Los Angeles County property record for 3646 Monterosa Dr, Altadena, CA 91001
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,100 sqft · built 1958 |
| Lot Size | 0.386 acres (16,816 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $459,000 (Dec 1999) |
| Tax Bill | $4,230 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 5843-004-016 |
| Primary APN | 5843-004-016 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 3,100 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1958 |
|---|---|
| Effective Year Built | Effective 1960 |
| Architectural Style | Contemporary |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Gable |
| Roof Material | Gravel |
| Lot Area | 16,816 sqft (0.386 acres) |
| Lot Dimensions | 190 ft deep x 89 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Water Source | Commercial |
| Street Address | 3646 MONTEROSA DR |
|---|---|
| City | ALTADENA |
| State | CA |
| Zip | 91001-4028 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR110 |
| Legal Description | TRACT # 18250 LOT 31 |
| Legal Subdivision | 18250 |
| Legal Tract | 18250 |
| Legal Block | 1 |
| Legal Lot Number | 31 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | PASADENA |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 460200 |
Source: Los Angeles County records, as of September 24, 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 | 3579 E FOOTHILL BLVD, PASADENA, CA 91107-3119 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 2, 1999 · Amount on Record |
| Deed Sale | Dec 2, 1999 · Amount on Record |
| Prior Sale | Apr 28, 1995 · Amount on Record |
| Deed Document Number | 19992219390 |
| Record Updated | Oct 29, 2026 |
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Unified School District | Pasadena Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $333,211 (+2%) Land $333,211 | |
| 2025 | $4,230.00 (-50.4%) Homeowner's exemption | $326,678 (-51.82%) Land $326,678 |
| 2023 | $8,529.00 (+4.08%) Homeowner's exemption | $678,058 Land $483,066 Building $194,992 |
| 2022 | $8,195.00 |
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 |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 4 in force |
| Nearby Flood Claims | 6 (1995–2023) |
| Claims Outside the SFHA | 6 of 6 |
| Most Recent Claim | Mar 2023 · Severe Winter Storms, Straight-line Winds, Flooding, Landslides, And 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 | Extreme above 97.3% of the US · above 86% of California |
|---|---|
| Wildfire Likelihood | 2% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
Insurers in high-risk areas may require mitigation or decline coverage; check availability before making an offer.
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 | LINCOLN AVENUE WATER CO. private · serves 8,721 people · EPA ID CA1910063 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Aug 2022 |
| Lead | Under 1 ppb (2026–2028) 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 290 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
May also be available: GeoLinks, Verizon.
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