Six years after his first visit, Kevin returns to see how the O'Hare's fared with their split-level home cascading down a practically vertical hillside in Belfast.This is Belfast, one of the great cities of the industrial revolution, and home to Thomas and Dervla O'Hare. They've lived here for 18 years, and although they still love their tiny cottage for its compactness, they're about to build something much, much bigger. They're building a 21st century answer to the Roman villa, with a copper roof, glass and concrete walls and vast amounts of living space all arranged around a central courtyard. In order to cope with the incredibly steep slope the house was divided across three levels. At the base of the building there is a garage and all the utilities. Through the front door a double-width processional staircase leads up to the living and dining areas.