Section 24(c) in Punjab Urban Planning and Development Authority Building Rules, 2013
(c)The basement shall have the following requirements:(i)Basement shall be at least 2.5 meter in height from the floor to the underside of the roof slab or ceiling;(ii)Adequate ventilation shall be provided for the basement. Any deficiency may be met by providing adequate mechanical ventilation in the form of blowers, exhaust fans, air conditioning system;(iii)The minimum height of the ceiling of first level basement shall be 0.9 meters and maximum 1.2 meters above the average surrounding ground level;(iv)Adequate arrangement shall be made such that surface drainage does not enter the basement;(v)There shall be provisions of sufficient doors in case the basement is used for office or commercial purposes and maximum travel distance from any point to the door shall not exceed 15 meters; and(vi)In case, the basement is allowed beyond the building envelope then the level of the basement shall be at the ground floor level and the slabs should be designed to bear the load of fire tenders.
