates other practical options.
Do I need council approval to build a granny flat in Sydney?
You’ll need the right development approval. But that doesn’t always mean you have to submit a traditional Development Application to the council.
Eligible granny flats can often use the quicker Complying Development Certificate (CDC) pathway. A council or an accredited certifier can assess the application.
Other properties may need a Development Application (DA).
Vivo Homes first checks your property. Then, they find the best approval pathway before moving forward with the project.
Can I subdivide and sell my granny flat separately?
Generally, no.
Under the NSW secondary-dwelling provisions the granny flat remains on the same title as the principal dwelling and cannot be separately subdivided under that approval pathway.
It can still provide significant value as additional family accommodation, rental accommodation or a better use of underperforming land.
Granny Flats Design & Approval
As a general guide, Vivo Homes allows approximately 6–8 weeks for the design and approval stage.
During this period, we coordinate the survey, preliminary design, architectural drawings, engineering, relevant authority requirements and preparation of the documentation required for approval.
The timeframe may change depending on your site, the approval process, and whether we need more information.
Our goal is to identify potential issues early so they don’t become expensive surprises later.
You don’t have to force your property or lifestyle into a design that doesn’t work.
Your granny flat needs to suit your block, how you intend to use the space and the people who will ultimately live or work in it.
If an existing design isn’t suitable, we can discuss adjustments or a more tailored solution.
The design should work around your needs — not the other way around.
Yes.
Every property has different access, orientation, setbacks, services and site constraints.
Vivo Homes can customise the granny flat design to maximise your space. They also consider planning rules and building practicality.
Whether you’re building for rental income, an ageing parent, adult children or a dedicated home office, the design should support the purpose behind the project.
Your Building Contract sets out the agreed scope of works, pricing, plans, specifications, inclusions and the contractual responsibilities of both parties.
Before signing, you should clearly understand:
Vivo Homes believes you should understand what you’re committing to before you sign — not discover important details afterwards.
Possibly, but tree removal depends on the individual tree, your property and the relevant council or planning controls.
That’s why the team considers existing trees during the site assessment and design stage.
If a tree impacts the spot for your granny flat, we’ll spot it early. Then, we can determine what approvals or design changes we need. This way, we avoid problems when construction is about to start.
Potentially, yes.
Carports, garages, and alfresco areas might be possible. This depends on the land available, setbacks, site coverage, and planning rules.
The best time to talk about these features is during the design stage. This way, they can be part of the overall property layout rather than added later.
Depending on the property and service-provider requirements, separate or sub-metered services may be possible.
Vivo Homes identifies existing service locations during the site assessment and design process. They figure out how to connect water, electricity, sewer, stormwater, data, and other needed services to the granny flat.
We’ll explain the practical options available for your individual property before construction begins.
Approval, certification, authority, and consultant fees may apply to a granny flat project.
The exact costs depend on your property, your approval pathway, and the documentation or specialist input required.
This is why it’s important to compare granny flat quotes carefully.
A low advertised construction price doesn’t necessarily reflect the true total project cost.
Vivo Homes aims to make these costs clear from the start so you know the total amount before making your decision.
Once approvals are in place and construction starts, a typical Vivo Homes granny flat takes about 16 weeks to build.
Brick veneer granny flats may take approximately 18 weeks.
The exact timeframe can vary depending on the design, site conditions, weather and project requirements.
Our focus is not simply speed. It’s maintaining a structured build process while keeping you informed about what’s happening on your property.
There are several stages between first assessment and final handover:
Assessment → Site Inspection → Quote → Design → Approval → Construction → Occupation Certificate → Handover.
Design and approvals usually take about 6 to 8 weeks. Then, construction lasts roughly 16 weeks, or about 18 weeks for brick veneer.
Your actual timeframe will depend on the site and approval pathway.
| Stage | What happens |
|---|---|
| Assessment | Desktop review of your property's granny flat potential |
| Site inspection | ~20-minute on-site visit to check access, levels and services |
| Quote | Detailed pricing based on your actual site |
| Design | Preliminary design through to architectural drawings |
| Approval | CDC or DA pathway, depending on your property |
| Construction | 16 weeks standard, 18 weeks brick veneer |
| Occupation Certificate | Final sign-off for the completed granny flat |
| Handover | Keys handed over, project complete |
At the beginning of your project, Vivo Homes can give you a clearer indication of the expected journey for your specific property.
Yes, in many cases.
However, it’s important to consider access, construction noise, temporary service interruptions, and how trades will move through the property.
Before we start, we’ll share how construction will impact the site. This way, you can inform your tenants and reduce any unwanted disruption.
Yes.
Two-bedroom granny flats are a popular choice for homeowners. They provide flexibility for tenants, family members, or adult children.
A two-bedroom design may work for your property, but it depends on your space, planning rules, and layout preferences.
Vivo Homes can assess your site and recommend a design that makes the best use of the available building area.
In some cases, authorities might permit a two-storey secondary dwelling. It really depends on the property, planning rules, and the approval process.
These projects often have complex needs about height, setbacks, privacy, and nearby properties. So, they must be assessed one by one.
Send us your property address, and we’ll investigate what’s realistically possible.
Absolutely. And we think you should.
When choosing a granny flat builder, it’s worth looking beyond renders and display images and asking to see real completed projects.
Vivo Homes has completed hundreds of granny flat projects, giving you the opportunity to see the type of work we’ve actually delivered.
It’s one more way to make your decision based on evidence rather than promises.
There isn’t one honest price that applies to every granny flat.
The final cost depends on factors such as:
| Cost factor | What it affects |
|---|---|
| Site conditions | Ground stability and drainage can change footing and preparation requirements |
| Access | Tight or restricted access can add time and equipment costs |
| Slope | Sloping blocks often need retaining work or a modified footing design |
| Design | Layout, size and complexity all move the build cost |
| Service connections | Distance to existing water, sewer, power and stormwater points varies by property |
| Engineering requirements | Site-specific structural and civil engineering can add scope |
| Approval pathway | CDC and DA pathways carry different fees and documentation requirements |
| Materials and finishes | Standard vs upgraded finishes shift the total significantly |
| Optional upgrades | Anything beyond standard inclusions is added to the base price |
That’s why unusually low advertised prices can be misleading if important site and connection costs aren’t included.
Vivo Homes starts by assessing your property. Then they provide a detailed quote based on the actual project, not just an idealised flat block.
The cost of a two-bedroom granny flat depends on several factors. These include size, design, site conditions, inclusions, service connections, and finishes you choose.
Rather than quoting a generic online figure that may have little relationship to your property, we first assess the site.
That allows us to give you a much more meaningful indication of what your two-bedroom granny flat will actually cost to build.
| Cost factor | What it affects |
|---|---|
| Location and design | The proposed granny flat's placement and layout on your site |
| Site-specific construction requirements | Anything your particular block needs beyond a standard build |
| Sewer and water connections | Linking the granny flat to existing sewer and water infrastructure |
| Stormwater | Drainage and stormwater management for the new dwelling |
| Electricity and data connections | Power and data connections to the granny flat |
| Standard inclusions | The fixtures, fittings and finishes included as standard |
| Relevant site works | Site preparation and any works the property requires |
| Upgrades | Any inclusions beyond the standard spec you choose to add |
The objective is transparency.
You should be able to read the quote and understand the project’s true cost before deciding to proceed.
This is one of the most important questions to ask any granny flat builder.
Some advertised granny flat prices can appear attractive because major site-specific costs or service connections aren’t included in the headline figure.
That can make a seemingly affordable project significantly more expensive once the site is assessed.
Vivo Homes’ approach is different.
We investigate the site, services, and project requirements so that your quote reflects the actual work required to build your granny flat, rather than relying on an artificially low starting price.
Yes.
Vivo Homes builds granny flats across the Hills District and surrounding areas.
Our experience in North-West Sydney helps us see that each suburb, council area, and block has unique planning and site factors.
If you’re in the Hills District, send us your address, and we can start by assessing your property’s granny flat potential.
Yes.
Many North Shore properties have unique features, like established trees or access issues. So, we suggest doing a property assessment first. This way, you won’t assume what can or can’t be built.
Vivo Homes can assess suitable projects across Sydney’s Northern Beaches.
Northern Beaches properties vary widely in slope, access, vegetation, and planning rules. So, the first step is to understand the site.
Please send us your address. We will check if your property is in our service area and which approval process might apply.
