3400 Massachusetts Avenue NW Washington, DC $ 10,750,000
3400 Massachusetts Avenue NW
$ 10,750,000
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3400 Massachusetts Avenue NW

Washington, DC, 20007
$ 10,750,000
Bedrooms7 Baths9.2 Sq 12,200

Monthly Estimate*

$ 66,190

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Single Family Home for sale in Washington, DC

for $10,750,000 with 7 bedrooms and 9 full baths, 2 half baths. This 12,200 square foot home was built in 1925 on a lot size of 0.39.

Prominently sited in prestigious Observatory Circle, the historic Heurich-Parks House at3400 Massachusetts Ave, NWpresents 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 in2017 with designs 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. 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 9-foot ceilings and 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 31 x 12 swimming pool with pool bath, bar, and Desert Air dehumidification system. A convenient main level bedroom suite also completes this level. The luxurious owners 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!

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Single Family Active

Price

$ 10,750,000

Bedrooms

7

Full Bath

9

Half Bath

2

Property Type

Single Family

Taxes

$ 60,824

Style

Spanish

Lot Size

0.39

Year Built

1925

Town/City

Washington

County/Region

District of Columbia

MLS | Web ID

DCDC2246924

Features
General
Living Area 12200
Sewer Public Sewer
Heating Heat Pump(s)
Cooling Central A/C
Possession Settlement
Zoning RES
Garage Spaces 2.00
Patio/Porch Features Porch(es) Patio(s)
Architectural Style Spanish
Pool Features Indoor
Security Features Electric Alarm Exterior Cameras
Construction Materials Brick
School District DISTRICT OF COLUMBIA PUBLIC SCHOOLS
Year Built 1925
Levels 4
Tax Year 2025
Ownership Fee Simple
Cool Fuel Electric
Accessibility Elevator
County WASHINGTON
New Construction N
Property Type Residential
HOA N
Subdivision Name OBSERVATORY CIRCLE
Garage Y/N Y
Water Access Y/N N
Other Structures Above Grade Below Grade
Full Baths 9
Status ACTIVE
Directions Between Observatory Circle and Edmunds Street
City WASHINGTON
Senior Community Y/N N
Lot Size Units Square Feet
Lot Size Square Feet 17034.00
Tax Annual Amount 60824.0
Structure Type Detached
Condo/Coop Association fee Y/N N
Bathrooms Full Main Level 2
Bathrooms Count Main Level 4.00
Price Per Sq Ft Total AG 1207.87
Vacation Rental Y/N N
Virtual Tour https://www.relahq.com/mls/200145261
Standard Status Active
Year Built Source Estimated
Legal Subdivision Observatory Circle
Tax Lot 36
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Interior
Interior Amenities Elevator Sauna
Heating Fuel Natural Gas
Basement Full Fully Finished
Total Fireplaces 1
Hot Water Natural Gas
Basement (Y/N) Y
Heating Y/N Y
Fireplace Y/N Y
Above Grade Finished Area 8900
Half Baths 2
Central Air Y/N Y
Total Bedrooms 7
Below Grade Finished Area 3300
Main Level Bedrooms 1
Below Grade Finished Area Unit Type Square Feet
Below Grade Finished Area Source Estimated
Above Grade Finished Area Source Estimated
Above Grade Finished Area Unit Type Square Feet
Total Baths 11
Number of Elevators 1
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Exterior
Pool Yes - Personal
Water Source Public
Garage Features Garage Door Opener
Type of Parking Detached Garage Driveway
Foundation Details Slab Other
Water View Y/N N
Lot Size Acres 0.39
Lot Size Source Assessor
Waterfront Y/N N
Soil Types Urban Land-Sassafras-Chillum
Land Assessed Value 1924330.00
Navigable Water Y/N N
Water Oriented Y/N N
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Internal Only
Street Number 1 3400
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* Excluded Features
List By
Ttr Sotheby's International Realty

Broker

hrls@hrlspartners.com

Email

Affordability Calculator

$71,258
Per Month
93%
7%
0%
Monthly Principal & Interest
$66,190
Monthly Property Taxes
$5,069
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
3533234 Elementary School
3533273 Middle School
Unknown High School High School
Pricing History
DatePricePrice ChangeDescription
3/9/2026$10,750,000 Listed Price

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3400 Massachusetts Avenue NW, Washington, DC, 20007 is a Single Family Home for sale at $10,750,000 with 12,200 sqft and a lot size of 0.39. 3400 Massachusetts Avenue NW has 7 bedrooms, 9.2 baths, and was built in 1925. The property's zip code is 20007 which is in Washington, DC