3400-3410 Prospect St Nw, Washington, DC 20007

Local realty services provided by:Better Homes and Gardens Real Estate Community Realty
3400-3410 Prospect St Nw,Washington, DC 20007
$29,500,000
  • 5 Beds
  • 9 Baths
  • 30,000 sq. ft.
  • Single family
  • Active
Listed by: mark d mcfadden, cameron h mcfadden
Office: compass
MLS#:DCDC2242506
Source:BRIGHTMLS

Price summary

  • Price:$29,500,000
  • Price per sq. ft.:$983.33

About this home

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 qualified non-profit group. *REGISTRATION FORM REQUIRED

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Home facts

  • Year built:1787
  • Listing ID #:DCDC2242506
  • Added:1 day(s) ago
  • Updated:January 23, 2026 at 03:30 AM

Rooms and interior

  • Bedrooms:5
  • Total bathrooms:9
  • Full bathrooms:9
  • Living area:30,000 sq. ft.

Heating and cooling

  • Cooling:Central A/C
  • Heating:Forced Air, Natural Gas

Structure and exterior

  • Roof:Slate
  • Year built:1787
  • Building area:30,000 sq. ft.
  • Lot area:0.51 Acres

Schools

  • High school:WILSON SENIOR
  • Middle school:HARDY
  • Elementary school:HYDE-ADDISON

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$29,500,000
  • Price per sq. ft.:$983.33
  • Tax amount:$202,530 (2025)

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