Williamson County property record for 4357 Co Rd 123, Round Rock, TX 78664
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 2,520 sqft · built 1982 |
| Lot Size | 2.21 acres (96,268 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $1,656 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | R-14-0422-0022-3 |
| Primary APN | R-14-0422-0022-3 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 2,520 sqft Living Area |
| 1st Floor Area | 2,520 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1982 |
| Exterior Material | Combination |
| Lot Area | 96,268 sqft |
| Garage Type | Carport |
| Garage Area | 864 sqft |
| Carport | Carport |
| Carport Area | 864 sqft |
| Parking Spaces | 3 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 540 sqft |
| Utility Building | 384 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R14042200223 |
|---|---|
| Street Address | 4357 COUNTY ROAD 123 |
| City | ROUND ROCK |
| State | TX |
| Zip | 78664-9769 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | AW0422 MCNUTT, R. SUR., ACRES 2.21 |
| Legal Subdivision | MCNUTT, R. SUR. |
| Legal Block | 1 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | TAYLOR |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 20814 |
4357 Co Rd 123 is owned and occupied by two individuals.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4357 COUNTY ROAD 123, ROUND ROCK, TX 78664-9769 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4357 Co Rd 123 was $1,656 with a homeowner's exemption.
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Williamson County |
| Unified School District | Hutto Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $1,656.00 Homeowner's exemption Senior Citizen's exemption | $582,702 | $628,290 Land $390,644 Building $237,646 |
| 2023 | $2,042.00 (-50.21%) Homeowner's exemption Senior Citizen's exemption | $599,449 Land $325,009 Building $274,440 | $599,449 Land $325,009 Building $274,440 |
| 2022 | $4,101.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4357 Co Rd 123 in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective October 5, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 16 policies |
| Nearby Flood Policies | 16 in force |
| Nearby Flood Claims | 2 (2015) |
| Most Recent Claim | May 2015 · Severe Storms, Tornadoes, Straight-line Winds And Flooding |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 4357 Co Rd 123 is moderate, ranking above 46% of the US, with a 0.07% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 46% of the US · lower than 80% of Texas |
|---|---|
| Wildfire Likelihood | 0.07% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 73 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Hotwire Communications.
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