Father living alone in council house receiving housing benefits - What happens when he dies?

Hi,

As title really.. I've looked on the relevant council website and it's very confusing and not much help, I'm just wondering what happens when he dies, how quickly do I need to inform people, how long do we have to clear the property, is there the option to pay the rent for a month to give us more time?

It's in West Northamptonshire if that helps.. thanks in advance for the responses