Lounging Lizards | Typical Granny Flat Site Costs: What Else to Expect
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Typical Granny Flat Site Costs: What Else to Expect

site costs basics

Typical Granny Flat Site Costs: What Else to Expect

Typical Granny Flat Site Costs: What Else to Expect

Building a granny flat typically returns yields greater than that of other properties, and costs are way lower than building a home. Sometimes there will be costs associated with the preparation of the building site that you might not be aware of. These “site costs” can vary greatly and they must be accounted for. In this blog, we will cover which site costs you should factor into your budget.



Due to housing shortages, councils across Australia encourage the building of granny flats, making it easier and cheaper than ever to have a new flat up in your backyard quickly. But you can’t build unless the property is ready to built on. “Site costs” can change the price of your granny flat project quickly, so it’s important to be aware of them. Here are some typical granny flat site costs.


Site Costs:


Site costs are the costs associated with preparing your site for construction a making it livable. Lounging Lizards is as transparent as possible with its site cost prices. The most common site costs are generally those pertaining to infrastructure (accessibility, utilities) or to terrain (excavation).


  • Clearing the way: If you have trees, bushes, large roots, or other issues standing in the way of construction, they will have to be removed. Excavations normally aren’t that expensive since the property is likely to be smaller. Another common project is removing excess soil.


  • Build site infrastructure: These are the costs associated with the site itself. Examples may be extra security fencing, extra permits and fees, and soil tests.


  • Utilities: Bringing your granny up to code is mandatory. You can’t rent it out unless the tenant has access to gas, electricity, and water. Installing these utilities or hooking them up to your home could cost extra. Plumbing is also an issue, especially when the sewer line isn’t cooperating. Installing these new services requires equipment, time, and skilled craftsmen. We will go into full detail in your initial quote after we’ve conducted our test.


  • A driveway: If you want to allow easy access for your tenants, a driveway will be necessary. This might even create other costs, too.

site costs basics

  • Other typical site costs: A few of the regular site costs we experience range from needing a new foundation installed due to soil weakness to building a retaining wall. It all depends on the build site.


Why do costs vary so greatly?


There is no set price on different site costs because each project varies so greatly. Factors include:


  • The slope of your property
  • The type of soil
  • The terrain
  • Accessibility
  • Location of your sewer line
  • The nature of your home’s utilities



Costs associated with preparing your site for the construction and habitation of your new granny are called “site costs” and the better you understand them, the better you will understand the viability of adding a granny to your property. As granny flat builders, we try to be as transparent as possible with each of our quotes, and we will let you know exactly what to expect before we start building.

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