Skip to content

Santa Clara County · Building on your lot

Historic homes in Santa Clara County

Santa Clara County's own rules on historic homes, with the code text for every value.

Each rule below links to the section of the Santa Clara County Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Santa Clara County's code says

Santa Clara County code What Santa Clara County's code adds
When a building counts as historic
  • 50 years or older to be a landmark; newer ones need time for scholarly perspective or a distinctive style.
    Applies: County landmark designation.
    § C17-5 · code text
    Fifty years or older.
Demolishing an older or historic home
  • Board approval is required before demolition or removal.
    Applies: Formally designated or registered cultural heritage resource.
    § 3.50.070 · code text
    No permit for the demolition or removal of a building or other structure which is a formally designated or registered cultural heritage resource shall be issued until an approval is granted by the Board of Supervisors, pursuant to the applicable procedures and regulations of the Santa Clara County Ordinance Code.
  • Referral to the Historical Heritage Commission, a period to explore alternatives, and a Board of Supervisors public hearing.
    § 3.50.070 · code text
    The demolition permit restrictions, in Section C1-91 of the County Ordinance Code shall apply to the proposed demolition or removal of any individually registered historic building or structure.
  • A landmark alteration permit is required.
    Applies: Historic resource listed in the heritage resource inventory and meeting landmark significance criteria.
    § C17-23 · code text
    When the Department of Planning and Development identifies that the subject historic resource proposed for demolition is listed in the heritage resource inventory and meets the criteria of significance for a landmark as prescribed in Article II, the applicant shall be informed that a landmark alteration permit is required for such demolition.
Mills Act tax incentive
  • Owners may apply for a Mills Act contract and may qualify for property tax relief.
    Applies: Designated landmarks and historic resources in -h Historic Preservation Combining Districts.
    § C17-25 · code text
    Owners of designated landmarks and historic resources located in -h Historic Preservation Combining Districts may make application to the County for a Mills Act contract. Such owners may qualify for property tax relief if they pledge to rehabilitate and maintain the historical and architectural character of the property for a minimum ten-year period.
  • May qualify for the Mills Act.
    Applies: Owner-occupied single-family residences and income-producing commercial properties.
    § C17-25 · code text
    Owner-occupied single-family residences and income-producing commercial properties may qualify for the Mills Act.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What rules apply to a historic home in Santa Clara County?

Santa Clara County's code: 50 years or older to be a landmark; newer ones need time for scholarly perspective or a distinctive style. (County landmark designation.) (§ C17-5); Board approval is required before demolition or removal. (Formally designated or registered cultural heritage resource.) (§ 3.50.070).

General information, not legal advice.

Ask about a specific Santa Clara County property

Ask GoCodebook how Santa Clara County's historic homes rules apply to your situation and get an answer that cites the section.

Ask your question

More on building on your lot in Santa Clara County