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3400 Massachusetts Avenue NWWashington, DC 20007Price: $10,750,000

  • Price: $10,750,000
  • Est. Mortgage of $/month
  • 98 Days on Market
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$
%
$/month over payments
Federal 30-year interest rate: 6.52% last updated on Jun 11, 2026
* All Figures are estimates. Check with your bank or proposed mortgage company for actual interest rates.
This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
  • $10,750,000List Price
  • 7Bedrooms
  • 11Bathrooms
  • 12,200Square Feet
Prominently sited in prestigious Observatory Circle, the historic Heurich-Parks House at 3400 Massachusetts Avenue, NW presents a rare opportunity to own a fully reconstructed Washington estate. Originally built in 1925 by architect Albert S.J. Atkinson and once home to Christian Heurich Jr., a philanthropic businessman, as well as Marshall Parks, known as the "Father of Pediatric Ophthalmology". This distinguished Spanish Mission-style residence was masterfully reconstructed and expanded in 2017 by renowned BarnesVanze Architects, seamlessly blending historic provenance with modern luxury. Set on a beautifully landscaped and level 0.39-acre lot with irrigation, the property is introduced by a grand circular driveway and features a detached 2-car garage with guest house studio above and additional parking pad. Encompassing approximately 13,900 square feet, the residence offers 7 bedrooms, 9 full baths, 2 half baths, and an elevator. The main level is defined by elegant entertaining spaces, complemented by a stunning open kitchen with marble countertops, herringbone floors, and a sunlit breakfast room. Designed for both grand-scale living and everyday comfort, the home includes an extraordinary indoor swimming pool with pool bath, bar, and Desert Air dehumidification system. A convenient main level bedroom suite also completes this level. The luxurious owner's suite features a spa-inspired bath and dual walk-in closets. There are four other bedroom suites on this level. The expansive lower level offers a recreation room, exercise room, wine storage, laundry, full bath with sauna, and multiple storage rooms. A truly exceptional offering combining architectural significance, modern amenities, and premier location adjacent to the Naval Observatory and Vice President's Mansion!
Listed by Robert Hryniewicki of TTR Sotheby's International Realty

Driving Directions

Railey Vacations
Railey Vacations
Office: 301-387-2124
5 Vacation Way
McHenry, MD 21541

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More Info

Location Information

  • Date Listed03/09/2026
  • ZoningRES
  • UsmAreaWashington

Parking

  • Parking TypesDetached Garage, Driveway
  • Total Garage And Parking Spaces12

Basic Information

Property

  • New Construction YNN

Interior

  • Heating YNYes
  • CoolingCentral A/C
  • Basement YNYes

Exterior

  • FoundationSlab, Other

Property Information

  • Lot Size Square Feet17,034
  • Above Grade Unfinished Area950
  • Above Grade Finished Area8900
  • Below Grade Area Total4,050
  • Below Grade Unfinished Area750
  • Below Grade Finished Area3300

Other

  • Other Structures ListGuest House
  • View Count2

Basic Information

  • MLS NumberDCDC2246924
  • Ownership InterestFee Simple
  • List Price$10,750,000
  • Square Feet12,200
  • Acreage0.39
  • Year Built1925
  • MLS Property TypeResidential
  • StatusACT

Location

  • Address3400 Massachusetts Avenue NW
  • Area Total13,900
  • SubdivisionObservatory Circle
  • TownWashington
  • StateDC
  • Zip20007
  • CountyWashington

Utilities

  • Water SourcePublic
  • SewerPublic Sewer
  • Central Air YNYes
  • Cooling FuelElectric
  • Water HeaterNatural Gas
  • Heating FuelNatural Gas
  • Heat SystemHeat Pump(s)

Amenities

  • Pool FeaturesIndoor
  • PoolYes - Personal
  • Accessibility AmenitiesElevator
  • PricePerSqFt1208
  • Other AmenitiesBasement, Fireplace, Pool

Tax Information

  • Total Taxes Payment FrequencyAnnually
  • Tax Total Finished Sq Ft10,557
  • Tax Assessment Amount6543050
  • Tax Year2025
  • Taxes$60,824
  • County Tax Payment FrequencyAnnually
  • Assessment Year2025
  • City Town Tax$60,824

Building

  • Num Detached Garage Spaces2
  • Interior FeaturesElevator, Sauna
  • Security FeaturesElectric Alarm, Exterior Cameras
  • High School DistrictDistrict Of Columbia Public Schools
  • Broker NameTTR Sotheby's International Realty
  • Building Number3400
  • In City Limits YNYes
  • DirectionsBetween Observatory Circle and Edmunds Street
  • Lower Levels Total Baths1
  • Lower Level1 Total Baths1
  • Lower Level1 Full Baths1
  • Lower Levels Total Full Baths1
  • Main Level Total Baths4
  • Main Level Bedrooms1
  • Main Level Half Baths2
  • Main Level Full Baths2
  • Upper Levels Total Full Baths6
  • Upper Levels Total Bedrooms6
  • Upper Levels Total Baths6
  • Upper Level1 Bedrooms6
  • Upper Level1 Full Baths6
  • Upper Level1 Total Baths6
  • Story ListLower 1, Main, Upper 1
  • Structure Design TypeDetached
  • Construction MaterialsBrick
  • Property StyleSpanish
  • Bedrooms7
  • BasementFull, Fully Finished
  • Full Bath9
  • Bathroom11
  • Half Baths2
  • Levels4
  • Fireplace YNYes
  • Fireplace1
  • Elevators1
  • Garage TypeGarage Door Opener
  • Garage Spaces2
  • GarageYes
  • Patio And Porch FeaturesPorch(es), Patio(s)

Copyright 2026 BRIGHT, All Rights Reserved.  Information Deemed Reliable But Not Guaranteed. The data relating to real estate for sale on this website appears in part through the BRIGHT Internet Data Exchange program, a voluntary cooperative exchange of property listing data between licensed real estate brokerage firms in which Railey Vacations participates, and is provided by BRIGHT through a licensing agreement. The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.Data last updated June 15, 2026. Some properties which appear for sale on this website may no longer be available because they are under contract, have Closed or are no longer being offered for sale.

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