Proportion of site for dwelling-house which may be built upon.
13. The total area covered by all the buildings (including verandahs erected or re-erected on any site used for a dwelling-house) shall not exceed three-fourths of the total area of the site. But in the case of rebuilding this rule will not apply in a case in which the site is less than 500 square feet.
Open space in rear of building.
14. Except in localities where the erection of only detached buildings is allowed, there must ordinarily be, in the absence of any specific permission of the Chairman to the contrary, in the rear of every domestic building an open space extending along the entire width of the building of not less than 10 feet.
Interior courtyards and outwards open spaces to be raised and kept open.
15. Every interior courtyard and every open space prescribed by rule 15 must be raised at least six inches above the level of the centre of the nearest street or road so as to admit of easy drainage into the street.
16. All living rooms should be so placed as to get light and air. For that object all such rooms should have at least one window opening to the outer air direct, or into a verandah.
Height of room.
17. The height of the room on the basement floor shall be not less than nine feet.
Water spouts.