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When contemplating the acquisition of a granny flat kit home, it’s natural to harbor a myriad of queries and reservations. Through this discourse, my aim is to comprehensively illuminate these topics. Thus, we shall delve into the following areas of consideration:

1. Understanding Granny Flat Kit Homes

An introduction to the concept of kit homes and how they differentiate from traditional construction methods. This section can outline the modular approach, ease of assembly, and potential for customization.

2. Assessing Cost-Effectiveness

A thorough analysis of the financial implications, including initial costs, potential savings compared to conventional construction, and long-term value. We shall explore how kit homes can be a budget-friendly solution without compromising on quality or aesthetics.

3. Evaluating Legalities and Compliance

Discussion about the various legal requirements, zoning laws, permits, and building regulations that you must navigate to ensure that your granny flat meets all legal standards and local code requirements.

4. Understanding the Building Process

A step-by-step walkthrough of what the building process entails from the moment of purchase, through delivery, to assembly. This guidance includes potential timelines, stages of construction, and what you can expect during each phase.

5. Determining Suitability for Your Property

An investigation into how to assess if a granny flat kit home is a viable option for your specific property. This would consider factors such as land size, terrain, access, and the existing structure’s compatibility.

6. Quality and Durability Concerns

An inspection of the materials, design standards, and longevity of kit homes. We’ll examine how they stand up against the elements and everyday wear and tear, alongside maintenance requirements.

7. Design Options and Customization

A look at the variety of design styles available and how you can tailor these pre-fabricated homes to suit your taste and needs. This can touch upon internal and external customization options.

8. Energy Efficiency and Sustainability

An analysis of the energy-saving features of granny flat kit homes and their environmental impact. We’ll discuss insulation, energy-efficient design, and the use of sustainable materials.

9. Post-Assembly Aspects

Finally, we’ll touch upon what happens once the granny flat is constructed. We’ll cover topics like interior decorating, landscaping, and integration with the main residence or property.


The intention of addressing these comprehensive topics is to offer clarity and confidence to prospective buyers. A well-informed decision is critical when it comes to significant investments like a granny flat kit home. So, through this article, we aim to empower you with knowledge, dispel doubts, and prepare you for the exciting journey of expanding your living space.
  • What it Costs to Build a Granny Flat Kit Home
  • What Your Granny Flat Kit Home Includes for This Price, and What is Excluded
  • Granny Flat DIY Kits, How to Install Them 
  • Kitchens and Kitchenettes for Your Granny Flat Kit Home
  • Our Portable Granny Flat
  • What Is a Granny Flat Kit on Wheels
  • What Size Your Granny Flat Kit Home Is Allowed to Be
  • How To “Cyclone Proof” Your Granny Flat Kit Home
  • If You Can Build Your Own Granny Flat
  • If You Can Add Extensions to Your Granny Flat Kits 
  • Floorplans for Granny Flat Kits
  • Our Granny Flat Kit Guide

So, I will be going into enormous detail about your granny flat kit home (you may also see these called a flatpack).  Let’s not waste time, let’s begin.

Granny Flat Kit Cost

Our granny flat kits commence at approximately $1200 + GST for every square meter, covering everything up to the lockup phase.
For instance, taking a 60 square meter granny flat kit — the maximum size permitted in NSW — the comprehensive cost would amount to $72,000 + GST.
In the following sections, I’ll detail the inclusions and exclusions of this pricing.

What Comes with Your Granny Flat Kit?

Included in the lockup phase of your granny flat kit are the following components:
  • All necessary windows.
  • All essential doors.
  • Complete roofing, inclusive of fascia and guttering.
  • Framing – The structure is designed for transportability, commonly utilizing steel for its resilience to deformation during transit.
  • Thermal insulation.
  • Internal gyprock (plasterboard for walls).
  • Utilities setup – Electrical systems such as outlets, lighting fixtures, and cabling are in place, as is the plumbing. All adhere to Australian standards. You will, however, need to engage certified electricians and plumbers to conclude the kit home’s utility connections.
  • A detailed manual that provides explicit instructions on assembling the kit home.
The content above outlines what is encompassed up to the lockup stage of your granny flat’s construction.

What Does Not Come with Your Granny Flat Kit?

It’s crucial to address a common misconception at this juncture: many hold the belief that a granny flat kit contains everything required to complete the construction. However, here’s the truth: it’s vital to carefully review your “kit-list” to understand that several components you might desire or deem necessary are often not included.
For instance, our granny flat kits do not provide:
  • A kitchen setup.
  • Bathroom fixtures.
  • Any kind of flooring, be it carpet, vinyl, or laminate floorboards.
  • The foundation for the flat, like a concrete slab or piers.
To clarify further – the $1200 + GST per square meter rate up to lockup gives you what can essentially be described as an empty shell.
You might then ask, “What exactly am I paying for?” Simply put, while the foundational base is not included, you receive all other components that constitute everything above ground level.
Should you opt for additional features like a bathroom, please know that we can certainly accommodate this request. The pricing for incorporating a kitchen or bathroom can be found here. (Dean, kindly link to the updated page with the pricing details).
Another crucial aspect to consider is that kit homes are designed in a one-size-fits-all manner, without specific tailoring to the regulations of the region you reside in. Differences in local regulations across various suburbs may necessitate additional adjustments. This is something I’ll delve into further under the “Cyclone Rated Granny Flat Kit” section, where I elaborate on adapting the given kit home to comply with the local standards of your area.

Granny Flat DIY Kit

If you’ve never tackled construction before and are concerned about the complexities of installing your granny flat kit home, or if you’re questioning the need for a professional builder given your lack of building experience, let’s address this candidly.
The truth is, assembling your kit home will require more than simply following the manual provided. Even with detailed instructions, building a structure involves various challenges and skills that go beyond basic assembly.
granny flat kit
granny flat kit
To ensure your granny flat kit home passes inspection and receives its Occupation Certificate upon completion, it’s prudent to seek some guidance from professional builders for specific tasks.
I recommend getting assistance with the following aspects:
  1. Constructing your foundation.
  2. Implementing tie-down measures – This involves securely affixing your roofing to the foundation and the frame to the roofing.
  3. Completing your roofing, which includes the installation of elements like downpipes.
Seeking help from individuals with expertise in these areas is crucial to ensure safety throughout the building process, given the high-risk nature of these tasks.
Moreover, these aspects can be complex—making a mistake by overlooking a single step, or carrying out tasks out of sequence, can lead to significant issues.
There are also seemingly minor details that many people might not be aware of but could result in a failed inspection. For instance, incorrect angles or missing a tie-down could prevent your work from being certified.
Therefore, for those tasks where you lack the confidence to execute them correctly, I strongly advise hiring certified builders or tradespeople. In Australia, it’s mandatory to have licensed plumbers and electricians for any construction work.
At DIY Granny Flat, we’re eager to assist you in this regard. We have connections with numerous builders in the construction industry, so feel free to ask us for recommendations of professionals in your area to obtain quotations.
Ultimately, our goal is for you to cherish your granny flat kit home as much as we do, and ensuring it’s built correctly and safely is a crucial step towards that.
granny flat kit

Granny Flat Kitchenettes

Discussions around kitchenettes are quite pertinent, especially if you’re contemplating their inclusion in your kit home in place of a full-sized kitchen.
Essentially, a kitchenette serves as a compact version of a kitchen. They’re typically equipped with basic, smaller-scale appliances, such as a sink, a mini-fridge, and a microwave. This makes them an ideal choice for studio apartments, which are generally smaller than the average granny flat, as they occupy less space.
For those considering this option, you can draw some inspiration from various kitchenette designs tailored for Studio Granny Flats.
If you decide to proceed with us up to the lockup phase of your kit home, integrating a kitchen into your design is certainly something we can accommodate. Alternatively, you have the option to undertake this task yourself post-lockup, sourcing appliances and fixtures from stores like Bunnings. For those taking the DIY route, leveraging online resources for planning and visualizing your design in 3D can be incredibly helpful in bringing your vision to life.

Portable Granny Flats

We also have another version of a kit home, known as the Expandable.

This is a two-bedroom granny flat with a kitchenette (no stove or oven) and a bathroom.

granny flat kit

If you’re in search of a design that seamlessly incorporates all these features, then the Expandable might capture your interest. True to its name, it’s an expandable, fold-out container home, setting it apart from standard kit homes.
What distinguishes the Expandable is its innovative folding mechanism. This feature enables the walls, floor, and roof to effortlessly extend and retract as needed. Thus, it can be condensed into a compact form for delivery in a shipping container and then effortlessly expands into a two-bedroom granny flat once at the site. This unique capability offers flexibility and convenience, presenting an attractive option for those looking for a practical and efficient living solution.
granny flat kit
The advantage of such a design is its quick and straightforward setup process. Because it only takes a few hours to unfold, your construction costs are significantly minimized. Most of the remaining work can be easily managed with assistance from a few friends or local tradespeople.
Here’s what you’ll need to do to complete the installation of this kit home:
  1. Extend its adjustable legs beside a 7 x 7m wide space that you have previously leveled.
  2. Elevate the roofing, securing it temporarily with strong steel posts while preparing to erect the walls.
  3. Deploy the flooring to meet the adjustable legs you’ve extended.
  4. With the flooring set, unfold the side walls one by one, lifting them to connect with the roof. After positioning, the temporary steel supports can be removed.
  5. Proceed to raise the opposite side walls in the same fashion, ensuring all four walls are correctly aligned.
  6. Secure the walls by bolting them in place.
  7. Install internal partition walls to define rooms such as the bathroom, bedroom, living room, and kitchen.
  8. Apply duct tape to the corners of each wall for windproof sealing.
  9. Attach flashing and guttering to the exterior.
  10. Install any windows by sliding them into their designated slots and securing them with bolts. Adhesive required parts are pre-applied.
Finishing the interior includes:
  • Attaching PVC corner plates on all L-shaped corners with rivets for a cleaner finish.
  • Adding skirting with mounting screws for decorative enhancement.
  • Installing pre-assembled kitchen cabinetry against the walls.
And that’s all there is to it – a process designed for ease and efficiency.
This unit is also designed with the latest technology and advanced features, making it one of the most modern offerings on the Australian market.
Additionally, each unit comes with a 3-year warranty, providing peace of mind.
Delivery is available directly to your doorstep in WA, NSW, VIC, or QLD, covering both suburban and rural areas.
Please note: It’s essential to have your foundation or footings ready before delivery. You’ll also need to organize electrical and plumbing connections to be completed on-site by licensed professionals.

Granny Flat Kit on Wheels

The trend of marketing expandable dwellings on trailers reflects an innovative approach to housing, akin to the Expandable we discussed earlier, but with a notable twist—mobility. These mobile granny flat kits, mounted on wheels, are conceptualized to adhere to the statutory definition of a ‘caravan’. This classification hinges on several criteria:
  1. The presence of a trailer beneath the structure.
  2. A chassis and wheels that meet standard trailer specifications.
  3. A Vehicle Identification Number (VIN).
  4. An equipped emergency brake system.
In New South Wales, legislative stipulations, accessible via [this link] (insert URL here), articulate that council approval for caravans diverges significantly from that required for stationary granny flats.
Consequently, you might circumvent the necessity for a Development Application (DA) or a Complying Development Certificate (CDC) to station these units on your property.
However, it’s crucial to closely examine the legislation, elucidated in sections such as:
  • Section 77 (1): It permits the usage of such caravans on vacant land but restricts occupancy to a cumulative 60 days annually, with no single stay exceeding 48 hours.
  • Section 77(b): This clause allows for a single caravan to be placed on property leased by the caravan’s owner, given a direct link to the property’s landlord. Typically, this indicates that the caravan’s possessor will also own the main residence on the land.
The pivot towards ‘caravans’ represents a strategy by numerous companies to navigate around the cumbersome process of securing council approval required for traditional granny flats or portable homes. This method provides a ready-to-occupy onsite living solution.
Nonetheless, it’s imperative to understand the limitations and legalities concerning residency periods, eligibility, and locational constraints before investing in this option.
For a comprehensive exploration of this subject, including obtaining council approval when necessary, my blog post “Caravans As Granny Flats – Here are the Rules” offers an in-depth look at the regulations and guidelines governing such arrangements.

How Big Can the Kit Be?

The possibilities for your kit home are virtually limitless, contingent upon adherence to your local council’s regulations, which you can delve into via this blog.
The power of choice lies with you. Whether you envision your kit home as a quaint Studio Apartment, a cozy Backyard Cabin, a spacious one-bedroom granny flat, or even expanding to a two or three-bedroom granny flat, we’re here to turn your dream into reality. We provide the materials and tailor the design according to your precise specifications. So, unleash your creativity, sketch out your ideas, and embark on designing a space that perfectly aligns with your needs and property.
Alternatively, if you prefer to explore pre-existing designs, we’ve got you covered. You can peruse our assorted collection of Cabins, Studios, and granny flats.
Remember, our offerings are but one option amongst many. To widen your horizon, we encourage you to check out other remarkable designs and floorplans here. Discover a wealth of inspiration and get a sense of the prices. We’ve compiled this information for you, simplifying your research process.
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