Data Source Brokerage:

    Continental Real Estate Group, Inc logo

    Continental Real Estate Group, Inc

    3400 Prospect St NW # 3410, Washington, DC 20007

    $29,500,000

    Not Currently Listed

    5 beds
    9 baths
    30,000 sq ft
    Built in 1787

    Purchase price

    Down payment

    Estimated rent

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    Listed By: Mark McFadden, SP99650, Compass

    Source: Bright MLS, #DCDC2242506, last updated on 1/26/2026

    About this property

    Extraordinary Halcyon House! Over 30,000 square feet in this historically designated mansion overlooking the Potomac River. Sited on a dominant 1/2-acre hill. Once owned and expanded by Mark Twain's nephew. Masterful restoration-pristine condition. Most appropriate for either a single family or a...

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    Neighborhood

    10 / 10

    Hyde-Addison Elementary School

    6 / 10

    Hardy Middle School

    2 / 10

    MacArthur High School

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    Property type

    Single family home

    Price per square foot

    $983

    Lot size

    22,173 sq ft

    HOA fees

    -

    Neighborhood score

    4 / 5

    School score

    6 / 10

    Crime score

    3 / 10