Bexar County property record for 18031 Keystone Bluff, San Antonio, TX 78258
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 3,395 sqft · built 2000 |
| Lot Size | 0.212 acres (9,240 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $7,042 (2025) |
| Deeds & Mortgages | Feb 2026 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 17617-006-0020 |
| Primary APN | 17617-006-0020 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 3,395 sqft Living Area |
| 1st Floor Area | 1,767 sqft |
| 2nd Floor Area | 1,628 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2000 |
|---|---|
| Effective Year Built | Effective 2000 |
| Architectural Style | Contemporary |
| Exterior Material | Combination |
| Foundation Type | Slab (Mat/Raft) |
| Roof Material | Asphalt |
| Lot Area | 9,240 sqft (0.212 acres) |
| Garage Type | Detached |
| Garage Area | 546 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
|---|---|
| Porch Area | 164 sqft |
| Deck Area | 90 sqft |
| Patio Area | 335 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Street Address | 18031 KEYSTONE BLF |
|---|---|
| City | SAN ANTONIO |
| State | TX |
| Zip | 78258-3434 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | NCB 17617 BLK 6 LOT 2 THE GLEN AT STONE OAK UT-1 |
| Legal Subdivision | CONV A/S CODE |
| Legal Block | 6 |
| Legal Lot Number | 2 |
| Jurisdiction | BEXAR TX |
| Township / Civil Division | SAN ANTONIO NORTH |
| Census Block Group | 3 |
| Census Block | 3012 |
| Census Tract | 191819 |
18031 Keystone Bluff is owned and occupied by an individual who acquired it in May 2011.
Source: Bexar County records, as of September 28, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 18031 KEYSTONE BLF, SAN ANTONIO, TX 78258-3434 |
| 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 | Name on Deed |
|---|---|
| Last Sale | May 31, 2011 |
| Deed Sale | May 31, 2011 |
| Prior Sale | Apr 1, 2003 · Amount on File |
| Deed Document Number | 201192628 |
| Deed Book / Page | 14981 / 2485 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BEXAR TX |
| Property Address | 18031 KEYSTONE BLF, SAN ANTONIO, TX 78258-3434 |
| Transaction Type | Mortgage |
| Record Updated | Feb 13, 2026 |
| Name | Verified Name |
|---|
| Document Number | 0000018595 |
|---|---|
| Date | Feb 2, 2026 |
| Instrument | 20260018595 |
| Name | RANDOLPH BROOKS FCU |
|---|---|
| Type | Credit Union |
| Address | UNIVERSAL CITY, TX 78148 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Term | 300 Months |
| Due | Feb 1, 2051 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 18031 Keystone Bluff was $7,042 with exemptions applied, down 11.2% from the year before.
Source: Bexar County assessment roll, as of May 26, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Bexar County |
| Municipality | San Antonio City |
| Unified School District | North East Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $7,042.00 (-11.2%) Homeowner's exemption Senior Citizen's exemption | $533,030 Land $96,100 Building $436,930 | $533,030 Land $96,100 Building $436,930 |
| 2024 | $7,930.00 (-3.82%) | ||
| 2023 | $8,245.00 (-8.23%) Homeowner's exemption | $504,100 Land $96,100 Building $408,000 | $504,100 Land $96,100 Building $408,000 |
| 2022 | $8,984.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 18031 Keystone Bluff in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 18031 Keystone Bluff has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 | SAN ANTONIO WATER SYSTEM serves 2,643,729 people · EPA ID TX0150018 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Aug 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 523 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Google Fiber Fiber | 1,000 / 1,000 |
| Spectrum Cable | 1,000 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: Hotwire Communications.
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