There are rules about who you can live with and still be eligible for Severe Disability Premium.
You can still be eligible if all the people you live with meet any 1 of the following criteria. The criteria are the same if:
someone moves in with you, or
you move in with someone else
Either of these may be a “change in circumstances”. This means you need to start claiming Universal Credit. You cannot receive this disability premium and Universal Credit, but you may be eligible for transitional payments.
There are 2 other disability premiums with different eligibility criteria:
Get advice if you live with someone who is a close relative and any of the following apply. This is when you either:
jointly own your home, or
are jointly responsible for paying the rent or mortgage
Get advice if you receive Housing Benefit. The eligibility criteria for Housing Benefit are different from Severe Disability Premium.
You cannot receive Severe Disability Premium and Universal Credit at the same time. If you are already receiving Severe Disability Premium, you may be eligible for transitional payments. Your income will usually be lower if you move to Universal Credit.