489 Walnut Ave, Walnut Creek, CA 94598 Property Records

Contra Costa County property record for 489 Walnut Ave, Walnut Creek, CA 94598

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,725 sqft · built 1963
Lot Size	0.217 acres (9,450 sqft)
Owner	2 Individual Names on File
Tax Bill	$4,303 (2025)
Flood Zone	Zone X (minimal risk)
APN	`140-012-010-9`

Property Details

APN / Parcel Number

Primary APN	`140-012-010-9`
Alternative APN	`140-012-010`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,725 sqft Living Area
Gross Area	2,196 sqft
1st Floor Area	1,725 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1963
Effective Year Built	Effective 1963
Architectural Style	Ranch
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Wood Shingle
Lot Area	9,450 sqft (0.217 acres)
Garage Type	Attached
Garage Area	471 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	489 WALNUT AVE
City	WALNUT CREEK
State	CA
Zip	94598-3750
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10
Legal Description	TRACT 2895 LOT 130
Legal Subdivision	WALNUT CREEK ACRES UNIT #1
Legal Tract	2895
Legal Lot Number	130
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3019
Census Tract	338302

Owner

Source: Contra Costa County records · APN 140-012-010-9

Assessment roll updated July 14, 2026 · Last verified July 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on File
Mailing Address	489 WALNUT AVE, WALNUT CREEK, CA 94598-3750
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Walnut Creek City
Unified School District	Mount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

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

Year	Tax Bill	Assessed Value
2026		$329,385 (+2%) Land $134,232 Building $195,153
2025	$4,303.00 (+4.57%) Homeowner's exemption	$322,927 (+4.04%) Land $131,600 Building $191,327
2023	$4,115.00 (+0.91%) Homeowner's exemption	$310,390 Land $126,491 Building $183,899
2022	$4,078.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133383023, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Claims	1 (1983)
Most Recent Claim	Dec 1983 · tidal / storm surge

Wildfire

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 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.

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · sampled at 428 locations within half a mile · Last verified October 2026

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Radiate Holdings Cable	1,500 / 50
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20
AT&T DSL	100 / 20

May also be available: Sonic Telecom.

Drinking Water

Source: EPA Safe Drinking Water Information System via ECHO, 2026 Q3 · EPA community water system boundaries v3.0, March 2026 · Last verified October 2026

Water System	EAST BAY MUD serves 1,468,000 people
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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.