4 Blackthorn Rd, Lafayette, CA 94549 Property Records

Contra Costa County property record for 4 Blackthorn Rd, Lafayette, CA 94549

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,780 sqft · built 1959
Lot Size	0.67 acres (29,185 sqft)
Owner	Trust Name on File
Last Sale	$1,225,000 (Apr 2010)
Tax Bill	$18,876 (2025)
Deeds & Mortgages	Aug 2023 Mortgage Sep 2021 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`251-030-029-2`

Property Details

APN / Parcel Number

Primary APN	`251-030-029-2`
Alternative APN	`251-030-029`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	9 Rooms
Stories	1 Story
Building Area	2,780 sqft Living Area
1st Floor Area	2,780 sqft

Exterior

Year Built	Built 1959
Effective Year Built	Effective 1985
Lot Area	29,185 sqft (0.67 acres)
Garage Type	Attached
Garage Area	383 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	4 BLACKTHORN RD
City	LAFAYETTE
State	CA
Zip	94549-3307
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10
Legal Description	RO ACALANES
Legal Subdivision	ACALANES RHO
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1003
Census Tract	353002

Owner

4 Blackthorn Rd is owner-occupied and held in a trust since July 2012.

Source: Contra Costa County records, as of July 14, 2026

Owner of Record	Trust Name on File
Mailing Address	4 BLACKTHORN RD, LAFAYETTE, CA 94549-3307
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.

Deeds, Mortgages & Sale History

Date	Document
Aug 7, 2023	Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC
Sep 7, 2021	Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC
Oct 26, 2019	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Apr 15, 2010 · Amount on File
Deed Sale	Apr 15, 2010 · Amount on File
Prior Sale	Feb 14, 2007 · Amount on File
Deed Document Number	201074160
Last Transfer Date	Jul 18, 2012
Transfer Doc	0000188491
Record Updated	Oct 29, 2026

August 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4 BLACKTHORN RD, LAFAYETTE, CA 94549-3307
Transaction Type	Mortgage
Record Updated	Aug 16, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4 BLACKTHORN RD, LAFAYETTE, CA 94549-3307

Mortgage

Document Number	0000074947
Date	Aug 7, 2023
Instrument	2023-074947

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	337 Months
Due	Sep 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	1.62%
Type Change Date	Sep 1, 2031
Change Frequency	6 Months
Min Rate At Change	3%
Max Rate At Change	6.62%
Margin	3
Max Rate	6.62%

September 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4 BLACKTHORN RD, LAFAYETTE, CA 94549-3307
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4 BLACKTHORN RD, LAFAYETTE, CA 94549-3307

Mortgage

Document Number	0000248954
Date	Sep 7, 2021
Instrument	2021-248954

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Sep 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	1.62%
Type Change Date	Sep 1, 2031
Change Frequency	6 Months
Min Rate At Change	3%
Max Rate At Change	6.62%
Index	Other
Margin	3
Max Rate	6.62%

October 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	4 BLACKTHORN RD, LAFAYETTE, CA 94549-3307
Document Number	0000195334
Instrument Date	Oct 26, 2019
Transaction Type	Mortgage
Record Updated	Nov 13, 2019
Title Company	AMROCK TITLE COMPANY, AMROCK TITLE CO

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	4 BLACKTHORN RD LAFAYETTE CA 945493307, LAFAYETTE, CA 94549-3307

Mortgage

Document Number	0000195334
Date	Nov 4, 2019
Instrument	195334

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Nov 3, 2049

Interest

Rate Type	Adjustable Rate
Rate	2.75%

Tax Assessment & Valuation

The 2025 property tax bill for 4 Blackthorn Rd was $18,876 with a homeowner's exemption.

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Lafayette City
Secondary School District	Acalanes Union High School District (09 - 12)
Elementary School District	Lafayette Elementary School District (KG - 08)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$1,670,901 (+2%) Land $1,244,220 Building $426,681
2025	$18,876.00 Homeowner's exemption	$1,638,139 Land $1,219,824 Building $418,315
2023	$18,228.00 (+1.53%) Homeowner's exemption	$1,574,529 Land $1,172,457 Building $402,072
2022	$17,954.00

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

Flood

FEMA maps place 4 Blackthorn Rd in Zone X, an area of minimal flood risk, though there have been 10 flood claims nearby since 1978.

Source: FEMA National Flood Hazard Layer, effective October 12, 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	3 in force
Nearby Flood Claims	10 (1978–2001)
Claims Outside the SFHA	7 of 10
Most Recent Claim	Mar 2001 · rainfall accumulation
Claims by Event	Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 2 claims Severe Winter Storms, Flooding, Landslides, Mud Flows, Jan 1995 · 2 claims Coastal Storms, Floods, Slides & Tornadoes, Mar 1983 · 2 claims

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.

Wildfire

Wildfire risk around 4 Blackthorn Rd is low, with a 0.02% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 94% of the US · lower than 96% of California
Wildfire Likelihood	0.02% annual chance
Exposure	None beyond 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 System	EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source	Surface water
Last State Inspection	Dec 2021
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

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. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 180 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25

May also be available: AT&T, Etheric Networks, Verizon.

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