The underlying principle in Category 3 dwellings is that wheelchair adaptable dwellings should be capable of being simply adapted to meet the needs of a wheelchair user, or designed at the outset to do so. In demonstrating compliance for all M4(3) dwellings, a sensible approach would be to firstly design for a wheelchair accessible layout which complies in all aspects with requirements of M4(3) 2b including bathrooms, corridors, doors, bedrooms and kitchens. Designers can then modify that design utilising the greater flexibility provided by requirements for adaptable dwellings.