Los Angeles County property record for 401 Patterson Dr, Monrovia, CA 91016
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,691 sqft · built 1941 |
| Lot Size | 0.154 acres (6,715 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $290,000 (May 1999) |
| Tax Bill | $6,423 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8520-020-021 |
| Primary APN | 8520-020-021 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,691 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1941 |
|---|---|
| Effective Year Built | Effective 1942 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Hip |
| Roof Material | Wood Shingle |
| Lot Area | 6,715 sqft (0.154 acres) |
| Lot Dimensions | 135 ft deep x 50 ft wide |
| Garage Type | Attached |
| Cooling System | Central |
|---|---|
| Heating System | Floor/Wall Furnace |
| Street Address | 401 PATTERSON DR |
|---|---|
| City | MONROVIA |
| State | CA |
| Zip | 91016-1622 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | MORL* |
| Legal Description | TRACT NO 1O27O LOT 3 |
| Legal Subdivision | 1 |
| Legal Tract | 10270 |
| Legal Block | 1 |
| Legal Lot Number | 3 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | UPPER SAN GABRIEL VALLEY |
| Census Block Group | 1 |
| Census Block | 1008 |
| Census Tract | 430301 |
Source: Los Angeles County records, as of August 25, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 401 PATTERSON DR, MONROVIA, CA 91016-1622 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Personal Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 7, 1999 · Amount on Record |
| Deed Sale | May 7, 1999 · Amount on Record |
| Deed Document Number | 1999826530 |
| Last Transfer Date | Jul 6, 2011 |
| Transfer Doc | 0000945810 |
| Record Updated | Oct 29, 2026 |
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Monrovia City |
| Unified School District | Monrovia Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $463,702 (+2%) Land $267,990 Building $195,712 | |
| 2025 | $6,423.00 (+4.87%) Homeowner's exemption | $454,611 (+4.04%) Land $262,736 Building $191,875 |
| 2023 | $6,125.00 (+2.94%) Homeowner's exemption | $436,960 Land $252,535 Building $184,425 |
| 2022 | $5,950.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective September 30, 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 | 2 in force |
| Nearby Flood Claims | 2 (1980–1992) |
| Most Recent Claim | Feb 1992 · Rain/snow/wind Storms, Flooding, Mudslides |
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 | High above 70% of the US · above 45% of California |
|---|---|
| Wildfire Likelihood | 0.3% 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 | MONROVIA-CITY, WATER DEPT. serves 37,931 people · EPA ID CA1910090 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Sep 2024 |
| Lead | Under 1 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.
Source: FCC Broadband Data Collection, based on 578 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Giggle Fiber Cable | 1,000 / 40 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: T-Mobile.
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