Considering an extension, and would like to have an au pair in the future. Our roof is shallow so it’s difficult to go up and we don’t have enough bedrooms for an au pair as is. However, it seems likely that we could get planning permission for two rooms and a bedroom in our garden, so unconnected to the house (about20 yards away). We’re so rounded by houses and gardens on all sides so the only access would be through the house. Is such a set up a big no-no for an au pair?