How much lower is the backyard space of a general house than the homestead?

According to the usual building code, the height of the balcony behind the building needs to be lower than the indoor floor by more than 10cm, but this is only the height difference in the ideal state. Generally, the height difference of self-built houses in rural areas will exceed this figure, which is generally between 15 ~ 30cm, while the height difference of high-rise buildings is above 45cm. Therefore, the height difference behind the house should not be too small, and it should be as high as possible if conditions permit.

In low-lying areas or rural self-built houses with poor drainage, the height difference behind the house can reach more than 30cm.

A few rural self-built houses, the homestead is located in a low-lying place, and the drainage is not smooth. As long as it rains, it is easy to cause water accumulation. In this case, the floor of the house is at least 30cm higher than the floor behind the house. At present, many rural self-built houses have at least 3 ~ 5 steps from the outside ground to the interior, and each step is 12 ~ 15 cm, with a height of at least 50cm.

Generally speaking, whether it is to prevent moisture or to prevent the external terrace from being forcibly raised in the future, such problems will occur. For example, there is a road outside the house, and this road has been rebuilt and raised several times, so personally, the minimum height of the ground and external terrace of rural self-built houses should be 45cm, and three steps are the most suitable.