- 3 beds
- 3 baths
- 2,768 sqft
- $252 per sqft
- 2020 build
Welcome to 43179 Mongold Sq in sought-after Loudoun Valley, Ashburn—a rare opportunity to own the coveted Delanie model penthouse end unit, where luxury meets lifestyle. With 3 bedrooms, 2.5 baths, a dedicated office, and an expansive rooftop terrace, this home is a masterpiece of style, comfort, and convenience. The upgraded modern design package sets a sophisticated tone throughout the home. Enjoy engineered hardwood oak floors, brushed satin nickel finishes, and premium Kohler fixtures. The gourmet kitchen is truly a chef’s dream, featuring a 30” smart wall oven/microwave combo, 36” gas cooktop with canopy vent hood, quartz countertops, and a large island perfect for entertaining. The main level also offers a spacious dining area, walk-in pantry, elegant powder room, and a bright home office with a custom built-in desk. The living room opens to a private balcony, adding even more natural light to the open-concept layout. Upstairs, the luxurious owner’s suite impresses with double walk-in closets and a spa-inspired en suite bath. Two additional bedrooms, a second full bath, laundry room, and a cozy loft-style sitting area round out the upper floor. Head one level up to your private rooftop terrace—ideal for hosting guests or enjoying quiet evenings under the stars. Every detail was thoughtfully curated, including $15,000 in custom window treatments, professional tinting, high-end carpeting, and a 20-inch Big Gray whole-house carbon filtration system for purified water throughout. Living in Loudoun Valley means access to resort-style amenities—pools, parks, a clubhouse, fitness center, and scenic trails. You’re minutes from Dulles Airport, the Ashburn Metro, Route 7, and the Dulles Greenway. Plus, shopping, dining, and entertainment are right around the corner. This is more than a home—it’s a lifestyle upgrade. Schedule your private tour today!
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Last updated Jun 21, 2025
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MLS# VALO2095334 —
The Building
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Year Built:2020
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Year Built Source:Assessor
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Roof:Flat, Other
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New Construction:No
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Construction Materials:Masonry
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Builder Name:Toll Brothers
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Builder Model:Delanie
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Building Levels:5
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Unit Building Type:Garden 1 - 4 Floors
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Structure Type:Penthouse Unit/Flat/Apartment
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Architectural Style:Contemporary
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Levels:3
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Entry Floor Number:1
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Window Features:Energy Efficient, Double Pane, Screens
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Accessibility Features:None
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Basement:No
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Total SqFt Source:Assessor
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Total Below Grade SqFt Source:Assessor
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Above Grade Finished Area Units:Square Feet
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Above Grade Finished SqFt:2768
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Above Grade Finished SqFt Source:Assessor
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Below Grade Finished Area Units:Square Feet
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Below Grade Unfinished Area Units:Square Feet
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Below Grade Finished SqFt Source:Assessor
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Below Grade Unfinished SqFt Source:Assessor
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Tax Total Finished SqFt:2768
Interior
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Room List:Living Room, Dining Room, Sitting Room, Kitchen, Laundry, Other, Office
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Floors In Unit:3
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Fireplace:No
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Living Area SqFt Source:Assessor
Room Dimensions
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Total SqFt:2768
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Living Area SqFt:2,768 Sqft
Financial & Terms
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Sale Type:Standard
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Possession:0-30 Days CD
Location
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Directions:GPS to 43179 Mongold Sq, Ashburn, VA 20148-6314
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Latitude:38.96555000
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Longitude:-77.50881000
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Location Type:Suburban
The Property
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Property Type:Residential
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Zoning:PDH4
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View:Panoramic, Trees/Woods, Other
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In City Limits:No
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Other Structures:Above Grade, Below Grade
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Waterview:No
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Waterfront:No
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Water Oriented:No
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Water Access:No
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Navigable Water:No
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Tidal Water:No
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Riparian Rights:No
Listing Agent
- Contact info:
- Agent phone:
- (571) 499-2727
- Office phone:
- (703) 378-8810
Taxes
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Tax ID Number:123168013016
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Tax Year:2024
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Tax Annual Amount:$5,417
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Tax Assessed Value:$653,320
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Total Taxes Payment Frequency:Annually
Beds
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Bedrooms:3
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Upper Level Bedrooms:3
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Upper Level 1 Bedrooms:3
Baths
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Total Baths:3
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Full Baths:2
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Half Baths:1
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Main Level Baths:1.00
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Main Level Half Baths:1
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Upper Level Full Baths:2
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Upper Level Total Baths:2
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Upper Level Total Baths:2.00
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Upper Level Full Baths:2
Heating & Cooling
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Cooling Type:Central A/C
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Central Air:Yes
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Cooling Fuel:Electric
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Heating:Yes
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Heating Type:Forced Air
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Heating Fuel:Natural Gas
Utilities
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Sewer/Septic:Public Septic
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Hot Water:Natural Gas
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Water Source:Public
Appliances
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Appliances:Built-In Microwave, Cooktop, Dishwasher, Disposal, Dryer, Energy Efficient Appliances, ENERGY STAR Clothes Washer, ENERGY STAR Dishwasher, ENERGY STAR Refrigerator, Oven - Double, Range Hood, Water Heater
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Laundry Type:Has Laundry, Upper Floor, Dryer In Unit, Washer In Unit
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Washer/Dryer/Hook Up in Unit:Yes
Schools
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High School:ROCK RIDGE
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School District Name:Loudoun County Public Schools
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School District Source:Listing Agent
The Community
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Subdivision Name:Loudoun Valley Carlisle
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Senior Community:No
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Pool:Yes - Community
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HOA:Yes
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Condo/Coop Association:Yes
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HOA/Condo/Coop Amenities:Basketball Courts, Bike Trail, Common Grounds, Community Center, Pool - Outdoor, Other, Tot Lots/Playground
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HOA Fee:$98
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HOA Fee Frequency:Monthly
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Condo/Coop Fee:$150
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Condo/Coop Fee Frequency:Monthly
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HOA/Condo/Coop Fee:All Ground Fee, Common Area Maintenance, Ext Bldg Maint, Lawn Care Front, Lawn Maintenance, Management, Pool(s), Reserve Funds, Snow Removal, Taxes, Other
Parking
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Total Garage and Parking Spaces:1
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Garage:Yes
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Garage Features:Garage - Rear Entry, Garage Door Opener, Inside Access
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Garage Spaces:1.00
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Type of Parking:Attached Garage, Driveway, On Street
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Parking Features:Paved Driveway, Unassigned
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# of Attached Garage Spaces:1
Extra Units
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Vacation Rental:No
Monthly cost estimate

Asking price
$698,000
Expense | Monthly cost |
---|---|
Mortgage
This calculator is intended for planning and education purposes only. It relies on assumptions and information provided by you regarding your goals, expectations and financial situation, and should not be used as your sole source of information. The output of the tool is not a loan offer or solicitation, nor is it financial or legal advice. |
$3,737
|
Taxes | $451 |
Insurance | $191 |
HOA fees | $150 |
Utilities | $136 See report |
Total | $4,665/mo.* |
*This is an estimate |
Walk Score®
Provided by WalkScore® Inc.
Walk Score is the most well-known measure of walkability for any address. It is based on the distance to a variety of nearby services and pedestrian friendliness. Walk Scores range from 0 (Car-Dependent) to 100 (Walker’s Paradise).
Bike Score®
Provided by WalkScore® Inc.
Bike Score evaluates a location's bikeability. It is calculated by measuring bike infrastructure, hills, destinations and road connectivity, and the number of bike commuters. Bike Scores range from 0 (Somewhat Bikeable) to 100 (Biker’s Paradise).
Soundscore™
Provided by HowLoud
Soundscore is an overall score that accounts for traffic, airport activity, and local sources. A Soundscore rating is a number between 50 (very loud) and 100 (very quiet).
Air Pollution Index
Provided by ClearlyEnergy
The air pollution index is calculated by county or urban area using the past three years data. The index ranks the county or urban area on a scale of 0 (best) - 100 (worst) across the United Sates.
Sale history
Date | Event | Source | Price | % Change |
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5/7/25
May 7, 2025
|
Listed / Active | BRIGHT | $698,000 |