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9521 Thunderbird Dr, San Ramon, CA 94583 Property Records

Contra Costa County property record for 9521 Thunderbird Dr, San Ramon, CA 94583

Property Summary

Property TypeSingle Family Home
Details3 bd · 2 ba · 1,899 sqft · built 1977
Lot Size0.262 acres (11,400 sqft)
OwnerTrust Name on File
Last Sale$293,000 (Aug 1994)
Tax Bill$6,100 (2025)
Deeds & MortgagesOct 2021 Transfer
Flood ZoneZone X (minimal risk)
APN210-673-007-6

Property Details

APN / Parcel Number

Primary APN210-673-007-6
Alternative APN
  • 210-673-007

Interior

Bedrooms3 Beds
Full Baths2 Baths
Total Rooms9 Rooms
Stories1 Story
Building Area1,899 sqft Living Area
Gross Area2,486 sqft
1st Floor Area1,899 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1977
Effective Year BuiltEffective 1988
Architectural StyleRanch
Exterior MaterialStucco
Construction TypeFrame
Roof MaterialWood Shingle
Lot Area11,400 sqft (0.262 acres)
Garage TypeAttached
Garage Area587 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Heating SystemForced Air with A/C
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address9521 THUNDERBIRD DR
CitySAN RAMON
StateCA
Zip94583-3617
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionTRACT 4440 LOT 37 EX MR
Legal SubdivisionSUBDIVISION 4440
Legal Tract4440
Legal Lot Number37
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group2
Census Block2005
Census Tract345103

Owner

9521 Thunderbird Dr is owner-occupied and held in a trust since September 2021.

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

Owner of RecordTrust Name on File
Mailing Address9521 THUNDERBIRD DR, SAN RAMON, CA 94583-3617
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

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

Assessor's Deed Record

Deed NamesName on Deed
Last SaleAug 30, 1994 · Amount on File
Deed SaleAug 30, 1994 · Amount on File
Deed Document Number1994216242
Last Transfer DateSep 21, 2021
Transfer Doc0000276045
Record UpdatedSep 20, 2026

October 2021: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateOct 6, 2021
Property Address9521 THUNDERBIRD DR, SAN RAMON, CA 94583-3617
Document Number0000276045
Map ReferenceMB 176 PG 37&43
Instrument DateSep 21, 2021
Instrument2021-276045
Transaction TypeTransfer
Record UpdatedJun 7, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address9521 THUNDERBIRD DR, SAN RAMON, CA 94583-3617

Tax Assessment & Valuation

The 2025 property tax bill for 9521 Thunderbird Dr was $6,100 with a homeowner's exemption.

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalitySan Ramon City
Unified School DistrictSan Ramon Valley Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$501,967 (+2%) Land $256,123 Building $245,844
2025$6,100.00 Homeowner's exemption$492,125 Land $251,101 Building $241,024
2023$5,876.00 (+0.74%) Homeowner's exemption$473,017 Land $241,351 Building $231,666
2022$5,833.00

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

Flood

FEMA maps place 9521 Thunderbird Dr in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2022.

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

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Flood Insurance CostPremium on File
median of 10 policies
Community Rating SystemClass 6 (20% premium discount)
Nearby Flood Policies10 in force
Nearby Flood Claims1 (2022)
Most Recent ClaimDec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides

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 9521 Thunderbird Dr is low, with a 0.04% annual chance of wildfire.

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

Wildfire RiskLow
lower than 67% of the US · lower than 81% of California
Wildfire Likelihood0.04% annual chance
ExposureDirect
burnable vegetation

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 SystemEAST BAY MUD
serves 1,468,000 people · EPA ID CA0110005
Water SourceSurface water
Last State InspectionDec 2021
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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 292 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 2,000
Verizon
Fixed Wireless		1,000 / 75
Unwired
Fixed Wireless		300 / 25
Etheric Networks
Fixed Wireless		250 / 100
T-Mobile
Fixed Wireless		100 / 20

May also be available: AT&T.

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