As the demand for flexible living solutions continues to grow in Perth, granny flats have become a go-to option for homeowners looking to maximise their space, generate extra income, or accommodate multigenerational living. But while there are plenty of ready-made designs on the market, more Perth property owners are turning to custom granny flats—and for good reason.
In this post, we’ll explore why custom granny flats in Perth are worth the investment, the benefits of tailored designs, and how to find the right granny flat builder to bring your vision to life.
What is a Custom Granny Flat?
A custom granny flat is a secondary dwelling designed and built specifically to meet your needs, lifestyle, and property layout. Unlike pre-designed or cookie-cutter options, a custom build allows you to personalise everything from the floor plan and layout to the materials and finishes.
Whether you’re after a one-bedroom retreat, a fully self-contained two-bedroom flat, or a luxury studio with a home office—customisation gives you complete control.
Why Choose a Custom Granny Flat Over a Standard Design?
While pre-designed granny flats may seem quicker and cheaper up front, they often come with compromises. Here’s why custom is better for many Perth homeowners:
1. Tailored to Your Block
Every block is unique—whether it’s sloped, oddly shaped, narrow, or has existing structures like sheds or pools. Custom granny flats are designed to make the most of your available space, while ensuring optimal orientation, privacy, and access.
- Maximise natural light and ventilation
- Fit around trees, fences, and landscaping
- Respect existing home layout and distance
- Ensure privacy for both the main home and the granny flat
2. Designed for Your Lifestyle Needs
A custom design ensures the space truly works for its purpose. Whether you’re housing elderly parents, young adults, or short-term tenants, you can include features that make life easier and more comfortable.
Common custom features include:
- Wider doorways and step-free access for seniors
- Integrated home offices or study nooks
- Extra storage or built-in wardrobes
- Outdoor decks or alfresco areas
- Open-plan kitchens with premium appliances
3. Higher Quality, Better Materials
Many off-the-plan granny flats come with limited inclusions and budget materials. With a custom design, you’re in control of the quality—and can choose:
- Durable flooring and finishes that last
- Premium tapware and cabinetry
- Eco-friendly insulation, lighting, and ventilation
- Better soundproofing for comfort and privacy
This means a more comfortable space that lasts longer, performs better, and adds more long-term value to your property.
4. More Attractive for Tenants or Guests
If you plan to rent out your granny flat (long-term or short-stay), customisation gives you a competitive edge. A unique, high-quality space will:
- Attract higher rental returns
- Appeal to quality tenants or Airbnb guests
- Offer features tenants actually want (like air-con, outdoor living, or a full kitchen)
You can even style it with your branding in mind if you plan to market it as a short-term stay or boutique rental.
5. Boosts Your Property Value
A well-designed custom granny flat doesn’t just provide extra living space—it adds genuine equity to your property. It enhances the overall appeal, livability, and resale potential.
Buyers love the flexibility a granny flat offers, and a high-end, custom-designed one will stand out in the Perth market far more than a basic prefab unit.
What’s Involved in Building a Custom Granny Flat in Perth?
Working with a granny flat builder in Perth who specialises in custom designs is key. Here’s a quick breakdown of the process:
Step 1: Site Assessment & Consultation
- Evaluate your block
- Understand your goals, budget, and vision
- Check council requirements and R-Codes
Step 2: Design & Planning
- Work with a designer or architect
- Choose floor plan, layout, and finishes
- Customise to suit lifestyle or rental plans
Step 3: Approvals & Compliance
- Apply for planning/building approvals from your local council
- Conduct necessary site tests (e.g., soil, drainage, fire zoning)
Step 4: Construction
- Foundations, frame, roofing, and fit-out
- Plumbing, electrical, flooring, painting, and more
Step 5: Handover
- Final walkthrough
- Handover of keys, compliance certificates, and warranties
Common Uses for Custom Granny Flats in WA
Customisation also allows you to design the flat around its purpose. Here are some popular uses:
Multigenerational Living
Keep ageing parents or adult kids close by while giving everyone privacy and independence.
Airbnb or Short-Stay Rental
Design an appealing, unique space that meets guest expectations and offers high returns.
Home Office + Studio Combo
Create a functional workspace away from the main house, with the added benefit of a future guest flat.
Long-Term Tenant Rental
Add a self-contained unit for passive income, with features that appeal to local renters.
Choosing the Right Builder for Your Custom Granny Flat in Perth
To get the most from your custom build, it’s essential to choose the best granny flat builder for your project.
Look for:
- Experience in custom designs, not just standard plans
- In-house design support or architectural partnerships
- Knowledge of WA council requirements and R-Codes
- Transparent pricing and communication
- Positive reviews and a solid portfolio
Tip: Ask to see recent custom granny flat builds in Perth and speak to past clients if possible.
Final Thoughts
When it comes to granny flats in Perth, one size definitely doesn’t fit all. A custom granny flat allows you to create a space that truly works for your block, your lifestyle, and your future plans—whether that’s family, income, or long-term value.
With the right builder by your side, custom doesn’t have to mean complicated. It means smarter, more efficient design—and a result you’ll love for years to come.
