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 finalized data on the home? Do they come out and inspect it and if so wouldn't the builder not like a company inspecting the home before its even completed? The house is in Florida if that matters and we are not first time homeowners. More specifically, how can the insurance company write a contract without official public data. Obviously they're not going to trust my word for it on the material, sq footage, ect and I am not sure how builders feel about their houses being checked out by insurance companies before they're even done building, or is that common practice?