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    National Historic Landmark

    Federally designated as nationally significant — the highest U.S. historic recognition. Section 106 review applies to federal undertakings affecting the property.

    National Register

    Listed on the National Register of Historic Places. Owners may qualify for the 20% federal Historic Rehabilitation Tax Credit on certified rehabilitation work.

    State Register

    Listed on the Massachusetts State Register of Historic Places.

    Local Historic District

    Inside a Local Historic District. Exterior changes visible from a public way require approval from the local historic district commission.

    Local Landmark

    Individually designated by the town as a local landmark. Exterior alterations require commission approval.

    MACRIS Inventory

    Documented in MACRIS, the state historic inventory. Informational only — no regulatory constraints.

    Article 85 (Boston)

    Subject to Boston Article 85 demolition-delay review, which can pause demolition of buildings 50+ years old for up to 90 days.