San Diego County property record for 448 Blackthorne Ave, El Cajon, CA 92020
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,498 sqft · built 1960 |
| Lot Size | 0.238 acres (10,353 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $252,000 (Aug 2011) |
| Tax Bill | $4,476 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 486-551-32-00 |
| Primary APN | 486-551-32-00 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 2,498 sqft Living Area |
| Year Built | Built 1960 |
|---|---|
| Effective Year Built | Effective 1960 |
| Lot Area | 10,353 sqft (0.238 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 448 BLACKTHORNE AVE |
|---|---|
| City | EL CAJON |
| State | CA |
| Zip | 92020-5605 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RS-6 |
| Legal Description | PAR 2 TR PM17849 |
| Legal Subdivision | CITY OF EL CAJON |
| Legal Tract | 1017849 |
| Legal Block | 2 |
| Jurisdiction | SAN DIEGO CA |
| Township / Civil Division | SAN DIEGO |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 16000 |
448 Blackthorne Ave is owned and occupied by two individuals who bought it in August 2011.
Source: San Diego County records, as of July 28, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 448 BLACKTHORNE AVE, EL CAJON, CA 92020-5605 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | Aug 19, 2011 · Amount on File |
| Deed Sale | Aug 19, 2011 · Amount on File |
| Prior Sale | Nov 26, 2008 · Amount on File |
| Deed Document Number | 2011427590 |
| Prior Transfer Date | Aug 27, 2008 |
| Prior Transfer Doc | 0000469258 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 448 Blackthorne Ave was $4,476 with a homeowner's exemption.
Source: San Diego County assessment roll, as of July 28, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Diego County |
| Municipality | El Cajon City |
| Secondary School District | Grossmont Union High School District (09 - 12) |
| Elementary School District | La Mesa-Spring Valley School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $343,538 (+2%) Land $125,677 Building $217,861 | |
| 2025 | $4,476.00 Homeowner's exemption | $336,803 Land $123,213 Building $213,590 |
| 2023 | $4,418.00 (+1.14%) Homeowner's exemption | $323,727 Land $118,430 Building $205,297 |
| 2022 | $4,368.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 448 Blackthorne Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 3, 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.
The area around 448 Blackthorne Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land 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 | HELIX WATER DISTRICT serves 277,918 people · EPA ID CA3710010 |
|---|---|
| Water Source | Surface water |
| 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 373 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL | 5,000 / 5,000 |
| Cox Communications Cable | 2,000 / 100 |
| Starlink Satellite | 280 / 30 |
May also be available: T-Mobile, Verizon.
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