The floor height of commercial housing is 2.8 meters and the net height is 2.55 meters, which is in compliance with national regulations.

According to the "Residential Design Code" 5.5 Floor Height and Interior Clear Height

5.5.1 The residential floor height should be 2.80m.

5.5.2 The indoor clear height of bedrooms and living rooms (halls) should not be less than 2.40m, the local clear height should not be less than 2.10m, and the indoor area with local clear height should not be It should be larger than 1/3 of the indoor use area.

5.5.3 When using the space inside the sloped roof as a bedroom or living room (hall), the indoor clear height of at least 1/2 of the usable area should not be less than 2.10m.

5.5.4 The indoor clear height of the kitchen and bathroom should not be less than 2.20m.

5.5.5 The net distance between the lower surface of the horizontal drainage pipe in the kitchen and bathroom and the floor and ground shall not be less than 1.90m, and shall not affect the opening of doors and window sashes.

Extended information:

When signing the "Commercial Housing Sales Contract" with the developer, the home buyer should make an agreement on the floor height or net height of the house. If the contract stipulates "floor height", it means is the structural elevation on the drawing (referring to the elevation marked in the structural design drawing), which is "net height + floor thickness".

If you see that the planning and design provided by the developer indicates that the floor height of the residential building is 2.80 meters, and the developer also stipulates that the "floor height is 2.8 meters" in the contract, you cannot conclude that the developer is committing fraud.

Because the developer will not change the drawings approved by the construction and planning departments at will, but the construction team may make errors during the actual construction. Moreover, depending on the location, span and building materials of the house, the floor slabs may vary. The thickness is also different, and coupled with the thickness of the cement ash on the surface, the net height of the completed house will also be different.

So, if the floor height of 2.8 meters stipulated in the contract is consistent with the markings on the plans and design drawings provided by the developer, it is normal for the actual measured height of the house (i.e. net height) to be insufficient.

Reference materials:

Baidu Encyclopedia - Floor Height

Baidu Encyclopedia - "Residential Design Code"