The conventional planning view has been that low levels of car ownership can be expected amongst elderly people, and accordingly, parking requirements at retirement housing need only be minimal. Perhaps this view is becoming a little outdated, as an inspector determining an appeal against the refusal of planning permission for sheltered retirement apartments in Essex points out (DCS Number 400-019-603):
“I do not subscribe to the notion that retired occupants would by their very nature be less likely to own a vehicle. I would in fact suggest it is quite to the contrary, appreciating that self-reliance and freedom/distance of movement would be a value held high by those at a stage in their life where they have more free time.”
Of course, whether having a nonagenarian behind the wheel of a car is a good idea is another thing.
Section 7.237 of DCP Online addresses the topic of parking at retirement housing.