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For sale
  • Price cut: $295K (7/11)
    $3,500,000

    7405 Helmsdale Rd, Bethesda, MD 20817

    4beds
    4,180sqft
    : 
    Single Family Residence
    Built in 2011
    0.52 Acres Lot
    $3,323,000 Zestimate®
    $837/sqft
    $-- HOA

    What's special

    Thoughtfully designed living spacesSleek glass railingsLuxurious finishesTranquil half-acre lotMinimalist eleganceWhite stucco volumesExpansive floor-to-ceiling windows
    NEW PRICE 7/11!! Iconic NaCl House – A Modern Architectural Masterpiece Discover the award-winning NaCl House, an architectural gem designed by internationally acclaimed architect David Jameson. Located at 7405 Helmsdale Road in Bethesda, MD, this striking residence was inspired by the natural isometric formation of mineral rock salt. Completed in 2011, the home features a bold, Tetris-like arrangement of white stucco volumes accented with flush-glazed panels, creating a seamless integration of interior and exterior spaces. For the discerning buyer seeking a truly exceptional residence, this award-winning home is a rare opportunity to own a landmark of modern design. Honored with a 2014 Residential Architect Magazine Design Award, the property stands as a testament to modernist ingenuity and visionary craftsmanship. Inside, the approximately 4,860-square-foot residence offers thoughtfully designed living spaces centered around a striking double-height living room. This open and fluid layout invites both grand entertaining and intimate moments. Crisp white walls and light ash floors create a minimalist elegance that perfectly complement the expansive floor-to-ceiling windows and sleek glass railings. These elements flood the interiors with abundant natural light, enhancing the home’s bright and airy ambiance. The careful interplay of space and light reflects the architect’s intention to craft a home that feels both dynamic and serene. Originally built on the foundation of an earlier structure, the home was completely reimagined in 2011, blending modern elegance with structural innovation. Situated on a tranquil half-acre lot, in the sought-after neighborhood Bannockburn Estates in Bethesda, MD, the NaCl House combines architectural splendor with a serene natural setting. This exceptional property features luxurious finishes throughout, including a commanding mahogany front door and elevator, servicing all levels. Owning this iconic property is a rare opportunity to live in a true piece of architectural history - where luxury, design, and lifestyle seamlessly merge.
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    Zillow last checked: 7 hours ago

    Listing updated: July 11, 2025 at 08:13am

    Listed by:

    Wendy Banner 301-365-9090,

    Long & Foster Real Estate, Inc. 240-497-1700,

    Listing Team: Banner Team, Co-Listing Team: Banner Team,Co-Listing Agent: Julia S Fortin 240-603-5760,

    Long & Foster Real Estate, Inc.

    Source: Bright MLS,MLS#: MDMC2185718MLS Logo
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    Next available tour time:Today at 1:30pm

    Facts & features

    Interior

    Bedrooms & bathrooms
    • Bedrooms: 4
    • Bathrooms: 5
    • Full bathrooms: 4
    • 1/2 bathrooms: 1
    • Main level bathrooms: 1
    Basement
    • Area: 2194
    Heating
    • Forced Air, Natural Gas
    Cooling
    • Central Air, Electric
    Appliances
    • Included: Dishwasher, Down Draft, Disposal, Double Oven, Refrigerator, Stainless Steel Appliance(s), Washer, Dryer, Water Heater, Gas Water Heater
    • Laundry: Upper Level
    Features
    • Elevator, Open Floorplan, Kitchen Island, Primary Bath(s), Ceiling Fan(s), Recessed Lighting, Walk-In Closet(s), Breakfast Area, Family Room Off Kitchen, Kitchen - Gourmet, 2 Story Ceilings, 9'+ Ceilings
    • Flooring: Hardwood, Wood
    • Basement: Garage Access,Windows,Partial
    • Number of fireplaces: 2
    • Fireplace features: Gas/Propane, Wood Burning
    Interior area
    • Total structure area: 5,374
    • Total interior livable area: 4,180 sqft
    • Finished area above ground: 3,180
    • Finished area below ground: 1,000
    Video & virtual tour

    Property

    Parking
    • Total spaces: 2
    • Parking features: Garage Faces Front, Oversized, Attached, Driveway
    • Attached garage spaces: 2
    • Has uncovered spaces: Yes
    Accessibility
    • Accessibility features: Accessible Hallway(s), Accessible Elevator Installed
    Features
    • Levels: Three
    • Stories: 3
    • Patio & porch: Patio
    • Exterior features: Lighting
    • Pool features: Community
    • Has view: Yes
    • View description: Garden
    Lot
    • Size: 0.52 Acres
    Details
    • Additional structures: Above Grade, Below Grade
    • Parcel number: 160700685740
    • Zoning: R200
    • Special conditions: Standard

    Construction

    Type & style
    • Home type: SingleFamily
    • Architectural style: Contemporary
    • Property subtype: Single Family Residence
    Materials
    • Stucco
    • Foundation: Other
    Condition
    • Excellent
    • New construction: No
    • Year built: 2011

    Utilities & green energy

    • Sewer: Public Sewer
    • Water: Public

    Community & HOA

    Community
    • Subdivision: Bannockburn Estates
    HOA
    • Has HOA: No
    Location
    • Region: Bethesda

    Financial & listing details

    • Price per square foot: $837/sqft
    • Tax assessed value: $1,374,200
    • Annual tax amount: $15,385
    • Date on market: 6/17/2025
    • Listing agreement: Exclusive Right To Sell
    • Ownership: Fee Simple
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