Date
Details
Price
Change
Source
8/04/2026
Listed
$3,250,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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$3,250,000
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Property Description
Introducing 9421 Thornberry Lane, a privately gated modern neo-classical estate by COZIE, offering 7,610 square feet of newly constructed luxury in Midway Hollow. Set on an expansive lot and framed by mature oak trees, the residence pairs a refined stucco exterior and steel framed windows with marble flooring, intricate crown molding, custom millwork and statement designer lighting throughout. A dramatic double height foyer with a sculptural curved staircase opens to the soaring great room, formal kitchen and inviting family living area. Designed for elevated entertaining, the home features a Sub-Zero, Wolf and Cove appliance package, oversized island, full catering scullery, walk-in pantry, bar and wine cellar. Three primary-quality suites-including two on the first floor-create exceptional multi-generational flexibility. The owner's retreat includes a 14 foot recessed ceiling, fireplace, patio deck access, spa bath with a fully marble clad shower and a walk through closet with private laundry. Additional highlights include five ensuite bedrooms, a paneled study, dedicated home theater, game room, flex space, whole home audio system, three fireplaces, a second floor balcony, three car garage and built in outdoor kitchen. The expansive backyard offers exceptional space for a future pool, cabana and sports court. A rare opportunity to own a thoughtfully designed COZIE estate blending classical elegance, modern function and enduring luxury.
Full Property Details
Full Property Details for 9421 Thornberry Ln
General
- Price: $3,250,000
- Taxes: $11,523
- Status: Active
- Type: Single Family
- Source: NTREIS
- MLS ID: 21350337
- Updated: 8/4/2026
- Added to Site: 17 day(s) ago
Interior
- Interior Features: Built-in Features, Chandelier, Decorative/Designer Lighting Fixtures, Double Vanity, Eat-in Kitchen, High Speed Internet, Pantry, Walk-In Closet(s)
- Fireplace: Yes
- Number of Fireplaces: 3
- Fireplace(s): Electric, Gas
- Appliances: Built-In Refrigerator, Dishwasher, Disposal, Gas Range, Microwave, Vented Exhaust Fan, Wine Cooler
- Flooring: Hardwood, Marble
Rooms
Bathrooms
- Total Bathrooms: 7
- Full Bathrooms: 5
- Half Bathrooms: 2
Bedrooms
- Total Bedrooms: 5
Exterior
- Exterior Features: Built-in Barbecue, Balcony, Barbecue
- Porch/Patio/Deck: Balcony
Parking
- Garage: Yes
- Attached garage: Yes
- Garage Spaces: 3
- Covered Spaces: 3
- Parking Features: Driveway, Garage, Tandem
Location
- County: Dallas
- Subdivision: Northwest Heights
- Driving Directions: From NWHWY, turn North onto Thornberry, drive down street; house is on your left.
School Information
- Elem School District: Dallas ISD
- Midd School District: Dallas ISD
- High School District: Dallas ISD
- Elementary School: Walnuthill
- Middle School: Medrano
- High School: Jefferson
Heating & Cooling
- Central air: Yes
- Air Conditioning: Yes
- Cooling Type: Central Air
- Heating Type: Central
Utilities
- Sewer: Public Sewer
- Water: Public
- Utility Description: Sewer Available, Water Available
Structural Information
- Property Detached: Yes
- Architectural Style: Contemporary/Modern, Detached
- Structure Type: House
- Detached/Attached: Detached
- Construction: Stucco
- Roof: Composition
- Stories/Levels: 2
- Living Area: 7,610 Sq. Ft.
- Year Built: 2026
Lot Features
- Lot Size (Acres): 0.334
- Lot Size (Sq. Ft.): 14,549.04
Financial Considerations
- For Sale/Rent/Lease: For Sale
- Tax Amount: $11,523
- Terms: Cash, Conventional
Disclosures and Reports
- Legal Description: NORTHWEST HEIGHTS BLK 10/5085 LT 8
- Property ID: 359026000000
- Block: 10508
- Lot Number: 8
Listed by Christie's Lone Star, Piper Young and Christie's Lone Star, Elizabeth Tormoehlen
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Listing agents
— 9421 Thornberry Ln —
Piper Young
Christie's Lone Star
Elizabeth Tormoehlen
Christie's Lone Star
NMLS#: 1598647Get Pre-Approved Today
Schools
Schools serving 9421 Thornberry Ln
School District:Dallas Independent School District
| Name | Grades | Distance |
|---|---|---|
Walnut Hill International Leadership Academy 10115 Midway Road, Dallas, TX 75229 | K-8 | 1.4 mi |
Francisco Medrano Middle School 9815 Brockbank Drive, Dallas, TX 75220 | 7-8 | 1.8 mi |
Thomas Jefferson High School 4001 Walnut Hill Lane, Dallas, TX 75229 | 9-12 | 1.2 mi |
Disclaimer:
School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 9421 Thornberry Ln
Tax History
Tax History for 9421 Thornberry Ln
Year
Property Taxes
Change
Tax Assessment
Change
2025
$11,523
—
$1,205,250
133%
2025
$11,523
6%
$517,500
10%
2024
$10,820
—
$471,500
—
2023
$10,820
-21%
$471,500
-13%
2022
$13,648
19%
$543,670
25%
2021
$11,488
4%
$435,470
7%
2020
$11,091
7%
$408,830
7%
2019
$10,410
-4%
$380,830
—
2018
$10,836
5%
$380,830
—
2017
$10,356
17%
$380,830
17%
2016
$8,816
10%
$324,220
11%
2015
$8,006
26%
$291,980
26%
2014
$6,335
9%
$231,790
8%
2013
$5,827
—
$214,010
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 9421 Thornberry Ln
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- Single Family
- Active
- Updated 3 days ago
- 5Beds
- 10Total Baths
- Single Family
- Active
- Updated 1 day ago
- 4Beds
- 4Total Baths
- Single Family
- Active
- Updated 11 hours ago
- 4Beds
- 5Total Baths
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- Single Family
- Active
- Updated 4 days ago
- 5Beds
- 6Total Baths
9421 Thornberry Lane, Dallas, TX 75220 (MLS# 21350337) is a Single Family property with 5 bedrooms, 5 full bathrooms and 2 partial bathrooms. 9421 Thornberry Lane is currently listed for $3,250,000 and was received on August 04, 2026. Want to learn more about 9421 Thornberry Lane? Do you have questions about finding other Single Family real estate for sale in Dallas? You can browse all Dallas real estate or contact a Coldwell Banker agent to request more information.