Attribute requirements must be exactly the same as the original window. Is there any legal basis?

There is definitely no specific and separate legal provision, but it can be based on some administrative norms. For example, in the "Regulations on Building Quality and Safety", it is not allowed to change the external wall structure without authorization, and the window hole belongs to the external wall. There are also property management regulations, and the city appearance regulations will stipulate the city appearance. Even the community owners' convention is binding on the owners of this community. Furthermore, if changing windows affects the lighting, ventilation and heat insulation of neighbors, which constitutes infringement, the property, as a community manager, also has the responsibility of management.