Local historic districts subject exterior changes to review by a commission, under standards adopted by ordinance.
Designation. By study committee report, public hearing and ordinance, with criteria and boundaries. Designation restricts the property and is frequently contested by owners.
Certificate of appropriateness required before exterior alteration, demolition or new construction within the district. Interior work is generally outside the scope.
Standards. Most ordinances adopt the federal rehabilitation standards, which address retaining historic character, repairing rather than replacing, and distinguishing new work from old.
Denials and hardship. Ordinances typically provide a hardship route where the standards would prevent all reasonable use, and constitutional takings claims follow denials that leave a property unusable.
Demolition. Delayed rather than prohibited in many ordinances, with a stay period during which alternatives are explored.
Incentives. Federal and state rehabilitation tax credits for income-producing certified historic structures, requiring a multi-part certification process and compliance with the standards — which means the approval sequence must be followed before work begins.
Practical guidance. Engage the commission early with a concept, since approvals turn on materials and details that are cheaper to change on paper.