821 Bertram St, Walnut Creek, CA 94598 Property Records

Contra Costa County property record for 821 Bertram St, Walnut Creek, CA 94598

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 3,503 sqft · built 1997
Lot Size	0.969 acres (42,210 sqft)
Owner	Trust Name on File
Last Sale	$2,010,000 (Apr 2021)
Tax Bill	$24,879 (2025)
Deeds & Mortgages	Jun 2022 Transfer Apr 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`138-130-004-3`

Property Details

APN / Parcel Number

Primary APN	`138-130-004-3`
Alternative APN	`138-130-004`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	3,503 sqft Living Area
1st Floor Area	1,995 sqft
2nd Floor Area	1,508 sqft

Exterior

Year Built	Built 1997
Effective Year Built	Effective 2005
Lot Area	42,210 sqft (0.969 acres)
Garage Type	Attached
Garage Area	792 sqft
Parking Spaces	3 Parking Spaces

Location & Zoning

Street Address	821 BERTRAM ST
City	WALNUT CREEK
State	CA
Zip	94598-5150
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R40
Legal Description	T7353 L1
Legal Subdivision	SUBDIVISION 7353
Legal Tract	7353
Legal Lot Number	1
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	2
Census Block	2000
Census Tract	338302

Owner

821 Bertram St is owner-occupied and held in a trust since May 2022.

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

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

Owner of Record	Trust Name on File
Mailing Address	821 BERTRAM ST, WALNUT CREEK, CA 94598-5150
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Jun 6, 2022	Intrafamily Transfer, Transfer
Apr 23, 2021	Grant Deed, Transfer · Conventional Mortgage BANK OF AMERICA NA

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Apr 23, 2021 · Amount on File
Deed Sale	Apr 23, 2021 · Amount on File
Prior Sale	Mar 27, 1998 · Amount on File
Deed Document Number	2021123783
Last Transfer Date	May 17, 2022
Transfer Doc	0000094801
Record Updated	Sep 20, 2026

June 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 6, 2022
Property Address	821 BERTRAM ST, WALNUT CREEK, CA 94598-5150
Document Number	0000094801
Map Reference	MB 358 PG 42
Instrument Date	May 17, 2022
Instrument	2022-094801
Transaction Type	Transfer
Record Updated	Jun 7, 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
Relationship	Family Trust
Address	821 BERTRAM ST, WALNUT CREEK, CA 94598-5150

April 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Apr 23, 2021
Property Address	821 BERTRAM ST, WALNUT CREEK, CA 94598-5150
Document Number	0000123783
Map Reference	MB 358 PG 42
Instrument Date	Feb 15, 2021
Instrument	2021-123783
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV 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
Relationship	Joint Tenants
Address	821 BERTRAM ST, WALNUT CREEK, CA 94598-5150

Mortgage

Document Number	0000123784
Date	Apr 23, 2021
Instrument	2021-123784

Lender

Name	BANK OF AMERICA NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	May 1, 2051

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 821 Bertram St was $24,879 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
Unified School District	Mount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$2,223,361 (+2%) Land $1,424,263 Building $799,098
2025	$24,879.00 Homeowner's exemption	$2,179,767 Land $1,396,337 Building $783,430
2023	$23,913.00 (+0.61%) Homeowner's exemption	$2,091,204 Land $1,342,116 Building $749,088
2022	$23,768.00

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

Flood

FEMA maps place 821 Bertram St in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 1998.

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
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	2 in force
Nearby Flood Claims	2 (1998–2016)
Most Recent Claim	Mar 2016 · other causes

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 821 Bertram St is moderate, ranking above 66% of the US, with a 0.2% annual chance of wildfire.

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

Wildfire Risk	Moderate above 66% of the US · above 40% of California
Wildfire Likelihood	0.2% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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	CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003
Water Source	Surface water
Last State Inspection	Jan 2022
Lead	Under 1 ppb (2026–2028) 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 110 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
Verizon Fixed Wireless	300 / 20
AT&T DSL	100 / 20

May also be available: Astound Broadband.

Cell Coverage

5G (outdoors only) and 4G LTE

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