Williamson County property record for 3912 Sapphire Loop, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 2.5 ba · 2,974 sqft · built 2008 |
| Lot Size | 0.175 acres (7,617 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $320,600 (Mar 2010) |
| Tax Bill | $11,544 (2025) |
| Deeds & Mortgages | Feb 2021 Mortgage Aug 2019 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R17W334609A0025 |
| Primary APN | R17W334609A0025 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 2,974 sqft Living Area |
| 1st Floor Area | 2,521 sqft |
| 2nd Floor Area | 453 sqft |
| Flooring | Tile |
| Interior Walls | Wallboard/Drywall |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2008 |
|---|---|
| Effective Year Built | Effective 2008 |
| Exterior Material | Brick Veneer |
| Roof Material | Other |
| Lot Area | 7,617 sqft (0.175 acres) |
| Garage Area | 462 sqft |
| Parking Spaces | 2 Parking Spaces |
| Pool Area | 314 sqft |
| Porch | Open Porch |
| Porch Area | 185 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R17W334609A0025 |
|---|---|
| Street Address | 3912 SAPPHIRE LOOP |
| City | ROUND ROCK |
| State | TX |
| Zip | 78681-2429 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | SF2 |
| Legal Description | S9099 - MAYFIELD RANCH SEC 9, BLOCK A, LOT 25 |
| Legal Subdivision | MAYFIELD RANCH SEC 9 |
| Legal Block | A |
| Legal Lot Number | 25 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 20609 |
Source: Williamson County records, as of September 11, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 3912 SAPPHIRE LOOP, ROUND ROCK, TX 78681-2429 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Feb 8, 2021 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Aug 22, 2019 | Deed of Trust, Mortgage · Stand-Alone First Mortgage FIRST UNITED BANK & TRUST CO |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 31, 2010 · Amount on Record |
| Deed Sale | Mar 31, 2010 · Amount on Record |
| Prior Sale | Jun 5, 2007 |
| Deed Document Number | 201019619 |
| Prior Transfer Date | Jan 8, 2010 |
| Prior Transfer Doc | 0000019619 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Property Address | 3912 SAPPHIRE LOOP, ROUND ROCK, TX 78681-2429 |
| Transaction Type | Mortgage |
| Record Updated | Feb 19, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0000019767 |
|---|---|
| Date | Feb 8, 2021 |
| Instrument | 2021019767 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | PONTIAC, MI 48341 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Mar 1, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Property Address | 3912 SAPPHIRE LOOP, ROUND ROCK, TX 78681-2429 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | LAWYERS TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000078237 |
|---|---|
| Date | Aug 22, 2019 |
| Instrument | 2019078237 |
| Name | FIRST UNITED BANK & TRUST CO |
|---|---|
| Type | Bank |
| Address | DURANT, OK 74701 |
| Type | Stand-Alone First Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 241 Months |
| Due | Sep 1, 2039 |
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Williamson County |
| Municipality | Round Rock City |
| Unified School District | Leander Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $11,544.00 (+21.01%) Homeowner's exemption | $603,157 (-9.72%) Land $113,000 Building $490,157 | $603,157 (-9.72%) Land $113,000 Building $490,157 |
| 2023 | $9,540.00 (-4.57%) Homeowner's exemption | $668,112 Land $132,000 Building $536,112 | $668,112 Land $132,000 Building $536,112 |
| 2022 | $9,997.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 3 in force |
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.
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 | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | CITY OF ROUND ROCK serves 130,662 people · EPA ID TX2460003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Sep 2023 |
| Lead | 5 ppb (2021–2023) 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 537 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Spectrum Fiber · Cable in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| Western Broadband Fixed Wireless | 200 / 40 |
| T-Mobile Fixed Wireless | 100 / 20 |
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