NBC Plinth: 450 mm Habitable room: Clear height - 2.75 m Area - 9.5 sq.m. Minimum width - 2.4 m Kitchen: Minimum area: 5 sq.m. Storage: 4.5 sq.m. Minimum width: 1.8 m Bath and WC: 2.8 sqm min width 1.8m WC: 0.9 x 0.9 Sunk: min. 300 mm Headroom: minimum 2.2 m