Here are some idioms which all use the word 'house':
An organisation or a plan that is very weak and can easily be destroyed:
'Although the organisation looked solid it turned out to be a house of cards.'
If two people get on like a house on fire, they like each other very much and become friends very quickly:
'My neighbour and I got on like a house on fire from the first time we met.'
To solve your own problems:
'Put your own house in order before you start giving me advice.'
To be very safe:
'Don't worry, I've parked your car in my garage - it's as safe as houses in there.'
To waste time saying a lot of things that are not important before you get to the subject you want to talk about:
'There's no need to go round the houses, just tell me what's wrong.'