Lighting and Ventilation of Room as Requirements of Part of Building in UDCPR 2020

Mar 31, 2024

UDCPR 2020 Chapter 9 is all about the Requirements of Part of the Building as per mentioned in the UDCPR

This is Applicable to all Planning Authorities and Regional Plan Areas except Municipal Corporation of Greater Mumbai, Other Planning Authorities/Special Planning Authorities/ Development Authorities within the limit of Municipal Corporation of Greater Mumbai, MIDC, NAINA, Jawaharlal Nehru Port Trust, Hill Station Municipal Councils, Eco-sensitive/Eco-fragile region notified by MoEF & CC and Lonavala Municipal Council, in Maharashtra.

Rule No. 9.20 Lighting and Ventilation of Room

9.20.1 Adequacy and manner of provision

i) The minimum aggregate area of opening of habitable rooms and kitchens excluding doors shall be not less than 1/10th of the floor area of the room.

ii) No portion of a room shall be assumed to be lighted, if it is more than 7.5 m. away from the opening assumed for light and ventilation, provided an additional depth of any room beyond 7.5 m. may be permitted subject to provision of proportionate increase in the area of the opening.

iii) A staircase shall be deemed to be adequately lighted and ventilated, if it has one or more openings and an area taken together measures not less than 1.0 sq.m. per landing on the external wall.

iv) An opening with a minimum area of 1.0 Sq.m. in a kitchen, and 0.30 sq.m. with one dimension of 0.30 m. for any bathroom, water closet or store shall be treated as adequate.

9.20.2 Ventilation Shaft

For ventilating the spaces for water closets & bathrooms, if not opening on front, side, rear & interior open spaces, these shall open on the ventilation shaft, the size of which shall not be less than the values given in the table below :-

Table No.9-C - Ventilation Shaft
Sr. No	Height of Buildings in m.	Cross-section of Ventilation shaft in Sq.m.	Minimum one dimension of the shaft in m.
(1)	(2)	(3)	(4)
1	Upto 10	1.2	0.9
2	Upto 12	2.4	1.2
3	Upto 18	4.0	1.5
4	Upto 24	5.4	1.8
5	Upto 30	8.0	2.4
6	Above 30	9.0	3.0

Note :-

a) For buildings above 30.0 m., a mechanical ventilation system shall be installed beside the provisions of the minimum ventilation shaft.

b) For fully air-conditioned residential/other buildings, the

9.20.3 Artificial Lightning and Mechanical Ventilation

Where lighting and ventilation requirements are not met through daylighting and natural ventilation, they shall be ensured through artificial lighting and ventilation in accordance with the provisions of Part 8, Building