Granny Flats Perth
Custom Granny Flat Builders in Perth Tailored to Your Needs
Sertorio Homes Granny Flats Perth
Granny Flats That Reflect Your Style: Custom Builds in Perth

Whether you’re looking to create a cozy retreat for your extended family or a stylish space for your growing household, Sertorio Homes is here to make your vision a reality. We offer affordable, custom-built granny flats that can range from one to three bedrooms, designed to fit perfectly with your needs and lifestyle.
With over 40 years of experience, we use the latest 3D-imaging technology to bring your ideas to life, ensuring you can see and refine your design before we begin construction. Our team will work with you to develop detailed floor plans, including options for semi-ensuites, kitchens, living areas, and more. We also offer customizable features like built-in robes, laundry areas, porches, and alfresco spaces.
No matter the size or shape of your block, we tailor each project to fit seamlessly into your space, with floor plans ranging from 50m² to 70m² (subject to planning approval). Let Sertorio Homes turn your granny flat dreams into a practical and beautiful reality.
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Your Step-by-Step Guide to a Smooth Granny Flat Extension with Sertorio Homes
It all begins with a free, no-obligation consultation with our friendly team. We’ll sit down with you to discuss your granny flat extension ideas and help you choose colors, materials, and construction options, whether you prefer double brick or thermal walls. We’ll also provide a clear breakdown of costs so you can start with complete peace of mind.
Once we finalize your design, budget, and timeline, we’ll handle the paperwork and secure the necessary council approvals on your behalf. With everything in place, our expert team will start the build, both on-site and off-site, to create a beautiful and functional granny flat extension you’ll be thrilled to call your own.

Explore Our Custom Granny Flat Designs
Sertorio Homes has evolved into one of Perth’s top specialists in Granny Flat builds and extensions. Explore our collection of innovative and Granny Flat designs below to see how we can help you create the perfect space tailored to your needs.
Latrobe
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Gaudi
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Duo
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
The Trio
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
The Trilogy
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Solo MK 2
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Solo
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Rossini
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Puccini
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Kahn
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Jefferson
Affordable granny flat solutions in Perth: 1-3 bedroom detached homes. Sertorio Homes offers a cost-effective alternative to upsizing, with 40+ years of experience, trusted tradesmen, and advanced 3D imaging. Explore granny flat designs and get a personalised quote...
Aalto
Granny flats are an affordable way to build 1, 2 or 3 bedroom detached homes. Granny flat construction in Perth, especially, can be cheaper than selling and buying a bigger home. Sertorio Homes use their 40+ years of experience, their trusted network of tradesmen and...
Let's Build Your Dream Grany Flat Together – Contact Us Now!
If you’re looking for a granny flat extension or renovation in Perth, trust the company with more than 40 years of experience. Get in touch with the Sertorio Homes team 08 9244 1993 for a no-obligation consultation today.
Sertorio Homes Perth FAQs: Everything You Need to Know


Why Choose Us
What sets Sertorio Homes apart
Our numerous awards, glowing client testimonials, and trusted relationships with our network of tradesmen showcase our commitment to being your top choice for home improvements in Perth.
You’re always first
With Sertorio Homes, your imagination leads the way. We turn your vision into a reality that will exceed your expectations and become a home to cherish for years to come.
Quality. Always.
Sertorio Home believes in the traditional values of care and craftsmanship. We combine this ethos with modern technology to deliver only the best in custom-designed homes.
Honesty
With Sertorio Homes and our team of trusted experts, you know what you’re getting. We start by offering a no-obligation consultation, and a fixed-price contract that has a 3D walkthrough of your designs thrown in. With us, you’ll see your home realised before it’s built.

Extend and Add
We’re here to help you turn your ideas into value-adding extensions that enhance the beauty and functionality of the home you already love, whether single- or double-storey.

Renovate
Transform your home effortlessly and beautifully with our hassle-free renovations that expertly fuse your ideas with our redesign expertise.

Granny Flats
Unlock the potential of your living space with our personalized granny flats, designed to enhance your lifestyle and fit seamlessly within your budget.

Build
We're committed to bringing your dream home to life, from initial visualization to final construction. Our specialists ensure your home reflects your unique vision.