Guadalupe County property record for 309 Mostyn Ln, San Marcos, TX 78666
| Property Type | Mobile Home |
|---|---|
| Details | 1,139 sqft · built 1999 |
| Lot Size | 1.05 acres (45,738 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $2,883 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 2G0339000000903000 |
| Primary APN | 2G0339000000903000 |
|---|---|
| Alternative APNs |
|
| Stories | 1 Story |
|---|---|
| Building Area | 1,139 sqft Living Area |
| 1st Floor Area | 1,139 sqft |
| Year Built | Built 1999 |
|---|---|
| Effective Year Built | Effective 1999 |
| Architectural Style | Mobile Home |
| Exterior Material | Aluminum/Vinyl |
| Roof Type | Gable |
| Roof Material | Composition Shingle |
| Lot Area | 45,738 sqft |
| Garage Type | Carport |
| Garage Area | 660 sqft |
| Carport | Carport |
| Carport Area | 660 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 80 sqft |
| Patio Area | 400 sqft |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Water Source | Cistern |
| Street Address | 309 MOSTYN LN |
|---|---|
| City | SAN MARCOS |
| State | TX |
| Zip | 78666-1642 |
| Property Category | Residential |
| Property Type | Residential > Prefabricated > Mobile Home |
| Legal Description | ABS: 339 SUR: JOHN WELLS 1.0500AC TRACT #3 AKA: MOSTYN POINT MH=HWC0279465/466 |
| Legal Subdivision | WELLS JOHN |
| Legal Tract | 3 |
| Legal Block | 2 |
| Jurisdiction | GUADALUPE TX |
| Township / Civil Division | NORTHEAST GUADALUPE |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 210506 |
Source: Guadalupe County records, as of August 12, 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 | 309 MOSTYN LN, SAN MARCOS, TX 78666-1642 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Guadalupe County assessment roll, as of August 12, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Guadalupe County |
| Unified School District | San Marcos Consolidated Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $187,590 (-12.19%) Land $105,325 Building $82,265 | $187,590 (-12.19%) Land $105,325 Building $82,265 | |
| 2025 | $2,883.00 (+4.91%) | $213,635 (+24.66%) Land $139,594 Building $74,041 | $213,635 (+24.66%) Land $139,594 Building $74,041 |
| 2024 | $2,748.00 (+21.54%) | ||
| 2023 | $2,261.00 (-0.79%) | $171,372 Land $100,234 Building $71,138 | $171,372 Land $100,234 Building $71,138 |
| 2022 | $2,279.00 |
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 April 27, 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 |
| Flood Insurance Cost | Premium on Record median of 24 policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 24 in force |
| Nearby Flood Claims | 23 (1998–2017) |
| Claims Outside the SFHA | 3 of 23 |
| Most Recent Claim | Aug 2017 · Hurricane Harvey |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 45% of the US · lower than 81% of Texas |
|---|---|
| Wildfire Likelihood | 0.08% annual chance |
| Exposure | Direct burnable vegetation |
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 | CRYSTAL CLEAR SUD serves 20,766 people · EPA ID TX0940015 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Aug 2025 |
| Lead | 2 ppb (2025) action level 15 ppb |
| Water Quality | Haloacetic acids resolved · Jul 2019 Total trihalomethanes resolved · Jul 2019 Failure to filter resolved · Apr 2012 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 2 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 22 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| VTX Communications Fixed Wireless | 400 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| Guadalupe Valley Electric Cooperative Fixed Wireless | 100 / 20 |
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