Notice of the Ministry of Construction on Issuing the National Standard "Code for Residential Design": 3.6 storeys high, 3.6. 1 ordinary residence should not be higher than 2.80 m. 3.6.2 The indoor clear height of bedroom and living room (hall) should not be less than 2.40m, the local clear height should not be less than 2 2. 10/0m, and its area should not be greater than 1/3 of the indoor usable area. 3.6.3 When the space in the sloping roof is used as bedroom and living room (hall), the indoor clear height of 1/2 area shall not be less than 2. 10m. 3.6.4 The indoor clear height of the kitchen and bathroom should not be less than 2.20m. 3.6.5 The clear distance between the lower surface of the horizontal drainage pipe of the kitchen and bathroom and the floor and ground should not be less than 1.90 m, and it will not affect the opening of doors and sashes.