If you decide to replace the damaged boards to match the existing wood siding, no COA would be required. If the damage turned out to be substantial, requiring the replacement of a great deal of siding and trim, an administrative approval from the Historic Zoning Commission's staff planner would be required. If you decided to reside your house with new material such as vinyl siding, you would have to apply for and obtain a COA from the Historic Zoning Commission.