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About This Home

This 5-bedroom, 6-bathroom single family at 43044 UNISON KNOLL Circle in ASHBURN, VA is listed for $2,175,000 ($255 per sqft). Built in 2004, the home offers 8,515 sqft of living space on a 0.93 acres lot.

Agent Description

Set on a lush .93-acre homesite, this extraordinary 8,500+ sq. ft. Toll Brothers Henley Federal residence is a masterclass in scale, elegance, and modern refinement. A stately brick facade and beveled glass entry open to a breathtaking two-story foyer, where twin sweeping staircases establish a sense of timeless grandeur.

Every space has been thoughtfully curated-from the formal entertaining rooms with intricate millwork to the sunlit atrium retreat. At the heart of the home, the designer kitchen redefines luxury living, blending quartz surfaces, custom soft-close cabinetry, and a statement island built for gathering.

The adjoining sunroom and expansive deck create a seamless indoor-outdoor experience. The soaring two-story great room, anchored by a dramatic brick fireplace, offers both comfort and architectural impact, while a private library provides a quiet space for work or reflection.

Upstairs, the primary suite is a sanctuary unto itself-complete with a sitting room, an extraordinary 26-foot dressing room, and a spa-caliber bath crafted in porcelain and quartz. Each additional bedroom is a private suite, offering elevated comfort for family and guests alike.

The lower-level transforms into a full-scale entertainment destination, with a rec room, brick, gas fireplace, home theater, bar, finished storage/gym space, 2nd office, and 5th bedroom, full bath and additional guest accommodations. Outdoors, the estate continues to impress with a fully fenced yard, mature fruit trees, professional landscaping, a 7-zone irrigation system and multiple spaces for gathering and relaxation.

With a 3-car garage, EV charging, smart home features, and a premier location near top-tier shopping, dining, and commuter routes, this home delivers an exceptional lifestyle at every turn.

Key Features

  • Built in 2004
  • 0.93 acre lot
  • 3 stories
  • 5 parking spaces
  • Fireplace

Property Details

3 stories
5 full, 1 half
5 spaces
2004

Amenities

EV ChargerFireplaceA/C

Monthly Cost Estimate

$11,828/mo

20% down · 6.5% · 30 years

Principal$1,573
Interest$9,425
Insurance$634
HOA$196

Estimates only. Actual payments may vary.

Location

43044 UNISON KNOLL Circle

ASHBURN, VA 20148

LOUDOUN VALLEY ESTATES

Features & Amenities

Interior Features

Bathroom - Soaking TubBathroom - Stall ShowerBathroom - Tub ShowerCarpetCeiling Fan(s)Chair RailingsCrown MoldingsCurved StaircaseDining AreaFamily Room Off KitchenFloor Plan - TraditionalFormal/Separate Dining RoomKitchen - GourmetKitchen - IslandKitchen - Table SpacePrimary Bath(s)Recessed LightingUpgraded CountertopsWalk-in Closet(s)Wood FloorsWet/Dry BarDouble/Dual Staircase

Property Details

Construction

Masonry

Parking

Garage - AttachedDriveway

Heating

Forced AirZoned

Cooling

Central AirZoned

Questions & Answers

This 5-bedroom, 6-bathroom single family at 43044 UNISON KNOLL Circle is listed at $2,175,000 ($255/sqft). The estimated monthly payment is $9,621 based on 20% down at 6.5% interest.

HOA fees are $196/month.

Key features include: Built in 2004, 0.93 acre lot, 3 stories, 5 parking spaces, Fireplace. Interior Features: Bathroom - Soaking Tub, Bathroom - Stall Shower, Bathroom - Tub Shower.

This property is listed by Ann M Beck and can be reached at 7039321274 or abeck@kw.com.

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AB

Ann M Beck

Agent at Keller Williams Realty

(703) 932-1274

Listed by Keller Williams Realty

MLS# VALO2118914· Source: listhub· Updated 14 days ago

Copyright © 2026 Bright MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

43044 UNISON KNOLL Circle, ASHBURN, VA 20148

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