From Longman Dictionary of Contemporary Englishsplit-levelˌsplit-ˈlevel adjective AADHHa split-level house, room, or building has floors at different heights in different parts
Examples from the Corpus
split-level• The upstairs restaurant was a split-level affair which might once have been elegant.• They were standing on the lower section, with a fire door leading on to a split-level landing.• Above: View from the guest bedroom, of Ray Talbot's split-level pool.• He examined the long split-level room stretching away from him to the tall windows at the far end.• It was a glitzy split-level shopping centre with brightly lit window displays of expensive fashions.• There is a pool bordered by split-level sun terraces with deck-chairs and sun umbrellas and a small garden. 