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409 Osher Ct, Alamo, CA 94507 Property Records

Contra Costa County property record for 409 Osher Ct, Alamo, CA 94507

Property Summary

Property TypeSingle Family Home
Details4 bd · 3.5 ba · 3,415 sqft · built 1997
Lot Size0.46 acres (20,037 sqft)
OwnerTrust Name on File
Last Sale$740,000 (Nov 1997)
Tax Bill$34,613 (2025)
Deeds & MortgagesSep 2019 Transfer
Flood ZoneZone X (minimal risk)
APN187-590-004-3

Property Details

APN / Parcel Number

Primary APN187-590-004-3
Alternative APN
  • 187-590-004

Interior

Bedrooms4 Beds
Full Baths3.5 Baths
Half Baths1 Half Bath
Total Rooms12 Rooms
Stories1 Story
Building Area3,415 sqft Living Area
1st Floor Area3,415 sqft

Exterior

Year BuiltBuilt 1997
Effective Year BuiltEffective 1997
Lot Area20,037 sqft (0.46 acres)
Garage TypeAttached
Garage Area584 sqft
Parking Spaces2 Parking Spaces

Location & Zoning

Street Address409 OSHER CT
CityALAMO
StateCA
Zip94507-1494
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR20
Legal DescriptionT7818 L19
Legal SubdivisionSUBDIVISION 7818
Legal Tract7818
Legal Lot Number19
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group2
Census Block2005
Census Tract346101

Owner

409 Osher Ct is owner-occupied and held in a trust since May 2024.

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

Owner of RecordTrust Name on File
Mailing Address409 OSHER CT, ALAMO, CA 94507-1494
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 SaleNov 18, 1997 · Amount on File
Deed SaleNov 18, 1997 · Amount on File
Deed Document Number1997224784
Last Transfer DateMay 10, 2024
Transfer Doc0000046844
Record UpdatedSep 20, 2026

September 2019: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateSep 27, 2019
Property Address409 OSHER CT, ALAMO, CA 94507-1494
Document Number0000161927
Instrument DateSep 17, 2019
Instrument161927
Transaction TypeTransfer
Record UpdatedOct 15, 2019
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipRevocable Trust
Address409 OSHER CT ALAMO CA 945071494, ALAMO, CA 94507-1494

Tax Assessment & Valuation

The 2025 property tax bill for 409 Osher Ct was $34,613 with a homeowner's exemption.

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

Property Jurisdictions

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

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$2,057,285 (-32.77%) Land $1,040,182 Building $1,017,103
2025$34,613.00 Homeowner's exemption$3,060,000 Land $1,632,000 Building $1,428,000
2023$14,207.00 (+0.89%) Homeowner's exemption$1,176,736 Land $414,375 Building $762,361
2022$14,081.00

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

Flood

FEMA maps place 409 Osher Ct in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Wildfire risk around 409 Osher Ct is moderate, ranking above 59% 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 59% of the US · lower than 64% of California
Wildfire Likelihood0.2% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 329 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 250
Astound Broadband
Cable		1,500 / 50
Unwired
Fixed Wireless		300 / 25
Verizon
Fixed Wireless		300 / 20
AT&T
DSL		100 / 20

May also be available: Etheric Networks.

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