Granny Flats Building Cost Factors: Points To Keep In Mind While Buying

Are you thinking about adding a granny apartment to your home and want to know how much it would cost? A granny flats building cost factors might be a wonderful alternative for an older parent looking for a place to live.

It can also be used to house visitors or older children who aren’t quite ready to move out. 

If you opt to rent out your granny apartment, you will have an easy source of extra cash. So, how much would Granny Flat Solutions AU set you back? Below, we’ve looked at the market rates. 

log cabin granny flat

Prices for Granny Flats in Australia 

Granny flats can be built in a variety of styles, with a wide range of construction costs. For example, you wouldn’t anticipate the cost of a brick granny flat to be the same as the cost of another sort of granny flat. 

According to estimates supplied by various builders and providers in the local market, granny flat construction costs in Sydney range from $50,000 to over $120,000. The final price will be determined by a number of factors, including: 

  • square footage of the granny flat
  • state of the ground
  • materials and finishes that were utilized

According to a survey by BMT Tax Depreciation, the average cost of constructing a custom granny flat is $121,000. When determining the cost of a granny flat in Australia, you must keep in mind that there are a variety of other expenses to consider, such as council fees. We can explain it all for you if you give us a call or drop us an email. 

Electrical and plumbing need are among the most frequent costs. It’s a good idea to budget at least $3,000 for such costs. If you plan to rent the granny flat, consider adding privacy features such as fencing around the structure. 

Granny flat with fence being installed

Price of a 1-Bedroom Granny Flat 

A one-bedroom granny flat is a great way to make the most of your property’s limited space. It’s perfect for extended family, elder children who are still living at home, or a guest house. A self-contained granny flat in Sydney would cost between $85,000 and $100,000 for a normal one-bedroom, ranging from 35m2 to 45m2. 

Standard fixtures and expert construction from a renowned and licensed granny flat builder, such as ourselves, are included in the price. 

Prices for a 2-Bedroom Granny Flat 

Two-bedroom granny flats provide a convenient living place for grandparents as well as comfortable lodging for visitors. Give us a call if you’re interested in a 60m2 two-bedroom granny flat designed to your specifications. 

Compare quotations from different granny flat firms carefully if you have them. Some businesses include plumbing, electricity, and other extra fees in their estimates, while others do not.

While prices for two-bedroom granny flats vary depending on the builder, experts recommend budgeting around $130,000 for a unit that can comfortably house at least three adults, or two adults and one child. 


Finding the best contractor for the task, such as ourselves, is the most reliable way to build a granny flat. You want to work with people that have the expertise and experience to develop granny flats that match the demands of their clients, as well as a granny flat builder who has completed a number of successful projects in the past.

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