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[Cites 0, Cited by 0] [Section 50] [Entire Act]

State of West Bengal - Subsection

Section 50(3) in West Bengal Municipal (Building) Rules, 2007

(3)Interior Open Space.— The interior open space shall be as follows :
(a)For inner courtyard—
(i)in case the whole of one side or part of at least two sides of every habitable room is not abutting either the front open space, rear open space or side open spaces, it shall abut an interior open space. Interior open space at ground level shall be called courtyard.
(ii)Any room which is separated only by a verandah from the interior open space shall be deemed to abut on such interior open space for the purpose of this rule.
(iii)The minimum dimension of any side of every interior open space (e) at ground level all sides of which are enclosed by a building or part thereof shall be 30% of the height of the building or 3.0 metres, whichever is more (b) at any other level, all sides of which are enclosed by a building or part thereof shall be 30% of the height of the building or 3.0 metres, whichever is more, measured from the said level where interior open space is formed.
(iv)Notwithstanding anything contained in these rules, if all sides of an interior open space is enclosed by a combination of higher and lower blocks of a building, the minimum dimension of such interior open space shall be governed by the height of lower block;
Provided that in no case the covered area under such lower block shall be less than 25% of the total covered area of the concerned building constituting the interior open space.
(v)For the purpose of this rule, if any interior open space or courtyard enclosed on three sides by a building or part thereof is meant to serve lighting and ventilation purpose to a part or whole of one side of one or more habitable rooms, the minimum width of such open space shall be 2.4 metres for buildings upto 14.5 metres in height, 3.5 metres for buildings above 14.5 metres upto 24.0 metres height, 5.0 metres for buildings above 24.0 metres upto 36.0 metres height, and 7.0 metres for all buildings above 36.0 metres height:
Provided that the depth of such open space shall not exceed twice its width and the same may be reduced to 1.2 m if no habitable room, or balcony attached to the habitable room is facing the interior open space. However, in case the depth of such interior open space is less than the width, the same shall not be considered as interior open space but be called as Notch and the same will be permitted without any restriction.
(vi)A ventilation shaft having no access to the same except through one door for service purposes shall not be treated as a courtyard if the area of such shaft is less than 20 square metres.
(b)Ventilation Shafts for Kitchen or Toilet—
For ventilation of bathroom or water closet or if it does not open into the front open space; rear open space or side open space or an interior open space, it shall open into a ventilation shaft which shall not be less than the specification in Table 1 and Table 2 below :—Table 1
Height of the building (in metrs) Minimum size of the ventilation shaft(in squaremeters Minimum width of the shaft(in Meters)
Up to 11.0 2.5 1.2
Above 11.0 but less than 14.5 5 2
From 14.5 but less than 20.0 6 2.4
20.0 and above 9 3
Table 2
Height of the building (in metrs) Minimum size of the ventilation shaft(in squaremeters Minimum width of the shaft(in Meters)
Up to 11.0 2.5 1.2
Above 11.0 but less than 14.5 5 2
From 14.5 but less than 20.0 6 2.4
20.0 and above 9 3
Provided that for any building with a height exceeding 20 metres, a mechanical ventilation system shall be installed in addition to the provisions of minimum ventilation shaft :Provided further that no chajja shall be allowed in any ventilation shaft :Provided also that no ventilation shaft may be required for fully air-conditioned building, or mechanically ventilated toilet, kitchen, bath and W.C.
(c)If there be building other than boundary wall on not more than three sides of a building the minimum width of such courtyard shall not be less than 20% of the height of the building or 2.50 metres, whichever is more.