Provided that:-
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(a) In the case of a domestic building, any part of the building in the rear of the main building which does not extend across more than half the width of the building as measured on the rear main wall may be erected to a height equal to the width of the street on which such building abuts or if such building has no verandahs or balconies projecting over any street and is erected on land leased from the Crown prior to the 26th February, 1903 then such rear part of the building may be erected to a height equal to one and a quarter times the width of the street on which such building abuts but no portion what- soever of the rear part of the building (except any chimney, party wall or parapet not exceeding three feet high) shall extend beyond the heights so determined.
(b) In the case of any existing building which already exceeds in height one and a quarter times the width of the street on which it abuts, the structure of the roof or any part thereof shall not be altered or added to in such a manner that any portion of such structure shall fall outside lines drawn at angles of sixty degrees with the horizontal from points determined by measuring a full vertical height equal to one and a quarter times the width of such street on the lines of the main walls in the manner described in this sub-section.
(2) In the event of the street on which a building abuts not being level throughout the extent of such building, the height shall be measured from the central point of the external face of the wall abutting on such strect.
(3) The full vertical height allowed by section 95 shall apply only for the width of the building so far as it abuts upon the street by which the height is regulated and the height of any portion of the build- ing which exceeds such width shall be determined by the Building Authority.
(4) In any case which does not fall within the fore- going provisions the height of the building shall be determined in such manner as the Building Authority may direct.
Drainage works.
97. Where in the opinion of the Building Authority Sub-soil the site on which any domestic building is about to drains to be erected or re-erected is so damp as to require sub- be provided soil drains, adequate provision of such drains shall be made to the satisfaction of the Building Authority.
when required.
98. Every owner of a new building shall construct Drains to the ground floor of such building at such sufficiently be provided high level as will allow of the construction of a drain in new and of the provision of the requisite communication buildings. with any public sewer into which such drain may lawfully empty, at a point in the upper half-diameter of such sewer.
99. All works connected with the construction, Drainage repair, amendment, disconnexion, trapping, and venti- works to lation of drains shall be carried out at the cost of the be carried
persons
owner of the building by persons approved by the out by Building Authority under the supervision of his officers approved by and in all respects to his satisfaction,
Building Authority.
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