Open Question: How do you obtain a quote for homeowners insurance on a newly constructed home?

I know insurance companies typically rely on public records for data on the house when giving a quote on a house. However, what if the house is brand new and the construction is not yet completed. The data on the house wont be public until we close on the house, yet we cannot close on the house until we have homeowners insurance. How does the insurance company give us a quote without the