7405 Helmsdale Rd

Bethesda, MD 20817

$3,250,000
Price
5
Beds
6,336 Sq. Ft.
$513 / Sq. Ft.
6,336
Sq. Ft.
$513
per Sq. Ft.
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NaCL House by David Jameson

Description

A home first experienced as sculpture, provoking curiosity before comprehension. It does not reveal itself immediately, and the closer you look, the more it rewards. Designed by architect David Jameson, recipient of a 2014 Residential Architect Magazine Design Award for this project, the internationally published NaCl House explores geometry, light, projection, and proportion with extraordinary discipline and control. A beautiful object within the landscape, the home avoids the visual heaviness of...A home first experienced as sculpture, provoking curiosity before comprehension. It does not reveal itself immediately, and the closer you look, the more it rewards. Designed by architect David Jameson, recipient of a 2014 Residential Architect Magazine Design Award for this project, the internationally published NaCl House explores geometry, light, projection, and proportion with extraordinary discipline and control. A beautiful object within the landscape, the home avoids the visual heaviness of the typical contemporary build from the very first approach. Despite spanning three finished levels, its gravity-defying massing and dramatic cantilevered forms allow the structure to settle into the site with composure. Deep overhangs and hovering volumes manipulate natural light throughout the day, allowing the home to extend dramatically beyond its original footprint while preserving more of the site. Shadow, compression, openness, and proportion recalibrate constantly through movement within the home. Walls of glass frame the surrounding landscape with restraint and clarity, while rich mahogany millwork and custom cabinetry introduce warmth and material depth. Volumes stretch unexpectedly, openings appear with exact intention, and even transitional spaces feel carefully authored. Four bedrooms are positioned upstairs, including an exceptional primary suite with some of the home's most dramatic architectural moments, from a soaring private sitting room to a shower that opens to the sky. On the main level, two dedicated home offices support focused work and retreat. The lower level includes a family room, guest suite, and elevator access to all three floors. The residence reveals itself gradually through movement, shadow, materiality, and sequence. Widely recognized for its architectural significance, the NaCl House remains one of the region's most compelling modern residences. The result is architecture that remains expressive, rigorous, and remarkably controlled, rewarding its residents with continual moments of discovery.
  1. Listed by Ronald B Mangas Jr. • TTR Sothebys International Realty
    P: (703)-298-2564 rmangas@ttrsir.com

Property Details for 7405 Helmsdale Road

Tax ID Number
160700685740
Ownership
Fee Simple
Condo Coop Association
No
HOA
No
Structure Type
Detached
Style
Contemporary, Mid-Century Modern
Levels/Stories
3
Waterfront
No
LISTING UPDATED: 06/04/2026 11:18 AM

Property Details for 7405 Helmsdale Road

StatusActive
MLS #MDMC2233412
Days on Market29
Taxes$16,785 / year
HOA Fees-
Condo/Co-op Fees-
Property TypeSingle Family
MLS TypeResidential / Fee Simple
Year Built2011
Lot Size0.52 AC / 22,492 SF
CountyMontgomery County
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Location

Listing Courtesy of TTR Sothebys International Realty
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Building Information for 7405 Helmsdale Road

Stories3Year Built2011Building Size-Lot Size0.52 AC / 22,492 SF

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$17,594 per month

30 year fixed, 6.36% Interest

Principal and Interest

$16,195

Property Taxes

$1,399

HOA Dues

$0

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Property Information for 7405 Helmsdale Road

Location
Location
  • In City Limits: No
  • School District Name: MONTGOMERY COUNTY PUBLIC SCHOOLS
  • School District County ID: 121138126809
  • Elementary School: BANNOCKBURN (MONTGOMERY MD)
  • Middle Or Junior School: THOMAS W. PYLE (MONTGOMERY MD)
  • High School: WALT WHITMAN (MONTGOMERY MD)
  • County: MONTGOMERY
Waterfront / Water Access
Waterfront / Water Access
  • Water View: No
  • Water Access: No
  • Water Oriented: No
  • Navigable Water: No
  • Tidal Water: No
  • Riparian Rights Y/N: No
Association / Community Info
Association / Community Info
  • Senior Community: No
Taxes and Assessment
Taxes and Assessment
  • Tax Year: 2026
  • Tax Assessed Value: $1,600,667
  • Year Assessed: 2026
  • County Tax: $15,820
  • Improvement Assessed Value: $1,275,700
  • Land Assessed Value: $777,900
  • Front Foot Fee: $0
  • Front Foot Fee Payment Frequency: Annually
  • Land Use Code: R
  • Refuse Fee: $671
  • Agricultural Tax Due: No
  • Zoning: R200
  • Tax Lot: 6
  • School Tax: $0
  • Tax Page Number: 184
  • Automatically Update Tax Values Y/N: No
Lease Information
Lease Information
  • Pets Allowed: Yes
  • Pet Restrictions: No Pet Restrictions
Rooms
Main
  • # Bedrooms Count Main Level: 0
  • # Bathrooms Count Main Level: 1
  • # Bathrooms Full Main Level: 0
  • # Bathrooms Half Main Level: 1
All Upper Levels
  • # Bedrooms Count All Upper Levels: 4
  • # Bathrooms Count All Upper Levels: 3
  • # Bathrooms Full All Upper Levels: 3
Upper Level 1
  • # Bedrooms Count Upper Level: 4
  • # Bathrooms Count Upper Level: 3
  • # Bathrooms Full Upper Level: 3
All Lower Levels
  • # Bedrooms All Lower Levels: 1
  • # Bathrooms All Lower Levels: 1
  • # Bathrooms Full All Lower Levels: 1
Lower Level 1
  • # Bedrooms Lower Level: 1
  • # Bathrooms Lower Level: 1
  • # Bathrooms Full Lower Level: 1
Rooms
  • Stories: Lower 1, Main, Upper 1
Building Info
Building Info
  • Total Finished SQFT: 6,336.00
  • Total Finished SQFT Source: Assessor
  • Tax Total Finished SQFT: 6,336.00
  • Total SQFT: 6,336.00
  • Total SQFT Source: Assessor
  • Elevators Count: 1
  • Main Entrance Orientation: West
  • Construction Materials: Stucco
  • Roof: Flat, Rubber
  • Ext Main Mid-res: http://bright-media02.prd.brightmls.com/bright/images/0000/8049/1244/1402/804912441402_2048_1536_NgJj_S5dwroLovoj.jpg
  • Wall and Ceiling Types: 2 Story Ceilings, 9'+ Ceilings
  • Flooring Type: Hardwood
  • Basement Type: Fully Finished, Interior Access, Walkout Level, Windows, Garage Access
  • Foundation Details: Other
  • Room and Floor: Bathrooms Half-Main Level-1, Bedrooms-Upper Level 1-1, Bedrooms-Upper Level 1-2, Bedrooms-Upper Level 1-3, Bedrooms-Upper Level 1-4, Bedrooms-Lower Level 1-1, Bathrooms Full-Upper Level 1-1, Bathrooms Full-Upper Level 1-2, Bathrooms Full-Upper Level 1-3, Bathrooms Full-Lower Level 1-1
  • # Bathrooms Full: 4
  • # Bathrooms Half: 1
  • Other Structure: Above Grade, Below Grade
Lot / Land Information
Lot / Land Information
  • Lot Size Source: Estimated
  • Parcel ID: 13877595
  • Ground Rent Exists: No
Parking
Parking
  • Type Of Parking: Attached Garage, Driveway
  • Num of Attached Garage Spaces: 2
  • Total Garage Spaces: 2
  • Garage Features: Garage - Front Entry, Oversized
Interior Features
Interior Features
  • Interior Features: Breakfast Area, Ceiling Fan(s), Elevator, Family Room Off Kitchen, Floor Plan - Open, Kitchen - Gourmet, Kitchen - Island, Primary Bath(s), Recessed Lighting, Walk-in Closet(s), Wood Floors
  • Fireplace: Yes
  • Fireplaces Count: 2
  • Fireplace Features: Gas/Propane, Wood
  • Appliances: Cooktop - Down Draft, Dishwasher, Disposal, Dryer, Oven - Double, Refrigerator, Stainless Steel Appliances, Washer, Water Heater
  • Accessibility Features: 36"+ wide Halls, Elevator
  • Security Features: Electric Alarm
  • Laundry Type: Upper Floor
  • Virtual Tour URL Unbranded: https://youtu.be/w99KQGGhzew?si=J1M0_Ng1MweFxjuD
Exterior Features
Exterior Features
  • Spa: No
  • Exterior Features: Exterior Lighting
  • Outdoor Living Structures: Patio(s)
  • Pool: Yes - Community
Utilities
Utilities
  • Heating: Yes
  • Cooling Type: Central A/C
  • Cooling Fuel: Electric
  • Heating Type: Forced Air
  • Heating Fuel: Natural Gas
  • Hot Water: Natural Gas
  • Water Source: Public
  • Sewer Septic: Public Sewer
Confidential Data
Listing Office
  • List Agent AOR: Northern Virginia Association of REALTORS
  • List Agent URL: www.listmodern.com

Property History for 7405 Helmsdale Road

DateEvent & SourcePriceAppreciation
May 12, 2026

Listed (Active)

BRIGHT #MDMC2233412

$3,250,000—
Dec 31, 2025

Expired

BRIGHT #MDMC2185718

—
Oct 15, 2025

Withdrawn

BRIGHT #MDMC2185718

—
DateEvent & SourcePrice
05/12/2026

Listed (Active)

BRIGHT #MDMC2233412

$3,250,000
12/31/2025

Expired

BRIGHT #MDMC2185718

—
10/15/2025

Withdrawn

BRIGHT #MDMC2185718

—

For completeness, we often displays two records for one sale: the MLS record and the public record.

Public Records for 7405 Helmsdale Road

Taxable ValueLand$776,900Additions$597,300Total$1,374,200
Tax Record2025$16,093 ($1,341 / month)
Home Facts
Beds0Baths4.5Total Finished SqFt4,180 SqFtAbove Grade Finished SqFt3,180 SqFtFinished Basement SqFt1,000 SqFtStories2Lot Size22,492 SqFtStyleSingle Family ResidenceYear Built1960ZoningR200CountyMONTGOMERYAPN07-00685740Fireplace TypeHas Fireplace

Schools near 7405 Helmsdale Road

This home is within Montgomery County Public Schools.
Rating
School
Type
Grades
Distance
Bannockburn Elementary School
Public - K to 5
Thomas W. Pyle Middle School
Public - 6 to 8
Walt Whitman High School
Public - 9 to 12
Stephen Knolls School
Public - PK to 12
Rating
School
Distance
Bannockburn Elementary School
PublicK to 5

Thomas W. Pyle Middle School
Public6 to 8

Walt Whitman High School
Public9 to 12

Stephen Knolls School
PublicPK to 12

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 7405 Helmsdale Road, Bethesda, MD 20817

7405 Helmsdale Road is a single family home for sale in Bethesda, MD 20817. This property was listed for sale on May 12, 2026 by TTR Sothebys International Realty, it's currently listed at $3,250,000. It has been on the market for a total of 29 days and was last sold on August 1, 2007. This listing's school district is Montgomery County Public Schools. Nearby schools include Bannockburn Elementary School, Thomas W. Pyle Middle School and Walt Whitman High School. 7405 Helmsdale Road is a 5-bed, 5-bath, 6,336 sqft single family home built in 2011.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of any information, descriptions or measurements (including square footage measurements and property condition), such should be independently verified through appropriate means, including, but not limited to, in person inspection and public records, and Compass International Holdings, its subsidiaries, affiliates and independently owned and operated franchisees, and their affiliated agents and associated third parties expressly disclaim any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the seller's discretion. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of TTR Sothebys International Realty

© 2026 Bright MLS. All rights reserved. All information is deemed reliable, but accuracy is not guaranteed. Listing information is from various brokers who participate in IDX and not all listings may be visible on the site. The property information being provided is for the consumer’s personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated on 06/04/2026 11:18 AM