What if the property doesn't give a structural drawing?

Communicate and consult, consult laws and regulations, etc.

Communication and negotiation: you can communicate and negotiate with the property to find out why they don't give the structural drawing. Because the drawings involve trade secrets or copyright issues, or for other reasons. Through communication, we can better understand the location of the property and try our best to reach an understanding.

Consult laws and regulations: If you think that it is a violation of relevant laws and regulations that the property is not provided with structural drawings, you can consult relevant laws and regulations to understand the rights and obligations of the property.