Construction Loan & existing building

Our loan will be to construct a duplex on a lot where almost the entire lot is in a SFHA. There is a building on the property that will be destroyed after origination. Isn't flood insurance required on the existing building until it is demolished? Would we be able to get flood insurance on the duplex prior to origination in this situation?

Yes on the building that is going to be demolished. If you don't get a flood policy on the duplex at the time the loan is made, there will be a 30 day wait on the effective date of the policy.