One of the most common questions we get from homeowners across Melbourne is: “How long will it take to build my granny flat?” And it’s a fair question. Whether you’re planning to house elderly parents, earn rental income, or expand your living space, timing matters.
While every site and design varies slightly, the general granny flat build process with Innovista Group takes between 16 to 20 weeks, once approvals are in place. But to truly understand the journey, it helps to break down the entire timeline, from your first enquiry to final handover.
Week 1-2: Initial Consultation & Feasibility Assessment
The process starts with a no-obligation consultation where Innovista assesses your land’s potential. During this stage, we:
- Review your site’s zoning and overlays
- Discuss your goals and space requirements
- Recommend suitable models like the Lana 43 or Lana 60
- Provide a ballpark estimate and realistic timelines
This early discovery stage ensures your project is viable before you invest in detailed design and documentation.
Weeks 3-4: Design & Inclusions Finalisation
Once feasibility is confirmed, we begin crafting your granny flat layout. You’ll choose between our Signature and Luxe finishes, select colour schemes, and customise features.
During this stage, Innovista:
- Finalises floor plans with client input
- Prepares 2D drawings and specification lists
- Offers accessibility or rental optimisation modifications if needed
This phase is collaborative and focuses on getting the functionality and finishes right before formal submissions begin.
Weeks 5-8: Permits & Engineering
Once you approve the final design, we begin the documentation phase. Depending on your local council and overlays, this may include town planning or building permit-only pathways.
We handle:
- Soil testing and energy reports
- Structural and drainage engineering
- Preparation of building permit documentation
For planning-permit-required builds, allow an additional 4-12 weeks depending on council responsiveness. In many cases across Melbourne, especially in compliant residential zones, no planning permit is required.
Weeks 9-10: Final Costing & Contracts
After all reports and drawings are complete, we provide a fully itemised final quote and build contract. There are no hidden costs, every inclusion is detailed.
Once the contract is signed and your deposit is paid, we move into the site preparation phase.
Week 11-12: Site Prep & Construction Begins
Site works commence with:
- Clearing and levelling
- Stump or slab foundation installation
- Material orders and construction team mobilisation
At this point, your site becomes active, and construction begins. You’ll receive regular updates and photo progress via your project coordinator, or if you live in the primary dwelling, just peek into the backyard for some updates!
Week 13-26: Frame to Fit-Out
This is where your granny flat takes shape. Week by week, the following happens:
- Frame and roof installation
- External cladding, windows, doors & insulation
- Interior linings, waterproofing, tiling, and cabinetry
- Electrical, plumbing, heating/cooling, and final fit-off
- Additional building inspections are completed throughout for peace of mind
The final weeks focus on quality control, compliance, and any finishing touches like deck installation or landscaping advice.
Week 27-28: Handover & Occupancy
Once construction is complete, we:
- Conduct a final inspection
- Provide a full compliance and handover pack
- Review warranties, manuals, and certificates
- Offer a 6-month maintenance window for peace of mind
Check out our recent articles
1-Bedroom Granny Flats: Perfect for Parents or Adult Teens
House & Granny Flat Packages: A First-Time Home Buyer’s Dream Setup
Whether you’re planning to move in with a parent, list the flat on Airbnb, or lease it long term, you now have a fully compliant, energy-efficient, architecturally curated second home, delivered on time and on budget.
Why Innovista’s Timeline Works
Our systemised approach ensures that timelines remain predictable. By managing planning, design, compliance, and construction under one roof, we eliminate delays caused by miscommunication or external third parties.
We also offer:
- Real-time project tracking
- Access to the same team throughout the build
- Clear communication and accountability at every stage
Final Thoughts: A Structured Path To A Seamless Build
Building a granny flat in Victoria doesn’t have to be stressful. With a defined process, experienced team, and clear timeline, Innovista Group ensures that your project moves forward smoothly, from concept to keys.
Interested in building a backyard home for your parents or teens? Contact us to explore the best-fit designs for your block.
