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About HPO & HPRB

  • DC's historic preservation program

    Who We Are

    DC's historic preservation program

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  • What’s current in preservation

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    FOIA Requests

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Preservation Services

  • What you need to know

    For Residents

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  • Get information and guidance

    For Business and Government

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  • Get involved in preservation

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Plans and Reports

  • Understand our goals and achievements

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  • Track projects in your community

    Project Reports and Actions

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  • Buildings, history, and archaeology

    Historic Resource Surveys

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Maps and Information

  • Find out about historic properties

    Landmarks and Districts

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  • Explore the city's heritage and culture

    DC History

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  • Understand the preservation process

    Policies and Procedures

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Office of Planning

  • Visit the Office of Planning website

    Office of Planning Home

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Historic Preservation Office


Office Hours
Monday through Friday, 8:30 am to 5:00 pm

How to Reach Us
1100 4th Street, SW, Suite E650
Washington, DC 20024
historic.preservation@dc.gov

Phone: (202) 442-7600
Fax: (202) 442-7638
TTY: 311

FOIA Information
Agency Performance

Website: http://preservation.dc.gov

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Harriet Tregoning, Director, Office of Planning

Harriet Tregoning
Director, Office of Planning
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Design Guidelines


The Historic Preservation Office assists owners and tenants in historic structures to maintain, preserve, and enhance the architectural character of their property. In addition to the Guidelines listed below, HPO has available practical advice and resources for Door Replacement, Masonry Maintenance and Repair, Locating Electric Meter Boxes, Metal Repair, Roof Decks and Roof Additions, and Window Repair and Replacement as two-page Preservation Briefs.
Roofs on Historic Buildings

Roofs on Historic Buildings

The Historic Preservation Office assists owners and tenants in historic structures to maintain, preserve, and enhance the roofs on their property.

 
Walls and Foundations of Historic Buildings

Walls and Foundations of Historic Buildings

The Historic Preservation Office assists owners and tenants in historic structures to maintain, preserve, and enhance the walls and foundations on their property.

 
Window Repair and Replacement: Preservation and Design Guidelines

Window Repair and Replacement: Preservation and Design Guidelines

In October 2011, The Historic Preservation Review Board approved an updated guidance for window repair and replacement for historic structures in the District of Columbia.

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