4400 COUNTY ROAD 123, ROUND ROCK, TX 78664
Homes for sale in Round Rock.
Homes for sale in 78664.
List Price$740,000
4400 County Road 123
Round Rock, TX 78664
Listing #3238865
4
Bedrooms
2 full
Bathrooms
2,025
Square Feet
House
Type
About This Property
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
Virtual Tour
Property Features
Location Information
County
Williamson
Subdivision
Low Water Crossing On Brushy Creek
County
Williamson
Directions
east on HW 79, right on Red Bud, left on CR 123
Area
HU
Interior Features
Interior
Kitchen Island, Main Level Primary, Open Floorplan, Stone Counters, Vaulted Ceiling(s), Walk-In Closet(s)
Heating
Central
Primary Bedroom On Main
Yes
Floors
Carpet, Tile, Vinyl
Full Baths
2
Laundry
Main Level, Laundry Room
Has Fireplace
Yes
Disabled Features
None
Number of Fireplaces
1
Appliances
Dishwasher, Gas Cooktop, Microwave, Oven
Fireplace Description
Family Room
Accessibility
None
Exterior Features
Style
Brick Veneer, Masonry
Garage Spaces
2
Stories
1
Fencing
None
Is New Construction
No
Lot Size in Acres
1
Construction/Exterior
Brick Veneer, Masonry
Water Body
Brushy Creek
Exterior
None
Waterfront Description
Creek, See Remarks, Waterfront
Foundation
Slab
Has Waterfront
Yes
Possession
Closing & Funding
Has View
Yes
Water / Sewer
Septic Tank
View
City
Water
Public
Is One Story
Yes
Parking Description
Attached
School
Elementary School District
Hutto ISD
Middle School
Hutto
Elementary School
Hutto
High School
Hutto
Additional Information
Roof/Attic
Composition
APN
1414200003
Other Utilities
Electricity Available, Propane
Status
Active
Property Type
SFR
Documents Available
See Remarks
Property SubType
Single Family Residence
Square Feet Source
Public Records
Year Built
1978
Similar Listings
Mortgage Calculator
$3,454
per month
30 Year Fixed. 3.52% Interest Rate.
Principal + Interest
$2,666
Monthly Tax
$616
Monthly Insurance
$172
yrs
%
$
$
Based on a fully amortized fixed rate loan. Ask your agent for the tax rates in your area. Insurance estimate is based on an average cost, your final premium cost will be determined by the type of coverage you select. This program only provides an estimate.
Schools
Walk Score
Listing Courtesy of: Keller Williams Realty Lone Star (512) 994-0247
© 2026 Austin Board of REALTORS® (ACTRIS). All rights reserved.
Listings courtesy of APPLICABLE MLS as distributed by MLSGRID. Based on information submitted to the MLS GRID as of 2026. All data is obtained from various sources and may not have been verified by the broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. All information provided is deemed reliable but is not guaranteed and should be independently verified. The Austin Board of REALTORS® ACTRIS and their affiliates provide the MLS and all content therein " AS IS" and without any warranty, express or implied. The information being provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Based on information from ACTRIS through the date and time shown below.
Unlock MLS data last updated at June 12, 2026, 4:48 AM CT
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