The no-consent granny flat law changes came in this week. 

That means you can build an up-to-70sqm dwelling in your backyard without having to ask the council if you're allowed to. 

Getting one set up on your property would set you back at least $200,000, but the question on minds of anyone with enough space for something like this is - how much value will it add? 

They can be rented out for a bit of passive income - but it may not be worth the trouble of getting it fit to rent. 

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