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SetbackIQ

Historic districts in Montgomery County, MD

On a Master Plan historic site or in a historic district, exterior changes need a Historic Area Work Permit from the Historic Preservation Commission. SetbackIQ checks the county's historic preservation map.

A person last checked these rules on October 20, 2026. This is guidance only, so confirm with Montgomery County before you build.

The details

  • DPS lists exterior work on a historic property as permit work.High confidence

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SetbackIQ reads the zoning, flood zone, historic district, and environmental maps for your lot. Then it applies these rules.

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Common questions

What changes in a historic district in Montgomery County?
On a Master Plan historic site or in a historic district, exterior changes need a Historic Area Work Permit from the Historic Preservation Commission. SetbackIQ checks the county's historic preservation map.

Sources

  1. Montgomery County DPS, Permits Required / No Permits Required (2024). Checked 2026-10-21
    [Likely requires a permit:] Accessory Structure; Deck; Driveway (apron only); Electrical Work; Exterior Work on Historic Property; Fence; Garage; Hot Tub; HVAC Heating (replacing); Land Disturbance (greater than 5,000 square feet or 100 cubic yards or more …
  2. Montgomery Planning, Historic Area Work Permits. Checked 2026-10-21
    Work requiring a HAWP includes but is not limited to the following: [new construction, additions, removing porches and other exterior work on Master Plan historic sites and properties in Master Plan historic districts, reviewed by the Historic Preservation …

Disclaimer: This is general information, not legal or professional advice for any one property. Codes change. SetbackIQ is not a zoning determination, a permit, or a survey, and it does not replace an architect, engineer, or lawyer. Confirm with your building and zoning offices before you build, buy, or sign a contract.