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.
For sale
Price cut: $295K (7/11)
$3,500,000
7405 Helmsdale Rd, Bethesda, MD 20817
4beds
4,180sqft
Est.:
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
- 30 days
- on Zillow |
- 1,392 |
- 91 |
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#: MDMC2185718

Travel times
Tour with a buyer's agent
Tour with a buyer's agent
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
- Loading
- Loading