United Kingdom 
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We couldn’t find any streaming options in Australia, but House Rules - Season 4 is available in the United States and 4 other countries on Amazon Prime Video, Amazon Prime Video with Ads, and 2 other services.
With big challenges, big decisions, big designs, and big Aussie families, it's Crowded House Rules. Six new teams from around Australia are set to take on the biggest challenge of their lives. They all have one thing in common: a lack of space. Their family has grown but their house hasn't. It's 'Crowded' House Rules, and this time the teams are doing it for their families.
