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But you don't have to ask us, you have to ask the community property and the urban management, and they can extend it if you want you to extend.
Generally, no, if you are doing a sunroom, at most your glass is allowed to be near the drip line!!
No.
According to the national standard "Construction Code for Residential Decoration Engineering GB50327-2001", the waterproof layer should extend from the ground to the wall, 100mm higher than the ground, and the waterproof layer of the bathroom wall shall not be less than meters. >>>More
Yes, but after expanding the width of the doorway, it is necessary to increase the reinforcement of the beam above the door to ensure that the bearing capacity meets the requirements.
This size is possible with a pit spacing of 400 cm, because there is about 4 cm of room to install the toilet.