It is already converted to a second home by the fire. A rental property has to be available to rent during any period where you are deducting expenses. Unless you can figure out a way to list the empty land as available to rent it can't be rental property.
For now, you can deduct any property taxes or mortgage interest as part of your personal itemized deductions (if you qualify) and add up any costs that are incurred to add to the basis of the property once it is completed and available to rent again.
@MapsTaxOy
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