3643 Brook St, Lafayette, CA 94549 Property Records

Contra Costa County property record for 3643 Brook St, Lafayette, CA 94549

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 2,742 sqft · built 1946
Lot Size	0.45 acres (19,600 sqft)
Owner	Individual Name on File
Last Sale	$2,290,000 (Nov 2025)
Tax Bill	$16,796 (2025)
Deeds & Mortgages	Nov 2025 Sale Jun 2023 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`241-100-025-6`

Property Details

APN / Parcel Number

Primary APN	`241-100-025-6`
Alternative APN	`241-100-025`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	2 Stories
Building Area	2,742 sqft Living Area
1st Floor Area	1,974 sqft
2nd Floor Area	768 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1946
Effective Year Built	Effective 1965
Lot Area	19,600 sqft (0.45 acres)
Garage Type	Attached
Garage Area	924 sqft
Parking Spaces	4 Parking Spaces

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Street Address	3643 BROOK ST
City	LAFAYETTE
State	CA
Zip	94549-4234
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LAFAYETTE HEIGHTS POR LOT 61 & TR ADJ
Legal Subdivision	LAFAYETTE HEIGHTS
Legal Lot Number	61
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	4
Census Block	4008
Census Tract	350000

Owner

3643 Brook St is owned and occupied by an individual who bought it in November 2025.

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

Owner of Record	Individual Name on File
Mailing Address	3643 BROOK ST, LAFAYETTE, CA 94549-4234
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Single Woman

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
Nov 26, 2025	Grant Deed, Transfer CHICAGO TITLE COMPANY
Jun 16, 2023	Intrafamily Transfer, Transfer
Dec 21, 2020	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Nov 26, 2025 · Amount on File
Deed Sale	Nov 26, 2025 · Amount on File
Prior Sale	Nov 6, 2024 · Amount on File
Deed Document Number	2025133733
Prior Transfer Date	Oct 28, 2024
Prior Transfer Doc	0000120103
Record Updated	Sep 20, 2026

November 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 26, 2025
Property Address	3643 BROOK ST, LAFAYETTE, CA 94549-4234
Document Number	0000133733
Map Reference	MB 7 PG 163
Instrument Date	Nov 25, 2025
Instrument	2025- 133733
Transaction Type	Transfer
Record Updated	Dec 9, 2025
Title Company	CHICAGO TITLE COMPANY

Transaction

Amount	Amount on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3643 BROOK ST, LAFAYETTE, CA 94549-4234

June 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 16, 2023
Property Address	3643 BROOK ST, LAFAYETTE, CA 94549-4234
Document Number	0000057824
Map Reference	MB 7 PG 163
Instrument Date	Jun 10, 2023
Instrument	2023-057824
Transaction Type	Transfer
Record Updated	Jun 27, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3643 BROOK ST, LAFAYETTE, CA 94549-4234

December 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Dec 21, 2020
Property Address	3643 BROOK ST, LAFAYETTE, CA 94549-4234
Document Number	0000320756
Instrument Date	Aug 4, 2020
Instrument	320756
Transaction Type	Transfer
Record Updated	Jan 20, 2021
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	3643 BROOK ST LAFAYETTE CA 945494234, LAFAYETTE, CA 94549-4234

Tax Assessment & Valuation

The 2025 property tax bill for 3643 Brook St was $16,796.

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		$2,290,000 (+69.63%) Land $1,290,000 Building $1,000,000
2025	$16,796.00	$1,350,000 Land $950,000 Building $400,000
2023	$9,162.00 (+1.59%) Homeowner's exemption	$658,405 (+2%) Land $306,896 Building $351,509
2022	$9,019.00 Homeowner's exemption	$645,496 Land $300,879 Building $344,617

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 3643 Brook St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	4 in force
Nearby Flood Claims	6 (1983–1998)
Claims Outside the SFHA	4 of 6
Most Recent Claim	Feb 1998 · Severe Winter Storms And Flooding

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 3643 Brook St is moderate, ranking above 45% of the US, with a 0.08% annual chance of wildfire.

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

Wildfire Risk	Moderate above 45% of the US · lower than 73% of California
Wildfire Likelihood	0.08% 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 275 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
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Etheric Networks, T-Mobile, Verizon.

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