We actually have no side access, neither do next door, the 2 houses have been extended to form a separated terrace, though next doors's is a garage through which (i think) the water flows from the street. I might suggest to him that he sandbag up his garage doors, and see if it makes any difference, but theres still the water from the gardens above us. We have sandbagged across the driveway, so neither of our cars can get in now.