Williamson County property record for 4021 Castle Crk, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 3,036 sqft · built 1998 |
| Lot Size | 0.195 acres (8,506 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $238,900 (Nov 2012) |
| Tax Bill | $4,501 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | R17W349903BD012 |
| Primary APN | R17W349903BD012 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 3,036 sqft Living Area |
| Gross Area | 3,192 sqft |
| 1st Floor Area | 3,036 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1998 |
|---|---|
| Effective Year Built | Effective 1998 |
| Exterior Material | Brick Veneer |
| Roof Type | Hip |
| Lot Area | 8,506 sqft (0.195 acres) |
| Garage Area | 620 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Screened Porch |
|---|---|
| Porch Area | 234 sqft |
| Deck Area | 204 sqft |
| Patio Area | 320 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R17W349903BD012 |
|---|---|
| Street Address | 4021 CASTLE CRK |
| City | ROUND ROCK |
| State | TX |
| Zip | 78681-1038 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S5968 - VISTA OAKS SEC 3 B, BLOCK D, LOT 12 |
| Legal Subdivision | VISTA OAKS SEC 3 B |
| Legal Block | D |
| Legal Lot Number | 12 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 2 |
| Census Block | 2009 |
| Census Tract | 20604 |
4021 Castle Crk is owned and occupied by two individuals who bought it in November 2012.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4021 CASTLE CRK, ROUND ROCK, TX 78681-1038 |
| 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 |
|---|---|
| Last Sale | Nov 9, 2012 · Amount on File |
| Deed Sale | Nov 9, 2012 · Amount on File |
| Deed Document Number | 201293684 |
| Prior Transfer Date | Oct 31, 2012 |
| Prior Transfer Doc | 0000093684 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4021 Castle Crk was $4,501 with exemptions applied.
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Williamson County |
| Unified School District | Leander Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $4,501.00 Homeowner's exemption Disabled Person's exemption | $529,119 Land $94,000 Building $435,119 | $529,119 Land $94,000 Building $435,119 |
| 2023 | $5,086.00 (-26.45%) Homeowner's exemption Disabled Person's exemption | $573,619 Land $109,000 Building $464,619 | $573,619 Land $109,000 Building $464,619 |
| 2022 | $6,915.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4021 Castle Crk in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 5, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 2 (2004–2010) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Sep 2010 · rainfall accumulation |
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 4021 Castle Crk is low, with a 0.03% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 67% of the US · lower than 91% of Texas |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | VISTA OAKS MUD serves 2,724 people · EPA ID TX2460139 |
|---|---|
| Water Source | Purchased surface water from CITY OF ROUND ROCK |
| Last State Inspection | Dec 2023 |
| Lead | 2 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 212 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Western Broadband.
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