You seem a bit confused Elley. LHA is local hosing allowance, it's the amount that the local councils set for rent they will pay. If you are working and living in a high rent area on a lowish wage you might get LHA or housing benefit. If you moved to a cheaper area to buy, your mortgage application would be assessed on what you earn and your ability to repay. You can't count LHA as income and they won't pay your mortgage for you if you do buy.