How Much Does a Granny Flat Cost?
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As with any venture, it is important to consider all possible costs involved before investing in a manufactured home. In this article, we will discuss the overall costs of building, maintaining and powering a granny flat.

Council Fees

One of the first things to watch out for is council fees, generally, a fee depends on the lot and flat size – however, it does not apply to all areas in Northern NSW and Queensland, only some councils.

On site vs Off site

As with any building ventures, there are variations when it comes to the granny flat designs. These are most strongly the differences between choosing a prebuilt granny flats and a flat that will be built and assembled offsite, and then assembled onsite where it is connected to power and plumbing.


Offsite assembling is also known as a modular home. Modular home are suited for difficult, sloping blocks, and can be cheaper than traditional builds. This means that construction and designing occurs in a different place to the area where the flat will reside. Generally, this is significantly cheaper than building a granny flat straight on site. It also removes the potential for delays in the building process.

Custom modular homes are strongly recommended as a way to reduce costs in building. This is because the materials used in construction are used more efficiently, as they are on hand and being used to work on several other homes – therefore, there is less waste and more savings.

Included Costs

It is important to see what is included in the costs of your granny flat before you purchase it. Some agencies may simply provide a shell of a flat, while others will include benchtops, doors and more. This will undoubtedly impact the price.


After a granny flat is built, it will need to be powered. This will include plumbing and electricity. The costs of incorporating such vary from agency to agency, with some agencies offering several free metres and charging $150 per metre after that.

One of the best aspects of granny flats is that they can be adjusted to meet your needs. For example, they can be installed with eco-friendly powering sources, such as solar panels and solar water heating.

Questions? Contact Us

If you have any questions about this article, our modular home manufacturers, or about our wide selection of granny flat, cabin and modular home designs, contact us today on (07) 3889 7385. Our team is only a phone call or email away.