Granny Flats
Granny Flat Cost in Western Sydney 2021
Building cost evolves year to year. Here is what a granny flat actually cost in Western Sydney in 2021.
The 2021 numbers
- 60 sqm 2-bedroom standard finish: $110,000 to $135,000
- Same with premium finishes: $135,000 to $170,000
- 50 sqm 1-bedroom standard: $90,000 to $115,000
What changed from pre-COVID
Timber prices doubled through 2021. Steel up 35 percent. Stone supply was constrained. Labour costs continued upward. The combined impact lifted granny flat prices 10 to 15 percent over 2020 figures.
The 2021 rental yield
Rental of $330 to $460 per week on a $125,000 build delivered 13.7 to 19.1 percent gross yield in 2021. Strong returns continued the granny flat investment cycle that started in the early 2010s.
Frequently Asked Questions
Quick Answers
For a 60 sqm 2-bedroom granny flat: $110,000 to $145,000 turn-key. Pre-COVID prices were lower; supply chain disruption pushed costs up roughly 10 to 15 percent through 2021.
Smaller footprint, simpler approval pathway (CDC), reduced services (one bathroom typically), and tighter spec all reduce cost per square metre slightly below full house.
Generally no. Building costs trend upward over time. Each year of delay typically adds 4 to 8 percent to total project cost. Better to build when budget and approval are ready.
Slab, structure, basic finishes, one bathroom, basic kitchen, basic flooring, basic electrical, basic plumbing, basic landscaping. Premium finishes added $25,000 to $50,000.
$330 to $460 per week typical Western Sydney 2021 rental for a quality 2-bedroom granny flat.
Disclaimer: This article reflects 13 Homes' general experience as a residential builder in NSW. Costs, timelines, council rules and regulations change over time and depend on the specifics of your site, finance situation and selections. Information here should not be treated as legal, financial or engineering advice. Always seek site-specific advice from a qualified builder, certifier and engineer before making a decision on your build.
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