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512 Gemstone Way, Oakley, CA 94561 Property Records

Contra Costa County property record for 512 Gemstone Way, Oakley, CA 94561

Property Summary

Property TypeSingle Family Home
Details4 bd · 3 ba · 2,208 sqft · built 2023
Lot Size0.099 acres (4,298 sqft)
Owner2 Individual Names on File
Last Sale$625,000 (Feb 2024)
Tax Bill$12,070 (2025)
Deeds & MortgagesFeb 2024 Sale & Mortgage
Flood ZoneZone X (reduced by levee)
APN037-620-004-4

Property Details

APN / Parcel Number

Primary APN037-620-004-4
Alternative APN
  • 037-620-004

Interior

Bedrooms4 Beds
Full Baths3 Baths
Total Rooms9 Rooms
Stories2 Stories
Building Area2,208 sqft Living Area
1st Floor Area1,145 sqft
2nd Floor Area1,063 sqft

Exterior

Year BuiltBuilt 2023
Effective Year BuiltEffective 2024
Lot Area4,298 sqft (0.099 acres)
Garage TypeAttached
Garage Area414 sqft
Parking Spaces2 Parking Spaces

Location & Zoning

Street Address512 GEMSTONE WAY
CityOAKLEY
StateCA
Zip94561-6046
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionT9516 L4
Legal SubdivisionWOODBURY SUB #9516
Legal Tract9516
JurisdictionCONTRA COSTA CA
Township / Civil DivisionEAST CONTRA COSTA
Census Block Group1
Census Block1009
Census Tract302011

Owner

512 Gemstone Way is owned and occupied by two individuals who bought it in February 2024.

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 Record2 Individual Names on File
Mailing Address512 GEMSTONE WAY, OAKLEY, CA 94561-6046
OccupancyOwner Occupied
Owner TypeIndividual
VestingCommunity Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleFeb 28, 2024 · Amount on File
Deed SaleFeb 28, 2024 · Amount on File
Deed Document Number202418314
Record UpdatedSep 20, 2026

February 2024: Grant Deed, Subdivision Related Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateFeb 28, 2024
Property Address512 GEMSTONE WAY, OAKLEY, CA 94561-6046
Document Number0000018314
Map ReferenceMB 543 PG 36-43
Instrument DateFeb 16, 2024
Instrument2024-018314
Transaction TypeSubdivision Related Transfer
Record UpdatedMar 7, 2024
Title CompanyLENNAR TITLE

Transaction

AmountAmount on Record
DownpaymentDownpayment on Record
Loan-to-Value (LTV)LTV on Record
Tax$0.00
Amount AccuracyRounded by County
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property with Right of Survivorship
Address512 GEMSTONE WAY, OAKLEY, CA 94561-6046

Mortgage

Document Number0000018315
DateFeb 28, 2024
Instrument2024-018315
Lender
NameLENNAR MORTGAGE LLC
TypeMortgage Company
Agreement
TypeConventional Mortgage
AmountAmount on Record
Term361 Months
DueMar 1, 2054

Tax Assessment & Valuation

The 2025 property tax bill for 512 Gemstone Way was $12,070.

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityOakley City
Secondary School DistrictLiberty Union High School District (09 - 12)
Elementary School DistrictOakley Union Elementary School District (KG - 08)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$650,041 (+2%) Land $286,110 Building $363,931
2025$12,070.00$637,296 Land $280,500 Building $356,796
2023$6,779.00 (+108.58%)$232,432 Land $232,432
2022$3,250.00

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 512 Gemstone Way in Zone X, where a levee reduces flood risk.

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

FEMA Flood ZoneZone X
reduced by levee · depends on levee performance
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies7 in force

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 512 Gemstone Way is moderate, ranking above 56% 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 RiskModerate
above 56% of the US · lower than 67% of California
Wildfire Likelihood0.2% 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 SystemDIABLO WATER DISTRICT
serves 47,158 people · EPA ID CA0710007
Water SourcePurchased surface water from RANDALL-BOLD WATER TREATMENT PLANT
Last State InspectionJan 2024
Also Mapped HereCONTRA COSTA WATER DISTRICT
Lead2 ppb (2020–2022)
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 762 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
AT&T
Fiber		5,000 / 5,000
Xfinity
Cable		2,000 / 250
Unwired
Fixed Wireless		300 / 25
Verizon
Fixed Wireless		300 / 20

May also be available: T-Mobile.

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