ELi5 – How are street adresses determined / how do they get numbered?

Question

ELi5 – How are street adresses determined / how do they get numbered?

In: 59

Answer 1

My friends family owns a real-estate development company; They are the ones that buy the land, put in the streets the water, power etc and then sell the developed lots to a home builder.
He said they are allowed to name them what ever they want as long as there is no existing duplication on the books, which is pretty easy since there are so many designations ie street, parkway, lane etc.
Most of the streets in the subdivisions they have done have at least 1 street named after each child in the family.