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657 Blackthorne Ave, El Cajon, CA 92020 Property Records

San Diego County property record for 657 Blackthorne Ave, El Cajon, CA 92020

Property Summary

Property TypeSingle Family Home
Details4 bd · 3 ba · 1,874 sqft · built 1952
Lot Size0.269 acres (11,700 sqft)
Owner2 Trust Names on File
Tax Bill$2,353 (2025)
Deeds & MortgagesSep 2018 Transfer
Apr 2018 Transfer
+ 2 more
Flood ZoneZone X (minimal risk)
APN487-371-04-00

Property Details

APN / Parcel Number

Primary APN487-371-04-00

Interior

Bedrooms4 Beds
Full Baths3 Baths
Building Area1,874 sqft Living Area

Exterior

Year BuiltBuilt 1952
Effective Year BuiltEffective 1952
Lot Area11,700 sqft (0.269 acres)
Garage TypeCarport
CarportCarport
Parking Spaces2 Parking Spaces

Location & Zoning

Street Address657 BLACKTHORNE AVE
CityEL CAJON
StateCA
Zip92020-5608
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeRS-6
Legal DescriptionLOT 4 TR 002755
Legal SubdivisionGROSSMONT TERRACE
Legal Tract002755
Legal Block2
Legal Lot Number4
JurisdictionSAN DIEGO CA
Township / Civil DivisionSAN DIEGO
Census Block Group2
Census Block2011
Census Tract16000

Owner

657 Blackthorne Ave is owner-occupied and held in a trust since December 2024.

Source: San Diego County records, as of July 28, 2026

Owner of Record2 Trust Names on File
Mailing Address657 BLACKTHORNE AVE, EL CAJON, CA 92020-5608
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

DateDocument
Sep 17, 2018Quit Claim Deed, Transfer
ATTORNEY ONLY
Apr 25, 2018Quit Claim Deed, Transfer
ATTORNEY ONLY
Jan 18, 2017Quit Claim Deed, Transfer
ATTORNEY ONLY
Jan 18, 2017Quit Claim Deed, Transfer
ATTORNEY ONLY

Assessor's Deed Record

Deed Names2 Names on Deed
Last Transfer DateDec 27, 2024
Transfer Doc0000006084
Record UpdatedSep 20, 2026

September 2018: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN DIEGO CA
Recording DateSep 17, 2018
Property Address657 BLACKTHORNE AVE, EL CAJON, CA 92020-5608
Document Number0000386265
Instrument DateSep 11, 2018
Instrument386265
Transaction TypeTransfer
Record UpdatedSep 26, 2018
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipRevocable Trust
Address657 BLACKTHORNE AVE EL CAJON CA 920205608, EL CAJON, CA 92020-5608

April 2018: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN DIEGO CA
Recording DateApr 25, 2018
Property Address657 BLACKTHORNE AVE, EL CAJON, CA 92020-5608
Document Number0000164384
Instrument DateApr 24, 2018
Instrument164384
Transaction TypeTransfer
Record UpdatedMay 2, 2018
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer
  • Partial Interest

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipPersonal Trust
Address657 BLACKTHORNE AVE EL CAJON CA 920205608, EL CAJON, CA 92020-5608

January 2017: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN DIEGO CA
Recording DateJan 18, 2017
Property Address657 BLACKTHORNE AVE, EL CAJON, CA 92020-5608
Document Number0000028182
Instrument DateDec 16, 2016
Instrument28182
Transaction TypeTransfer
Record UpdatedJan 24, 2017
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer
  • Partial Interest

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipPersonal Trust
Address657 BLACKTHORNE AVE EL CAJON CA 920205608, EL CAJON, CA 92020-5608

January 2017: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN DIEGO CA
Recording DateJan 18, 2017
Property Address657 BLACKTHORNE AVE, EL CAJON, CA 92020-5608
Document Number0000028181
Instrument DateDec 16, 2016
Instrument28181
Transaction TypeTransfer
Record UpdatedJan 24, 2017
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipTenants in Common
Address215 E 99TH ST #320 NEW YORK NY 100290261, 320, NEW YORK, NY 10029-0261

Tax Assessment & Valuation

The 2025 property tax bill for 657 Blackthorne Ave was $2,353.

Source: San Diego County assessment roll, as of July 28, 2026

Property Jurisdictions

TypeName
StateCalifornia
CountySan Diego County
MunicipalityEl Cajon City
Secondary School DistrictGrossmont Union High School District (09 - 12)
Elementary School DistrictLa Mesa-Spring Valley School District (KG - 08)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$467,841 (+258.35%) Land $244,362 Building $223,479
2025$2,353.00 Homeowner's exemption$130,555 Land $34,388 Building $96,167
2023$2,034.00 (+3.62%) Homeowner's exemption$125,487 Land $33,053 Building $92,434
2022$1,963.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 657 Blackthorne Ave in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective September 3, 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

The area around 657 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 RiskNot rated
no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemHELIX WATER DISTRICT
serves 277,918 people · EPA ID CA3710010
Water SourceSurface water
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 373 locations within half a mile, as of December 31, 2025

ProviderMax 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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