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4400 County Road 123, Round Rock, TX 78664
4400 County Road 123, Round Rock, TX 78664 3D Tour
4400 County Road 123, Round Rock, TX 78664 Explore 3D Tour
4400 County Road 123, Round Rock, TX 78664
4400 County Road 123, Round Rock, TX 78664
4400 County Road 123, Round Rock, TX 78664
4400 County Road 123, Round Rock, TX 78664

4400 County Road 123 Round Rock, TX 78664

$740,000

ACTIVE
Beds
4
Baths
2
Sqft
2,025
Acres
1
Year
1978
Days on Site
1
Property Type
Residential
Sub Type
Single Family
Per Square Foot
$365
Date Listed
Dec 8, 2025

Description of 4400 County Road 123, Round Rock, TX 78664

Listing details for 4400 County Road 123, Round Rock, TX 78664 : 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. Properties offering this combination of land, full remodel quality, and a modern shop setup are extremely limited in this area. The ~$523K in upgrades completed deliver a turnkey, 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 (KitchenAid double oven, microwave, dishwasher, 36” gas cooktop, GE exhaust vent). More improvements include new dimensional roof, blown-in attic insulation, LED lighting throughout, fireplace rebuild, full laundry/utility room addition, new 4th bedroom, privacy fencing, new driveway, sidewalks, + extensive landscape upgrades. The 30’x30’ workshop is a major highlight with 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. A covered trailer/storage bay with gate access adds even more utility. All with a backyard paradise that backs into the creek. Ideal for owners needing land, shop space, functionality, and 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
Listing Updated : 06-12-2026 at 8:59 AM CDT
Listing Provided By

Robert Fischer, (512) 994-0247, [email protected], Keller Williams Realty Lone Star

Source

Unlock MLS, MLS#: ACT3238865

Property History

DateEventPrice
12/8/2025
Listed for sale
$800,000
$395/sqft
Source:Unlock MLS #ACT3238865
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