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Keenan Group#1 Austin Board of Realtors Team 2024
4400 County Road 123, photo 1 of 40, Round Rock, Round Rock, TX
Active

$700,000

0Beds
1.00 acresLot

4400 County Road 123, Round Rock, TX 78664

Reduced 7%$750,000
Round Rock·MLS# 7862691·Built 1978·194 days on market

— bed, — bath on 1.00 acres in Round Rock. Round Rock, TX 78664. $700,000.

About This Home

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.

Property Type
Commercial Sale
Year Built
1978
Lot Size
1.00 acres

Listing information last updated October 12, 2026.

Listed by Keller Williams Realty Lone Star

MLS# 7862691 • Active

IDX inquiries: Keenan Group at Compass · (512) 415-7653

Highlights

Generous 1.00-acre lot
Versatile property with a metal building
~$523K in upgrades, highly functional residence and workspace
The home includes approx
Backyard paradise that backs into the creek
**Ask for 3-page upgrade sheet

Facts & Features

Interior

Flooring

  • Carpet
  • Tile
  • Vinyl
Heating
Central
Cooling
Central Air
Exterior & Lot

Construction

  • Brick Veneer
  • Masonry – Partial

Foundation

  • Slab
Lot Size
1.00 Acres

Parking

  • Attached
Financial
Original List Price
$750,000
Utilities
  • Electricity Available
  • Propane
Water Source
Public
Sewer
Septic Tank

Transaction History

2 records on file

Every recorded listing, sale, and lease at 4400 County Road 123, whoever represented it.

  1. ActiveListed 2026
    Current price: $700,000Original list: $750,000MLS 7862691
    1. Listed · April 10, 2026$750,000
    2. Price changed · May 20, 2026$740,000
    3. Price changed · July 3, 2026$725,000
    4. Price changed · September 16, 2026$700,000
  2. ActiveListed 2025
    Current price: $700,000Original list: $800,000MLS 3238865
    1. Price changed · December 9, 2025$800,000
    2. Price changed · February 4, 2026$750,000
    3. Price changed · May 13, 2026$740,000
    4. Price changed · July 3, 2026$725,000
    5. Price changed · September 16, 2026$700,000

Prices shown are list prices. Closed sale prices are available to registered clients in accordance with ACTRIS rules.

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Price & Listing History

Listing timeline with current price, original ask, and market time.

View Timeline
Current list
$700,000
Original list
$750,000
Price movement
$50K reduction
Listed / DOM
Apr 10, 2026 · 194 days

Tax Record

Public record data from county appraisal records. Market value can differ from assessed value.

Assessed Value
$389,979
Assessment Year
2025
Parcel ID
R-14-1420-0003
$429K
$390K
$389,979
2025
$428,977
+10.0% from prev
2026
YearTaxesTotal AssessmentLandAdditions
2026+10.0%
—$428,977$260,000$306,719
2025
—$389,979$227,650$212,566
5-Year Change10.0%
Map showing 4400 County Road 123
4400 County Road 123
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20% ($140K)

Adjustable assumption - not a lending recommendation.

$700,000

Loan: $560K
Mortgage rate%
Payoff: ~2056
No mortgage rate is assumed
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Keenan Market Position

A sourced read on Round Rock pricing, timing, and property scale. No automated valuation claim.

List price

$700,000

Price per sqft

Not available

Vs. Neighborhood guide reference price

Not available

Days on market

194 days

Original to current

$50K reduction

$750K original

Active inventory context

Ask for current inventory

Source: MLS Grid / Unlock MLS and Keenan Group review as of Oct 16, 2026.

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Frequently Asked Questions

How much is 4400 County Road 123?

4400 County Road 123 is listed at $700,000 with 0 bedrooms, 1.00-acre lot. This places it above the ZIP 78664 single-family closed-sale median price of $350,000 (ZIP 78664 geography · single-family closed sales · median sale price · trailing 12 months as of Oct 21, 2026).

What are the property details for 4400 County Road 123?

4400 County Road 123 is a Commercial Sale built in 1978 featuring 0 bedrooms, 1.00-acre lot.

What are the property taxes for 4400 County Road 123?

The most recent annual property tax for 4400 County Road 123 is $6,860. Texas has no state income tax, so property taxes are a primary revenue source. Rates vary by jurisdiction and exemptions. Verify current amounts with the county appraisal district.

How should a buyer estimate the monthly payment for 4400 County Road 123?

This page does not assume a mortgage rate or publish a monthly payment for 4400 County Road 123. A property-specific estimate requires a current lender rate, chosen down payment, taxes, insurance, and any verified association dues.

How does 4400 County Road 123 compare with other homes in Round Rock?

As of Oct 16, 2026, 4400 County Road 123 is offered at $700,000. The current MLS snapshot shows 167 active listings in 78664. Keenan Group has completed 9 verified transactions in 78664 within its 1,000+ completed transactions and $1B+ career volume across Austin.

When was 4400 County Road 123 built?

4400 County Road 123 was built in 1978 (48 years ago). Buyers should budget for potential updates to major systems.

Answers use visible listing facts, school context, and neighborhood data available on this page. Verify time-sensitive details before making decisions.

Why Choose the #1 Austin Board Team for Round Rock

#1 ABoR Team 20241,000+ Career SalesCompass Luxury Collection Specialist

#1 Austin Board of Realtors Team. 1,000+ homes sold and $1B+ in career sales over 25+ years in Austin.

25+ years advising buyers and sellers in this community

Unlock MLSMLS GRID

Listing courtesy of Unlock MLS as distributed by MLS GRID. Information deemed reliable but not guaranteed. Neither the listing broker nor Compass RE Texas, LLC shall be responsible for any typographical errors, misinformation, or misprints.

IDX information is provided exclusively 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. The data is deemed reliable but is not guaranteed by MLS GRID. Use of MLS GRID data may be subject to an end user license agreement prescribed by the applicable MLS, as amended from time to time.

Based on information submitted to MLS GRID as of 10/16/2026, 12:07:24 AM. All data is obtained from various sources and may not have been verified by 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.

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Last updated: 10/16/2026, 12:07:24 AM

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