When you say home assessment?
what assessment would that be for?
Do you mean assessed in his home for needs he may have around his home i.e rail's equipment ect or a carer to come in too visit him?.
your/his gp should be able to refer him to be assessed by an occupational therapist & local health team who'll come in too assess his needs & provide equipment or alterations he is in need of.
If that is not what you mean please expand ?.