Planning a rear extension and builders have said we need an internal step down from existing kitchen (new kitchen and island will be in this part) to 4m extension which will have dining table and sofa area and bifold doors to garden. This is because the garden slopes down and also to accommodate a pitched roof as we have low windows on first floor and don't want a flat roof. I quite like the idea of the step down as it will separate a large space into two zones - the 'kitchen room' and 'garden room' and lower level will be closer to garden. Has anyone done this and could share photos?? Was it successful or do you regret it and wish you had gone for a level floor throughout kitchen and extension? TIA!