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For sale
    • Price cut: $50.1K (10/30)
    $749,900

    520 N St SW Unit S430 & S429, Washington, DC 20374

    2beds
    1,667sqft
    : 
    $6,569/mo
    Get pre-qualified
    Condominium
    Built in 1966
    -- sqft lot
    $-- Zestimate®
    $450/sqft
    $2,275/mo HOA

    What's special

    Surrounding waterfront settingFlexible floor planIn-unit washer and dryerFresh paintLush award-winning gardensExpansive countersWaterfall shower
    Two original units combined into one expansive home. A rare private terrace, balconies stretching along the entire length of the residence, and the space to spread out. This two-bedroom, two-bath home at Harbour Square brings together a flexible floor plan, indoor-outdoor living, and all-inclusive cooperative convenience in the heart of Southwest Washington. Five sets of floor-to-ceiling sliding glass doors fill the home with natural light and provide seamless connection to the outdoors. A welcoming entry foyer with a large hall closet opens into the expansive living and dining spaces, with generous proportions reflecting the home’s combined floor plan. Renovated in 2023 and refreshed in 2026, the home features fresh paint, new luxury designer LVP flooring in the main living areas and second bedroom, and a streamlined kitchen with ample cabinetry, expansive counters, and a full suite of smart appliances. The primary suite offers a private balcony, a custom walk-in closet with room for an office or sitting area, and a spa-inspired en-suite bath with heated floors, a waterfall shower, and smart features. A second bedroom, second full bath, and in-unit washer and dryer complete the interior. Outdoor living is a defining feature, with a substantial terrace opening directly from the living room and additional balconies accessed from the living room, dining room, and bedrooms. Together, the terrace and balconies provide ample room for dining, entertaining, gardening, and enjoying the surrounding Waterfront setting. Designed by renowned Washington architect Chloethiel Woodard Smith, Harbour Square is a landmark of mid-century modern architecture set across six landscaped acres along the Washington Channel. Residents enjoy 24-hour gatehouse security, a renovated heated indoor pool, a state-of-the-art fitness center with river views, rooftop decks with panoramic views of the water and city skyline, and lush, award-winning gardens, as well as a library, meeting spaces, and a large party room. Garage and covered parking ($165/month), bike storage, and EV charging are available on-site. Pets are welcome. The all-inclusive monthly cooperative fee of $2,542.42 covers property taxes, all utilities (electricity, gas, water, trash and recycling), Xfinity cable, high-speed internet, operating costs, and capital reserves. Just two blocks from Waterfront Metro and steps to The Wharf’s dining and entertainment, #S430 & #S429 at Harbour Square offers the best of Southwest Waterfront on a larger scale.
    29 days
    90
    4

    Zillow last checked:

    Listing updated:

    Listed by:

    Joseph Himali 202-669-4656,

    RLAH @properties,

    Co-Listing Agent: Sierra Kim 210-705-3936,

    RLAH @properties

    Source: Bright MLS,MLS#: DCDC2287008MLS Logo

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 2
      • Bathrooms: 2
      • Full bathrooms: 2
      • Main level bathrooms: 2
      • Main level bedrooms: 2
      Rooms
      • Room types: Living Room, Dining Room, Primary Bedroom, Bedroom 2, Kitchen, Foyer, Bathroom 2, Bonus Room, Primary Bathroom
      Primary bedroom
      • Features: Flooring - Carpet, Balcony Access, Lighting - Ceiling, Ceiling Fan(s), Walk-In Closet(s)
      • Level: Main
      • Area: 304 Square Feet
      • Dimensions: 16 X 19
      Bedroom 2
      • Features: Flooring - Luxury Vinyl Plank, Balcony Access, Lighting - Wall sconces
      • Level: Main
      • Area: 135 Square Feet
      • Dimensions: 9 X 15
      Primary bathroom
      • Features: Flooring - Ceramic Tile, Bathroom - Walk-In Shower, Countertop(s) - Quartz, Recessed Lighting
      • Level: Main
      • Area: 55 Square Feet
      • Dimensions: 5 X 11
      Bathroom 2
      • Features: Flooring - Ceramic Tile, Bathroom - Walk-In Shower, Granite Counters, Recessed Lighting, Lighting - Wall sconces
      • Level: Main
      • Area: 55 Square Feet
      • Dimensions: 5 X 11
      Bonus room
      • Features: Flooring - Carpet, Built-in Features, Recessed Lighting
      • Level: Main
      • Area: 200 Square Feet
      • Dimensions: 10 X 20
      Dining room
      • Features: Flooring - Luxury Vinyl Plank, Balcony Access, Crown Molding, Lighting - Pendants
      • Level: Main
      • Area: 168 Square Feet
      • Dimensions: 12 X 14
      Foyer
      • Features: Flooring - Luxury Vinyl Plank, Crown Molding, Lighting - Ceiling
      • Level: Main
      • Area: 96 Square Feet
      • Dimensions: 8 X 12
      Kitchen
      • Features: Flooring - Ceramic Tile, Countertop(s) - Quartz, Kitchen - Electric Cooking, Recessed Lighting
      • Level: Main
      • Area: 152 Square Feet
      • Dimensions: 8 X 19
      Living room
      • Features: Flooring - Luxury Vinyl Plank, Balcony Access, Crown Molding, Fireplace - Electric, Recessed Lighting
      • Level: Main
      • Area: 306 Square Feet
      • Dimensions: 17 X 18
      Heating
      • Forced Air, Electric
      Cooling
      • Central Air, Electric
      Appliances
      • Included: Cooktop, Dishwasher, Disposal, Dryer, Washer, Washer/Dryer Stacked, Energy Efficient Appliances, Ice Maker, Microwave, Double Oven, Oven, Range Hood, Refrigerator, Stainless Steel Appliance(s), Electric Water Heater
      • Laundry: Has Laundry, Dryer In Unit, Washer In Unit, In Unit
      Features
      • Bathroom - Walk-In Shower, Built-in Features, Ceiling Fan(s), Combination Dining/Living, Crown Molding, Dining Area, Elevator, Open Floorplan, Kitchen - Galley, Primary Bath(s), Recessed Lighting, Upgraded Countertops, Walk-In Closet(s)
      • Flooring: Luxury Vinyl, Carpet, Ceramic Tile
      • Doors: Sliding Glass
      • Has basement: No
      • Number of fireplaces: 1
      • Fireplace features: Electric
      • Common walls with other units/homes: 1 Common Wall
      Interior area
      • Total structure area: 1,667
      • Total interior livable area: 1,667 sqft
      • Finished area above ground: 1,667

      Property

      Parking
      • Parking features: On-site - Rent, On Street, Parking Lot
      • Has uncovered spaces: Yes
      Accessibility
      • Accessibility features: Accessible Elevator Installed
      Features
      • Levels: One
      • Stories: 1
      • Patio & porch: Terrace, Roof Deck
      • Exterior features: Barbecue, Extensive Hardscape, Lighting, Storage, Sidewalks, Street Lights, Water Fountains, Balcony
      • Pool features: Community
      • Has view: Yes
      • View description: Marina, River, City
      • Has water view: Yes
      • Water view: Marina,River
      • Waterfront features: River
      • Body of water: Washington Channel
      Lot
      • Features: Landscaped, Urban, Urban Land Not Rated
      Details
      • Additional structures: Above Grade
      • Parcel number: 0503//0116
      • Zoning: R-3
      • Zoning description: Residential
      • Special conditions: Standard
      • Other equipment: None

      Construction

      Type & style
      • Home type: Cooperative
      • Architectural style: Mid-Century Modern,Contemporary
      • Property subtype: Condominium
      • Attached to another structure: Yes
      Materials
      • Concrete, Stone
      • Foundation: Pillar/Post/Pier
      Condition
      • Excellent
      • New construction: No
      • Year built: 1966
      Details
      • Builder model: MCM 2 bed, 2 bath with terrace
      • Builder name: John McShain, Inc.

      Utilities & green energy

      • Electric: Circuit Breakers
      • Sewer: Public Sewer
      • Water: Public
      • Utilities for property: Cable Connected, Underground Utilities, Fiber Optic

      Community & HOA

      Community
      • Features: Pool
      • Security: 24 Hour Security, Carbon Monoxide Detector(s), Desk in Lobby, Exterior Cameras, Fire Alarm, Monitored, Security Gate, Smoke Detector(s)
      • Condo and coop fee: $2,275 monthly
      • Subdivision: Rla (sw)
      HOA
      • Has HOA: No
      • Amenities included: Common Grounds, Concierge, Elevator(s), Fitness Center, Library, Meeting Room, Party Room, Picnic Area, Indoor Pool, Reserved/Assigned Parking, Security, Storage Bin
      • Services included: Air Conditioning, Broadband, Cable TV, Common Area Maintenance, Electricity, Maintenance Structure, Fiber Optics at Dwelling, Gas, Heat, Internet, Insurance, Maintenance Grounds, Management, Pest Control, Pool(s), Reserve Funds, Security, Sewer, Snow Removal, Taxes, Trash, Water
      • HOA name: Harbour Square Owners, Inc.
      Location
      • Region: Washington

      Financial & listing details

      • Price per square foot: $450/sqft
      • Tax assessed value: $1
      • Annual tax amount: $3,208
      • Date on market: 10/8/2026
      • Listing agreement: Exclusive Right To Sell
      • Listing terms: Cash,Conventional
      • Inclusions: N / A
      • Exclusions: N / A
      • Ownership: Cooperative
      • Road surface type: Paved

        Estimated market value

        Not available

        Estimated sales range

        Not available

        $3,133/mo

        Price history

        DateEventPrice
        10/30/2026Price change$749,900-6.3%$450/sqft
        Source: Bright MLS #DCDC2287008 Report a problem
        10/8/2026Listed for sale$800,000$480/sqft
        Source: Bright MLS #DCDC2287008 Report a problem

        Public tax history

        Tax history is unavailable.

        Monthly payment

        Est. payment

        Payment breakdown

        Explore the cost of this home by adjusting the details. Changes won't be saved.
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
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        Climate risks

        Neighborhood: Southwest Waterfront

        Getting around

        84 / 100
        Very Walkable
        92 / 100
        Biker's Paradise

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: Amidon-bowen
        • Middle: Jefferson Middle School Academy
        • High: Eastern
        • District: District Of Columbia Public Schools

        Source: Bright MLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

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