4400 County Road 123

Round Rock, TX 78664 · Williamson County

$740,000Price
2,025Sq. Ft.
$365/ Sq. Ft.
4400 County Road 123
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Description

Property offers potential for a variety of uses, including possible commercial applications, subject to buyer verification. Versatile property with a metal building. No known restrictions per seller; however, buyer to independently confirm zoning, restrictions, and intended use. Rare 1 acre property featuring a fully updated, taken-to-the-studs, ~$523K remodel on a 1 story home plus an exceptional 900 sqft insulated workshop which includes a 200 sqft office space. ~$523K in upgrades, highly functional residence and workspace. The home includes approx. ~1,825 sq ft of added living area, Hardie siding, new plumbing with insulated Pex, fully replaced HVAC system with variable-speed AC and LP furnace, complete electrical upgrades including 200-amp service to both house and shop, new windows, new interior/exterior doors, new trim, and full flooring replacement (LVP/tile/carpet). Kitchen and baths feature custom cabinetry, new granite countertops, soft-close hardware, and full appliance replacements. New roof, blown-in attic insulation, LED lighting throughout, fireplace rebuild, full laundry/utility room addition, 4th bedroom, privacy fencing, new driveway, sidewalks, + extensive landscape upgrades. The 30’x30’ workshop has insulated walls/roof (closed-cell spray foam), (2) 16’ electric lift insulated doors, 40” soaker sink with water heater, temperature-controlled exhaust system, separate 200-amp service, 30-amp generator plug, dedicated appliance circuits, interior/exterior 220V plugs, conditioned 20’x10’ office with storage, reclaimed-wood exterior accents, and LED interior/exterior lighting, plus a covered trailer/storage bay with gate access. Backyard paradise that backs into the creek. A fully modernized home—in a prime Round Rock location with quick access to toll roads & highways, Samsung, Dell, Amazon, Emerson, etc. **Ask for 3-page upgrade sheet. All information deemed reliable. Buyer to verify all information.

Contact Agent

C
Col Realty
Col Realty
(512) 699-3810

Property Details

StatusActive
MLS #ACT225796638
Taxes$6,860 (2025) / year
TypeCommercial Sale
Year Built1978
Living Area2,025 Sq. Ft.
Lot Size1.00 AC / 43,560 SF
CountyWilliamson
SubdivisionLow Water Crossing On Brushy Creek

Property Information

Parking

Attached

Utilities & Construction

Heat: CentralAC: Central AirCarpet, Tile, VinylFoundation: Slab

Directions: east on HW 79, right on Red Bud, left on CR 123

Location

Property History

DateEventPrice
May 18, 2026 Listed (Active) · MLS# ACT225796638 $740,000
Original List Price $750,000

Full transaction history may not be available. Data sourced from ACTRIS MLS.

Public Records

Tax Record 2025$6,860
Total Sq. Ft.2,025
Year Built1978
Total Sq. Ft.2,025
Lot Size43,560 Sq. Ft.
StyleCommercial Sale
CountyWILLIAMSON
MLS #ACT225796638
$740,000
4400 County Road 123, Round Rock, TX

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Payment Estimate

Estimated monthly payment
Principal & Interest
Property Taxes

For illustrative purposes only. Contact a lender for accurate figures.