San Joaquin County property record for 121 Patterson Ave, Mountain House, CA 95391
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,714 sqft · built 2006 |
| Lot Size | 0.152 acres (6,637 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $682,000 (Feb 2006) |
| Tax Bill | $14,573 (2026) |
| Deeds & Mortgages | Oct 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 254-150-430-000 |
| Primary APN | 254-150-430-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Stories | 2 Stories |
| Building Area | 2,714 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2006 |
|---|---|
| Effective Year Built | Effective 2006 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 6,637 sqft (0.152 acres) |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Old Parcel Number | 254-150-43 |
|---|---|
| Street Address | 121 PATTERSON AVE |
| City | TRACY |
| State | CA |
| Zip | 95391-1055 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RL |
| Legal Description | LOT 77 |
| Legal Subdivision | MOUNTAIN HOUSE NEIGHBORHOOD F |
| Legal Block | 1 |
| Legal Lot Number | 77 |
| Jurisdiction | SAN JOAQUIN CA |
| Township / Civil Division | TRACY |
| Census Block Group | 1 |
| Census Block | 1009 |
| Census Tract | 5222 |
121 Patterson Ave is held in a trust since February 2006.
Source: San Joaquin County records, as of October 13, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 6525 MAYHEWS LANDING RD, NEWARK, CA 94560-2301 |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
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 | Feb 28, 2006 · Amount on File |
| Deed Sale | Feb 28, 2006 · Amount on File |
| Prior Sale | May 4, 2005 |
| Deed Document Number | 200643684 |
| Prior Transfer Date | May 1, 2005 |
| Prior Transfer Doc | 0000106110 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN JOAQUIN CA |
| Property Address | 121 PATTERSON AVE, MOUNTAIN HOUSE, CA 95391-1055 |
| Transaction Type | Mortgage |
| Record Updated | Oct 18, 2021 |
| Title Company | OLD REPUBLIC TITLE |
| Name | Verified Name |
|---|---|
| Address | 6525 MAYHEWS LANDING RD, NEWARK, CA 94560-2301 |
| Document Number | 0000167384 |
|---|---|
| Date | Oct 5, 2021 |
| Instrument | 2021-167384 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Nov 1, 2051 |
The 2026 property tax bill for 121 Patterson Ave was $14,573, up 5.1% from the year before.
Source: San Joaquin County assessment roll, as of September 24, 2025
| Type | Name |
|---|---|
| State | California |
| County | San Joaquin County |
| Municipality | Mountain House City |
| Unified School District | Lammersville Joint Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $14,573.00 (+5.08%) | ||
| 2025 | $13,868.00 | $927,793 Land $371,692 Building $556,101 | |
| 2023 | $13,270.00 (+2.04%) | $891,767 Land $357,259 Building $534,508 | $882,540 |
| 2022 | $13,005.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 121 Patterson Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 27, 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.
Wildfire risk around 121 Patterson Ave is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% 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 | CITY OF MOUNTAIN HOUSE serves 26,400 people · EPA ID CA3910027 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2025 |
| Lead | Under 1 ppb (2025) 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 730 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Matrix Broadband Fixed Wireless | 400 / 80 |
| unWired Broadband Fixed Wireless | 400 / 50 |
| Cal.net Fixed Wireless | 100 / 20 |
May also be available: Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures