Bexar County property record for 855 Proton Rd, San Antonio, TX 78258 · Last verified July 2026
| Property Type | Commercial > Office > Medical Building |
|---|---|
| Year Built | Built 2007 |
| Square Footage | 12,719 sqft Total Area |
| Lot Size | 115,870 sqft (2.66 acres) |
| Tax Bill | $72,559.00 (2025) |
Source: Bexar County records · APN 17429-002-0030
Assessment roll updated May 26, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Owner Type | Owner is a Company |
| Date | Document |
|---|---|
| Jul 01, 2026 | Special Warranty Deed, Transfer TEXAS INVESTORS TITLE |
| Jul 01, 2026 | Special Warranty Deed, Transfer TEXAS INVESTORS TITLE |
| Jul 01, 2026 | Special Warranty Deed, Transfer TEXAS INVESTORS TITLE |
| Apr 01, 2026 | Special Warranty Deed, Transfer NONE LISTED ON DOCUMENT |
| Jan 16, 2026 | Special Warranty Deed, Transfer · Commercial Mortgage CADENCE BANK NA |
| May 20, 2021 | Special Warranty Deed, Transfer · Commercial Mortgage FIFTH THIRD BANK NA |
| Sep 27, 2018 | Deed of Trust, Mortgage MISCELLANEOUS INS CO |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jul 01, 2026 |
| Deed Sale | Jul 01, 2026 |
| Prior Sale | Jul 01, 2026 |
| Deed Doc Number | 2026127342 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BEXAR TX |
| Recording Date | Jul 01, 2026 |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000127341 |
| Instrument Date | Jun 29, 2026 |
| Instrument | 2026127341 |
| Transaction Type | Transfer |
| Record Updated | Jul 14, 2026 |
| Title Company | TEXAS INVESTORS TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BEXAR TX |
| Recording Date | Jul 01, 2026 |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000127340 |
| Instrument Date | Jun 29, 2026 |
| Instrument | 2026127340 |
| Transaction Type | Transfer |
| Record Updated | Jul 14, 2026 |
| Title Company | TEXAS INVESTORS TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BEXAR TX |
| Recording Date | Jul 01, 2026 |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000127342 |
| Instrument Date | Jun 29, 2026 |
| Instrument | 2026127342 |
| Transaction Type | Transfer |
| Record Updated | Jul 14, 2026 |
| Title Company | TEXAS INVESTORS TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BEXAR TX |
| Recording Date | Apr 01, 2026 |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000060099 |
| Instrument Date | Mar 25, 2026 |
| Instrument | 202660099 |
| Transaction Type | Transfer |
| Record Updated | Jul 13, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Trust |
| Address | 6016 CONNERLY DR, DALLAS, TX 75205-1749 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BEXAR TX |
| Recording Date | Jan 16, 2026 |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000009474 |
| Map Reference | VOL 9514 PG 153 |
| Instrument Date | Nov 24, 2025 |
| Instrument | 20260009474 |
| Transaction Type | Transfer |
| Record Updated | Jan 30, 2026 |
| Title Company | TEXAS INVESTORS TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 4849 GREENVILLE AVE # 1270, 1270, DALLAS, TX 75206-4130 |
| Document Number | 0000009475 |
|---|---|
| Date | Jan 16, 2026 |
| Instrument | 20260009475 |
| Name | CADENCE BANK NA |
|---|---|
| Type | Bank |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount Recorded |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BEXAR TX |
| Recording Date | May 20, 2021 |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000137771 |
| Map Reference | VOL 9514 PG 153 |
| Instrument Date | May 19, 2021 |
| Instrument | 20210137771 |
| Transaction Type | Transfer |
| Record Updated | Sep 29, 2023 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants In Common |
| Address | 1900 MIANT STREET #375 # 375, 375, IRVINE, CA 92614 |
| Document Number | 0000137772 |
|---|---|
| Date | May 20, 2021 |
| Instrument | 20210137772 |
| Name | FIFTH THIRD BANK NA |
|---|---|
| Type | Bank |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 60 Months |
| Due | May 19, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BEXAR TX |
| Property Address | 855 PROTON RD, SAN ANTONIO, TX 78258-4203 |
| Document Number | 0000191967 |
| Instrument Date | Sep 27, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Oct 09, 2018 |
| Title Company | CHICAGO TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Relationship | Limited Partnership |
| Address | 8415 DATAPOINT DR #700 SAN ANTONIO TX 782293327, 700, SAN ANTONIO, TX 78229-3327 |
| Document Number | 0000191967 |
|---|---|
| Date | Sep 27, 2018 |
| Instrument | 191967 |
| Name | MISCELLANEOUS INS CO |
|---|---|
| Address | 6000 AMERICAN PKWY, MADISON, WI 53783-0001 |
| Amount | Amount Recorded |
|---|---|
| Term | 120 Months |
| Due | Sep 26, 2028 |
| Rate | 4.67% |
|---|
Source: Bexar County records · Assessment roll updated May 26, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Bexar County |
| Municipality | San Antonio City |
| Unified School District | North East Independent School District (PK - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $72,559.00 (+2.41%) | $3,200,000 (+3.23%) Land $1,480,990 Building $1,719,010 | $3,200,000 (+3.23%) Land $1,480,990 Building $1,719,010 |
| 2024 | $70,851.00 (-0.43%) | ||
| 2023 | $71,159.00 (-1.31%) | $3,100,000 Land $1,356,790 Building $1,743,210 | $3,100,000 Land $1,356,790 Building $1,743,210 |
| 2022 | $72,106.00 |
Source: FEMA National Flood Hazard Layer, Bexar County (48029C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified: October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
| Primary APN | 17429-002-0030 |
|---|---|
| Alternative APN |
|
| Building Area | 12,719 sqft Total Area |
|---|---|
| 1st Floor | 12,719 sqft 1st Floor |
| Stories | 1 Stories |
| Year Built | Built 1999 |
|---|---|
| Effective Year Built | Effective 2007 |
| Exterior Material | Brick Exterior |
| Construction Type | Concrete Construction |
| Fire Resistance Class | Buildings having exterior walls built of a non-combustible material such as brick, concrete, block or poured concrete. Interior partitions and roof structure are built of combustible materials. Floor may be concrete or wood frame. |
| Roof Construction | Sawtooth Roof Construction |
| Roof Material | Composition Shingle Roof |
| Lot Area | 115,870 sqft (2.66 acres) |
| Driveway | Driveway Asphalt |
| Parking Spaces | 163 Parking Spaces |
| Deck Area | Deck Area |
| Canopy Area | 2,300 sqft Canopy |
| Cooling System | Central Cooling |
|---|---|
| Heating System | Central Heating |
| Street Address | 855 PROTON RD |
|---|---|
| City | SAN ANTONIO |
| State | TX |
| Zip | 78258-4203 |
| Property Usage | Commercial Property Usage |
| Type | Commercial > Office > Medical Building |
| Legal Description | NCB 17429 BLK 2 LOT 3 METROPOLITAN BUS PK UT 7 |
| Legal Subdivision | METROPOLITAN BUS PARK SUB U |
| Legal Block | 2 |
| Legal Lot Number | 3 |
| Jurisdiction | BEXAR TX |
| Minor Civil Division | SAN ANTONIO NORTH |
| Census Blockgroup | 1 |
| Census Block | 1006 |
| Census Tract | 191818 |
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