1821 S Main St, Walnut Creek, CA 94595 Property Records

Contra Costa County property record for 1821 S Main St, Walnut Creek, CA 94595

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,829 sqft · built 1978
Lot Size	0.56 acres (24,400 sqft)
Owner	2 Trust Names on File
Last Sale	$1,361,000 (Sep 2025)
Tax Bill	$15,551 (2025)
Deeds & Mortgages	Sep 2025 Sale & Mortgage Mar 2023 Sale
Flood Zone	Zone AE (high risk)
APN	`184-392-035-4`

Property Details

APN / Parcel Number

Primary APN	`184-392-035-4`
Alternative APN	`184-392-035`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,829 sqft Living Area
1st Floor Area	1,829 sqft

Exterior

Year Built	Built 1978
Effective Year Built	Effective 1979
Lot Area	24,400 sqft (0.56 acres)
Garage Type	Attached
Garage Area	572 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	1821 S MAIN ST
City	WALNUT CREEK
State	CA
Zip	94595-2344
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R8
Legal Description	PCL MAP 56 PG 17 PCL B
Legal Subdivision	PM 56 17
Legal Tract	56PM17
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	6
Census Block	6001
Census Tract	334200

Owner

1821 S Main St is owner-occupied and held in a trust since September 2025.

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

Owner of Record	2 Trust Names on File
Mailing Address	1821 S MAIN ST, WALNUT CREEK, CA 94595-2344
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Living 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
Sep 30, 2025	Grant Deed, Transfer · Conventional Mortgage FREMONT BANK
Mar 10, 2023	Grant Deed, Transfer LENNAR TITLE INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 30, 2025 · Amount on File
Deed Sale	Sep 30, 2025 · Amount on File
Prior Sale	Mar 10, 2023 · Amount on File
Deed Document Number	2025102106
Prior Transfer Date	Oct 30, 2007
Prior Transfer Doc	0000309951
Record Updated	Oct 29, 2026

September 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Sep 30, 2025
Property Address	1821 S MAIN ST, WALNUT CREEK, CA 94595-2344
Document Number	0000102106
Map Reference	MB 56 PG 17
Instrument Date	Sep 25, 2025
Instrument	2025- 102106
Transaction Type	Transfer
Record Updated	Oct 8, 2025
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	Tenants in Common
Address	1821 S MAIN ST, WALNUT CREEK, CA 94595-2344

Mortgage

Document Number	0000102107
Date	Sep 30, 2025
Instrument	2025- 102107

Lender

Name	FREMONT BANK
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2055

Interest

Rate Type	Adjustable Rate
Rate	6%
Adjustable	Adjustable Rate Rider
Type Change Date	Oct 1, 2030
Change Frequency	6 Months
Min Rate At Change	4%
Max Rate At Change	8%
Index	Other
Max Rate	11%

March 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 10, 2023
Property Address	1821 S MAIN ST, WALNUT CREEK, CA 94595-2344
Document Number	0000022977
Map Reference	MB 56 PG 17
Instrument Date	Feb 18, 2023
Instrument	2023-022977
Transaction Type	Transfer
Record Updated	Mar 20, 2023
Title Company	LENNAR TITLE INC

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	2576 N MAIN ST, WALNUT CREEK, CA 94597-3153

Tax Assessment & Valuation

The 2025 property tax bill for 1821 S Main St was $15,551.

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$1,361,000 (+3.93%) Land $950,000 Building $411,000
2025	$15,551.00	$1,309,551 Land $1,040,400 Building $269,151
2023	$14,882.00 (+425.12%)	$1,250,000 Land $1,000,000 Building $250,000
2022	$2,834.00

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

Flood

FEMA maps place 1821 S Main St in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone AE high risk
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	Varies along the reach; see FIRM
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on File median of 62 policies
Community Rating System	Class 8 (10% premium discount)
Nearby Flood Policies	62 in force
Nearby Flood Claims	8 (1997–2022)
Claims Outside the SFHA	1 of 8
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Dec 2022 · 5 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 1821 S Main St is low, with a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% 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 243 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Sonic Telecom Fiber	10,000 / 10,000
Xfinity Cable	2,000 / 250
Astound Broadband Cable	1,500 / 50
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20
AT&T DSL · Fiber, Fixed Wireless in parts of the area	100 / 20

May also be available: Etheric Networks.

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