Los Angeles County property record for 423 Mountain Crest Rd, Duarte, CA 91010
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,804 sqft · built 1962 |
| Lot Size | 0.184 acres (7,995 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $2,138 (2025) |
| Deeds & Mortgages | May 2021 Reverse Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 8610-012-012 |
| Primary APN | 8610-012-012 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 1,804 sqft Living Area |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1965 |
| Construction Type | Wood |
| Lot Area | 7,995 sqft (0.184 acres) |
| Heating System | Central |
|---|
| Street Address | 423 MOUNTAIN CREST RD |
|---|---|
| City | DUARTE |
| State | CA |
| Zip | 91010-1541 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | DUR17500* |
| Legal Description | TRACT NO 20497 LOT 68 |
| Legal Subdivision | 20497 |
| Legal Tract | 20497 |
| Legal Block | 3 |
| Legal Lot Number | 68 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | UPPER SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 430003 |
423 Mountain Crest Rd is owner-occupied and held in a trust.
Source: Los Angeles County records, as of August 25, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 423 MOUNTAIN CREST RD, DUARTE, CA 91010-1541 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | 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 |
|---|---|
| Record Updated | Oct 29, 2026 |
| Document Type | Affidavit of Death of Trustee |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | May 20, 2021 |
| Property Address | 423 MOUNTAIN CREST RD, DUARTE, CA 91010-1541 |
| Document Number | 0000809016 |
| Map Reference | MB 679 PG 71&72 |
| Instrument Date | Feb 7, 2021 |
| Instrument | 21-0809016 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Title Company | TIMIOS TITLE A CA CORP |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 423 MOUNTAIN CREST RD, DUARTE, CA 91010-1541 |
| Document Number | 0000809017 |
|---|---|
| Date | May 20, 2021 |
| Instrument | 21-0809017 |
| Name | AMERICAN ADVISORS GROUP |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92612 |
| Type | Reverse Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 827 Months |
| Due | Apr 20, 2090 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.19% |
| Type Change Date | Apr 1, 2021 |
| Change Frequency | Annually |
| Index | 1-Year LIBOR |
The 2025 property tax bill for 423 Mountain Crest Rd was $2,138 with a homeowner's exemption.
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Duarte City |
| Unified School District | Duarte Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $105,202 (+2%) Land $27,220 Building $77,982 | |
| 2025 | $2,138.00 Homeowner's exemption | $103,140 Land $26,687 Building $76,453 |
| 2023 | $1,914.00 (+2.19%) Homeowner's exemption | $99,136 Land $25,651 Building $73,485 |
| 2022 | $1,873.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 423 Mountain Crest Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 30, 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 423 Mountain Crest Rd is moderate, ranking above 51% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 51% of the US · lower than 69% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect within 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 | CAL-AM WATER COMPANY - DUARTE private · serves 24,767 people · EPA ID CA1910186 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Feb 2025 |
| Lead | 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 432 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 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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