Granny Flat Builders in Perth
Tell us what you need. Our AI helps you build a professional brief for vetted installers, and our team verifies it. Once the quotes roll in, our system automatically compares them so you get a detailed comparison of the best options.
How it works
AI-assisted job brief
Describe your granny flat builders project using the AI assisted chat below. Our system transforms your answers into the perfect brief for local professionals.
Smart quote comparison
Local tradespeople bid on your project while our AI analyses every offer. We highlight the top three recommendations and procvide a detailed comparison so you can choose with confidence.
Connect and book
You get the full contact details for every installer who submitted a quote. Call your top match or any of the others to chat through the job details and get it scheduled.
AI-assisted job brief
Granny Flat Builders · Perth
90+ vetted professionals for Granny Flat Builders in our network available to quote.
Local insights
We mapped the market so you don't have to
We fetched granny flat builders businesses in and around Perth from online sources, then analysed ratings, review volumes, and recent feedback with AI to surface patterns and a side-by-side comparison. Skim the numbers below, then scroll for the full rundown, cautions, and FAQs.
Snapshot - in and around Perth.
8
Suppliers in scope
4.5
Avg. Google rating
184
Reviews analysed
At a glance
Perth Granny Flat Builders suppliers
Compare local granny flat builders suppliers around Perth in one place. Each item shows star ratings, total reviews, distance from the centre of Perth, and an AI-assisted analysis of real customer feedback.
Granny Flats WA
CautionGoogle: 4.0 / 5 · 125 reviews · 10.7 km from search centre
AI-assisted analysis of public reviews:
Reviewers consistently praise the build quality, helpful staff and supervisors who respond quickly when issues come up. A few mentions point to timeline slippage, contract/addendum mismatches and handover cleaning needing tighter attention.
Affordable Granny Flats WA
Google: 5.0 / 5 · 2 reviews · 0.7 km from search centre
AI-assisted analysis of public reviews:
The small review sample focuses on clear explanations, fast communication and helpful guidance through designs and options. Feedback is very positive, but there are only two reviews so the track record is still thin.
Granny Flat Builder WA
Google: 5.0 / 5 · 4 reviews · 31.8 km from search centre
AI-assisted analysis of public reviews:
Reviews describe attentive management, reliable trades and work finished to a high standard, with trustworthiness mentioned more than once. The feedback is favourable but limited, and several comments refer to extensions rather than clearly to granny flats.
Master Modular Granny Flat
Google: 5.0 / 5 · 20 reviews · 20.9 km from search centre
AI-assisted analysis of public reviews:
Reviewers are especially impressed by showroom presentation, finishes and the overall quality feel of the homes. The main theme is strong customer service and low-pressure advice, though the excerpts are more about display visits than completed builds.
innovate granny flats wa
Google: 5.0 / 5 · 4 reviews · 15.0 km from search centre
AI-assisted analysis of public reviews:
Customers highlight easy service, lots of design options and helpful support, including for owner-builders. The review base is very small, so the strongest signal here is friendliness and guidance rather than a long construction history in the excerpts.
Luxury Modular Homes and Granny Flats
Google: 5.0 / 5 · 1 reviews · 0.0 km from search centre
AI-assisted analysis of public reviews:
There is not enough review text here to say much beyond a very limited positive signal. With only one rating and no usable excerpt detail, buyers would need to do more checking themselves.
Fox Granny Flats
CautionGoogle: 4.7 / 5 · 23 reviews · 18.3 km from search centre
AI-assisted analysis of public reviews:
Many reviewers like the customisation, regular updates, speed after approvals and after-sales support. One negative review calls out poor in-office service and pricing that felt high compared with competitors, so value perception may vary.
Granny Flat Masters
CautionGoogle: 2.6 / 5 · 5 reviews · 3.2 km from search centre
AI-assisted analysis of public reviews:
The limited feedback is mixed, with one reviewer unhappy about unreturned calls and broken promises while another says the company stayed honest through delays and delivered a good outcome. With a low overall rating and only a handful of reviews, this is a listing to scrutinise closely.
Cross-Review AI Analysis
What locals are saying in Perth
AI-powered analysis of all of the customer reviews from multiple suppliers in the area.
Across these Perth granny flat builders, the strongest recurring positives are helpful staff, clear guidance through design choices and responsive supervisors or office teams. Several businesses are praised for good finishes, customisation and trades who fix issues quickly or keep clients updated during the build. Communication stands out as a key separator: some listings are repeatedly praised for regular updates, while the weakest-reviewed option is criticised for not returning calls and not keeping promises. There are only a few concrete complaints in the supplied excerpts, mainly around timing, handover cleaning, paperwork alignment and one case of pricing feeling too high. This market looks moderately competitive at the top end, but review depth is uneven. A few businesses have strong ratings with only 1 to 4 reviews, so the most reliable signals come from the larger profiles like Granny Flats WA and Fox Granny Flats.
AI Review Red Flags
What to watch out for in Perth
Fox Granny Flats
- One reviewer felt the in-office service was dismissive at first contact.
- One reviewer considered the quoted pricing high compared with similar alternatives.
- Value perception appears mixed despite otherwise positive build feedback.
Granny Flat Masters
- One reviewer said calls were not returned.
- One reviewer said promises were not kept.
- The low overall rating suggests mixed wider sentiment, so buyers should read low-star reviews closely.
Granny Flats WA
- Google lists an overall rating of 4.0 from 125 reviews—read recent and lower-star reviews on Maps before you decide, not only highlights.
Local questions in Perth
Granny Flats WA has the deepest review base here and is repeatedly praised for build quality, helpful staff and supervisors who sort issues quickly. Fox Granny Flats also stands out for customisation, updates during the build and strong after-sales comments. Master Modular Granny Flat gets very strong praise too, but the excerpts lean more toward showroom and pre-build experience than completed projects.
Granny Flats WA is frequently praised for updates throughout the process and for supervisors who respond quickly to questions and changes. Fox Granny Flats also gets positive mentions for regular emails, calls and build photos. Affordable Granny Flats WA reviews are positive on communication too, but the sample is much smaller.
Yes, but they are concentrated rather than widespread. Granny Flat Masters has a low overall rating and one specific review mentions unreturned calls and promises not being kept, while Fox has one review complaining about poor acknowledgment in the office and pricing that felt uncompetitive. Granny Flats WA is mostly well reviewed, though one customer suggested cleaner handover, better contract alignment and tighter timing would improve the experience.
The repeated themes are quality finishes, responsive communication and a team that makes the process easy to understand. Buyers also appreciate flexibility on design, respectful trades working around occupied homes and fast fixes when something is not quite right. For modular-focused businesses, showroom quality and low-pressure advice show up strongly.
Treat very small review counts as a useful hint, not firm proof of consistency. Listings like Affordable Granny Flats WA, Granny Flat Builder WA and innovate granny flats wa have positive feedback, but there is much less history to compare against higher-volume businesses. If you shortlist them, pay extra attention to whether their communication, inclusions and build examples match the review themes.
Granny Flats WA gets repeated praise for the final product meeting or exceeding expectations. Master Modular Granny Flat is consistently described as a step above in finishes and overall feel, although those comments mostly come from showroom visits. Fox Granny Flats also gets favourable comments on layout, finish and worthwhile upgrade options.
Ask how they handle updates, who your site supervisor will be and how quickly defects or change requests are usually resolved. It is also worth checking exactly what is included in the contract and pre-start documents, because one review mentioned discrepancies and another highlighted perceived value differences between builders. If timing matters, ask what depends on council approval versus actual build time, since reviews distinguish those stages.
Estimate granny flat build cost in Perth
Turnkey-style midpoints for Australia. Pick size and build path. Slab, service connections, council approvals and landscaping are usually extra ($15k–$50k all-in).
Estimates are indicative only. For an accurate price, get free quotes from local tradies above.
General information
Granny Flat Builders in Perth
Your Local Experts for Granny Flats
At Supertrades, we connect you with experienced granny flat builders across Perth. Whether you're considering a custom granny flat or a portable granny flat, our network of professionals is here to help. With a range of options from brick granny flats to prefab granny flats, we make it easy for you to compare quotes and find the best fit for your needs.
Why Choose a Granny Flat?
Granny flats offer a versatile solution for additional living space. Ideal for accommodating family members or as rental properties, these moveable granny flats can enhance your property's value and provide extra income. At Supertrades, we help you navigate the granny flat construction process with ease.
Benefits of Building a Granny Flat
- Increased property value
- Flexible living arrangements
- Potential rental income
- Cost-effective compared to building a new home
- Customisable designs to suit your needs
Get Started Today
Ready to explore your options? Simply fill out our form to receive quotes from local granny builders in Perth. Discover the various granny flat prices and find the perfect solution for your backyard grannys.
What shapes your granny flat quote
1 / 3
Build type
Custom site build versus prefab, portable, or transportable.
Frequently asked questions
The cost for a granny flat from Bunnings can vary significantly based on size and materials. It's best to check their website or visit the store for specific pricing.
Yes, you may be able to claim tax deductions related to a granny flat, particularly if it generates rental income or is used to accommodate family members.
While $400,000 can be enough to build a house, costs can vary greatly depending on location, design, and materials. It's advisable to consult with builders for accurate estimates.
Yes, you can buy a block of land and install a granny flat on it, subject to local council regulations and zoning laws.
The cheapest way to construct a granny flat often involves choosing simple designs and materials, such as prefabricated options or basic structures.
Yes, granny flats can increase the overall value of your property, especially in areas where additional rental income potential is recognised.
The capital gains tax on a $300,000 profit will depend on your specific circumstances, including your income tax rate and any exemptions that may apply.
Yes, you typically need council approval to build a granny flat in WA. Always check local regulations for specific requirements.
A cheaper alternative to a granny flat could be a shed conversion or a small studio if you are looking for additional space without full granny flat construction.
Generally, building a granny flat can be more cost-effective than buying one, particularly when considering long-term value and rental income potential.
The most expensive part of building a house is often the labour and materials, especially for complex designs and high-quality finishes.
The average price range for a 2-bedroom granny flat in Perth typically falls between $100,000 and $200,000, depending on design and specifications.