$349,000

400 O STREET SW #402, WASHINGTON, DC, 20024

  • 777sq ft
  • 1Beds
  • 1 Bathrooms
  • Active

Key Details

April 07, 2026
Year Built: 1965
Days on Market: 87
DCDC2253566
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Description

A rare offering in the sought-after 400 building - the only unit currently available and a true penthouse residence that elevates both your lifestyle and your investment. Positioned at the top, this penthouse delivers what buyers are searching for but rarely find: privacy, natural light, and a sense of exclusivity that simply doesn't exist on lower levels. With no competing inventory in the building, this is a unique chance to secure a premier unit in a tightly held community. Inside, the home offers a thoughtfully designed layout that maximizes space, light, and functionality - ideal for both everyday living and entertaining. Elevated sightlines and top-floor positioning create a quiet retreat above it all, while still keeping you connected to everything happening around you. Location is where this property truly shines. Situated in Southwest DC, you're moments from: --The Wharf - dining, waterfront views, entertainment, and nightlife --Navy Yard - home to Nationals Park, parks, and a rapidly growing restaurant scene --Capitol Riverfront & Audi Field - one of DC's most active lifestyle corridors --Easy access to Metro, commuter routes, and downtown DC This location continues to benefit from ongoing public and private investment, making it not just a place to live - but a smart long-term play. Ai has been used to show the condo as a blank canvas experience.

Listing Courtesy of: Keller Williams Capital Properties

Location

Features

  • Days on market: 87
  • Elementary School: AMIDON-BOWEN
  • List Date: April 07, 2026
  • Subdivision: WATERFRONT
  • County: WASHINGTON
  • Year Built: 1965
  • Middle School: JEFFERSON MIDDLE SCHOOL ACADEMY
  • Bathrooms: 1 full , 0 half
  • Property Type: Condominium
  • Total taxes: 3,420
  • Listing ID: DCDC2253566
  • High School: WILSON SENIOR
  • Architecture Style: Dwelling w/Separate Living Area, Unit/Flat

Schools

These schools are filtering within the property address as determined by our data provider.

Rating Name Type Level Grades Address
NA Private Elementary PK-7 2422 K St NW, Washington, DC20037

Grade Span: PK - 7

Admission: Private

Address: 2422 K St NW, Washington, DC20037

Phone: 202-495-0507

Teachers: 6

Students: 20

Ratio: 3:1 Students/Teacher

Gender: 45% Male / 55% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-6 2700 27th St NW, Washington, DC20008

Grade Span: PK - 6

Admission: Private

Address: 2700 27th St NW, Washington, DC20008

Phone: 202-387-2700

Teachers: 11

Students: 71

Ratio: 7:1 Students/Teacher

Gender: 49% Male / 51% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-8 3825 Klingle Pl NW, Washington, DC20016

Grade Span: PK - 8

Admission: Private

Address: 3825 Klingle Pl NW, Washington, DC20016

Phone: 202-460-9076

Website: http://www.annunciationschool.net/

Teachers: 21

Students: 121

Ratio: 6:1 Students/Teacher

Gender: 60% Male / 40% Female

Student/Teacher ratio

Enrollment
NA Private Secondary 9-12 4300 Harewood Rd NE, Washington, DC20017

Grade Span: 9 - 12

Admission: Private

Address: 4300 Harewood Rd NE, Washington, DC20017

Phone: 202-529-0900

Teachers: 27

Students: 383

Ratio: 14:1 Students/Teacher

Gender: 57% Male / 43% Female

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary 1-11 1600 Jonquil St NW, Washington, DC20012

Grade Span: 1 - 11

Admission: Private

Address: 1600 Jonquil St NW, Washington, DC20012

Phone: 301-593-4343

Teachers: 4

Students: 21

Ratio: 5:1 Students/Teacher

Gender: 67% Male / 33% Female

Student/Teacher ratio

Enrollment
NA Private Elementary KG-5 1801 Mississippi Ave SE, Washington, DC20020

Grade Span: KG - 5

Admission: Private

Address: 1801 Mississippi Ave SE, Washington, DC20020

Phone: 202-678-1515

Teachers: 10

Students: 71

Ratio: 7:1 Students/Teacher

Gender: 100% Male

Student/Teacher ratio

Enrollment
NA Private Elementary KG-5 1801 Mississippi Ave SE, Washington, DC20020

Grade Span: KG - 5

Admission: Private

Address: 1801 Mississippi Ave SE, Washington, DC20020

Phone: 202-678-1515

Teachers: 6

Students: 83

Ratio: 14:1 Students/Teacher

Gender: 100% Male

Student/Teacher ratio

Enrollment
NA Private Elementary KG-8 5841 Chevy Chase Pkwy NW, Washington, DC20015

Grade Span: KG - 8

Admission: Private

Address: 5841 Chevy Chase Pkwy NW, Washington, DC20015

Phone: 202-966-6682

Teachers: 39

Students: 508

Ratio: 13:1 Students/Teacher

Gender: 49% Male / 51% Female

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary PK-12 2001 Wisconsin Ave NW, Washington, DC20007

Grade Span: PK - 12

Admission: Private

Address: 2001 Wisconsin Ave NW, Washington, DC20007

Phone: 202-829-3700

Teachers: 44

Students: 478

Ratio: 11:1 Students/Teacher

Gender: 46% Male / 54% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-KG 5608 Broad Branch Rd NW, Washington, DC20015

Grade Span: PK - KG

Admission: Private

Address: 5608 Broad Branch Rd NW, Washington, DC20015

Phone: 202-232-2233

Teachers: 2

Students: 2

Ratio: 1:1 Students/Teacher

Gender: 50% Male / 50% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-8 210 S Carolina Ave SE, Washington, DC20003

Grade Span: PK - 8

Admission: Private

Address: 210 S Carolina Ave SE, Washington, DC20003

Phone: 202-355-4498

Website: http://www.chds.org/

Teachers: 35

Students: 203

Ratio: 6:1 Students/Teacher

Gender: 54% Male / 46% Female

Student/Teacher ratio

Enrollment
NA Private Elementary 2-6 725 8th St SE, Washington, DC20003

Grade Span: 2 - 6

Admission: Private

Address: 725 8th St SE, Washington, DC20003

Phone: 202-878-6917

Teachers: 3

Students: 12

Ratio: 5:1 Students/Teacher

Gender: 67% Male / 33% Female

Student/Teacher ratio

Enrollment
NA Private Elementary KG-6 201 Allison St NW Ste B, Washington, DC20011

Grade Span: KG - 6

Admission: Private

Address: 201 Allison St NW Ste B, Washington, DC20011

Phone: 202-722-1520

Website: http://www.cfmschool.org/

Teachers: 12

Students: 104

Ratio: 9:1 Students/Teacher

Gender: 48% Male / 52% Female

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary KG-12 3742 Ely Pl SE, Washington, DC20019

Grade Span: KG - 12

Admission: Private

Address: 3742 Ely Pl SE, Washington, DC20019

Phone: 202-575-0027

Teachers: 18

Students: 160

Ratio: 9:1 Students/Teacher

Gender: 48% Male / 52% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-KG 301 A St SE, Washington, DC20003

Grade Span: PK - KG

Admission: Private

Address: 301 A St SE, Washington, DC20003

Phone: 202-294-4799

Teachers: 2

Students: 4

Ratio: 2:1 Students/Teacher

Gender: 50% Male / 50% Female

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary 6-12 4101 Connecticut Ave NW, Washington, DC20008

Grade Span: 6 - 12

Admission: Private

Address: 4101 Connecticut Ave NW, Washington, DC20008

Phone: 202-362-8882

Teachers: 44

Students: 333

Ratio: 8:1 Students/Teacher

Gender: 45% Male / 55% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-1 4473 Connecticut Ave NW, Washington, DC20008

Grade Span: PK - 1

Admission: Private

Address: 4473 Connecticut Ave NW, Washington, DC20008

Phone: 202-966-7747

Website: http://www.franklinmontessori.com/

Teachers: 4

Students: 8

Ratio: 2:1 Students/Teacher

Gender: 100% Male

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary 6-12 2000 Florida Ave NW, Washington, DC20009

Grade Span: 6 - 12

Admission: Private

Address: 2000 Florida Ave NW, Washington, DC20009

Phone: 202-244-0639

Teachers: 15

Students: 42

Ratio: 3:1 Students/Teacher

Gender: 67% Male / 33% Female

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary PK-12 4200 Davenport St NW, Washington, DC20016

Grade Span: PK - 12

Admission: Private

Address: 4200 Davenport St NW, Washington, DC20016

Phone: 202-295-6127

Teachers: 149

Students: 1053

Ratio: 7:1 Students/Teacher

Gender: 47% Male / 53% Female

Student/Teacher ratio

Enrollment
NA Private Elementary PK-KG 1041 Wisconsin Ave NW, Washington, DC20007

Grade Span: PK - KG

Admission: Private

Address: 1041 Wisconsin Ave NW, Washington, DC20007

Phone: 202-337-8058

Teachers: 1

Students: 3

Ratio: 3:1 Students/Teacher

Gender: 67% Male / 33% Female

Student/Teacher ratio

Enrollment
NA Private Secondary 9-12 1524 35th St NW, Washington, DC20007

Grade Span: 9 - 12

Admission: Private

Address: 1524 35th St NW, Washington, DC20007

Phone: 202-337-3350

Website: http://www.visi.org/

Teachers: 46

Students: 509

Ratio: 11:1 Students/Teacher

Gender: / 100% Female

Student/Teacher ratio

Enrollment
NA Private Secondary 9-12 19 I St NW, Washington, DC20001

Grade Span: 9 - 12

Admission: Private

Address: 19 I St NW, Washington, DC20001

Phone: 202-336-7100

Website: http://www.gonzaga.org/

Teachers: 68

Students: 956

Ratio: 14:1 Students/Teacher

Gender: 100% Male

Student/Teacher ratio

Enrollment
NA Private Elementary PK-8 1325 36th St NW, Washington, DC20007

Grade Span: PK - 8

Admission: Private

Address: 1325 36th St NW, Washington, DC20007

Phone: 202-337-2339

Teachers: 32

Students: 314

Ratio: 10:1 Students/Teacher

Gender: 47% Male / 53% Female

Student/Teacher ratio

Enrollment
NA Private Secondary 9-12 801 Buchanan St NE, Washington, DC20017

Grade Span: 9 - 12

Admission: Private

Address: 801 Buchanan St NE, Washington, DC20017

Phone: 202-281-2700

Teachers: 7

Students: 44

Ratio: 6:1 Students/Teacher

Gender: 61% Male / 39% Female

Student/Teacher ratio

Enrollment
NA Private Combined Elementary/Secondary 6-12 4301 Harewood Rd NE, Washington, DC20017

Grade Span: 6 - 12

Admission: Private

Address: 4301 Harewood Rd NE, Washington, DC20017

Phone: 202-424-3780

Website: http://www.kirovacademydc.org/

Teachers: 11

Students: 77

Ratio: 7:1 Students/Teacher

Gender: 21% Male / 79% Female

Student/Teacher ratio

Enrollment

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