Build a Granny flat in Perth, WA
Granny Flats: Add value to your property and your life
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Thinking about a granny flat? Enquire now to explore your options.
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Granny Flats
Move-in ready, customised granny flats in Perth.Transform your backyard with a Summit Granny Flat.
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Design Consultation
Design Consultation
Explore your granny flat options with a design consultation.
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Guide to Granny Flats
Guide to Granny Flats
Get an understanding of what's involved in building a granny flat.
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Over the past decade, Summit has built thousands of high-quality granny flats across Perth and Western Australia. Our huge range of granny flat designs ensures you’ll find the perfect fit for your needs and block size – from compact studio layouts to spacious two-bedroom configurations.
Whether you’re a retiree wanting to downsize while staying on your own property, a parent looking to create an independent space for adult children, or a family wanting ageing parents nearby but with their own privacy, we understand that every family’s situation is unique.
Our granny flat prices are based on the base build cost for steel frame construction with EPS walling. Double brick construction is available at an additional cost to the advertised price. Site works and finishes are additional costs and will vary depending on your site and selections.
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Delivering granny flat builds in just 6 months using our steel frame construction method
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1-bed granny flat from $171,218
- 2-bed granny flat from $183,555
- 3-bed granny flat from $196,689
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For 50sqm granny flats allow approximately $15,000 for finishes, site works are priced specific to each site
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For 70sqm granny flats allow approximately $20,000 for finishes, site works are priced specific to each site
As Perth’s leading granny flat builder, we take the time to understand your specific needs and help you choose a design that works perfectly for your block, your budget, and your lifestyle goals.
Visit our Granny Flats Display Home at 242 Leach Highway, Myaree WA 6154, by appointment only.
Granny Flat Designs
Pool House
Rental Unit
Display Home
Case Studies
Download Your Guide
Browse Our Modern Granny Flat Designs
We have an innovative range of granny flat designs complete with quality inclusions.
Please note elevation images are for illustrative purposes only and are not necessarily what your individual end design might reflect.
Granny Flat Display home, Pool House, Rental Unit
Astaire Display
21
70m²
Granny Flat, Pool House, Rental Unit
Galtai
21
70m²
Granny Flat, Pool House, Rental Unit
Ellora
11
50m²
Granny Flat, Pool House, Rental Unit
Astaire
21
70m²
Granny Flat, Rental Unit
Verde
22
70m²
Granny Flat, Pool House, Rental Unit
Ninu
22
70m²
Granny Flat, Pool House, Rental Unit
Niah
21
63m²
Granny Flat, Rental Unit
Lohani
21
61m²
Granny Flat, Rental Unit
Kasar
31
70m²
Granny Flat, Pool House, Rental Unit
Gable
11
50m²
Granny Flat, Pool House, Rental Unit
Fingal
21
62m²
Granny Flat, Pool House, Rental Unit
Allar (Detached Studio)
11
70m²
Granny Flat, Pool House, Rental Unit
Allar (Detached Bedroom)
22
70m²
Granny Flat, Pool House, Rental Unit
Tora
211
70m²
Granny Flat, Pool House, Rental Unit
Kebara
11
50m²
Granny Flat, Rental Unit
Greco
22
70m²
Granny Flat, Pool House, Rental Unit
Callao
21
70m²
Your Granny Flat Ready in Just 6 Months
We’ve cut our granny flat build times in half, now completing projects in just 6 months instead of 12. With traditional double brick granny flats still available as an option, by switching to a modern steel frame construction method, we can deliver a faster, more efficient building process.
The beauty of a shorter build time is simple – less waiting, more living. Instead of watching an empty space in your backyard for a full year, you’ll see your granny flat take shape and be ready to enjoy in just six months.
Whether you’re excited to welcome family members into their new space, ready to start working from your perfectly designed home office, or keen to start earning rental income, our faster timeline means you get to experience the benefits of your investment much sooner.
Granny Flats pricelist
Our granny flat prices are based on the base build cost for steel frame construction with EPS walling. Double brick construction is available at an additional cost to the advertised price.
Download pricelistOur guide to granny flats
How much does a granny flat cost?
What sizes do they come in?
What is the process of building a granny flat?
You’ll find the answers to these questions and much more in our comprehensive guide to building a granny flat in Western Australia.
Visit Our Granny Flat Display Home
Experience a Summit granny flat for yourself before you build. Our display home showcases the thoughtful design details that make Summit granny flats special – from quality kitchen fit outs and spacious tiled bathrooms to clever storage solutions and comfortable living areas. You’ll see how we maximise every square metre to create homes that feel open, bright, and welcoming.
We recommend visiting the Astaire display – a stylishly designed two-bedroom, one bathroom granny flat featuring external wall and ceiling insulation, a laundry nook, and built-in robes to both bedrooms.
Monday, Wednesday, Friday: 10am – 1pm
Tuesday & Thursday: 2pm – 5pm
Saturday: 10am – 12pm
Sunday: Closed
How can a granny flat add value to my property?
Granny flats add value to your property in more ways than one. Building a granny flat isn’t just a great way to accommodating a family member, it also presents a short or long-term rental investment opportunity, a home office solution or a comfortable guest house.
Pool Houses
Rental Units
Start living like you’re on a permanent holiday.
A pool house is one of the best improvements you can make to your property, and it’s not just about resale value either. A pool house brings immediate value to your lifestyle as well! Use it as your poolside entertainment hub, a kitchenette for parties, a changing room after a swim, or a comfortable guest house for friends and family.
Turn your backyard into a smart investment.
Western Australia’s economy is booming, but Perth still offers surprisingly affordable property. With buyers and investors flocking here, it’s the perfect time to capitalise. Turn your backyard into a revenue stream with a rental-ready granny flat.
Summit’s six step granny flat build process
As one of Perth’s most awarded granny flat builders, Summit has perfected a streamlined six-step process that takes the complexity out of building. From your initial consultation through to handing over the keys, we guide you through each stage with clear timelines and regular communication.
Our proven process eliminates the guesswork and stress that often comes with building projects. You’ll know exactly what to expect at each step, when it will happen, and what’s required from you. Most importantly, our systematic approach means fewer delays, better quality control, and faster completion times.
See for yourself how easy it is to build with Perth’s most trusted granny flat builder.
Why Build Your Granny Flat with Summit?
For over 48 years, Summit has been helping West Australians create the homes they love. As a local, family-owned Perth builder, renovator, and property developer, we’ve had the privilege of helping over 45,000 families build — and our work continues to be recognised, with multiple HIA wins in 2025, including HIA’s WA Professional Major Builder award.
Whether your granny flat is a retreat for family, a private home office or an investment on your block, we’ll help you plan a space that works for the way you live. Let’s build it together.
Granny Flat Case Studies
Granny Flats journal
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Request an appointment
Speak to someone about your plans. Whether you’re considering building, renovating or developing our experts can guide or answer any questions you might have.
Head Office & Style Studio
242 Leach Hwy, Myaree WA 6154
Monday – Friday: 8am – 5pm
Saturday: 9am – 2pm
Sunday: Closed
Speak to someone about your plans
Whether you’re considering building, renovating or developing our experts can guide answer any questions you might have.
Head Office & Style Studio
242 Leach Hwy, Myaree WA 6154
Office Hours:
Monday to Friday: 8am – 5pm
Saturday: 9am – 2pm
Sunday: Closed
Call Us:
08 9317 0141
