1. Home
  2. California
  3. Contra Costa County
  4. Richmond
  5. Mount St

431 Mount St, Richmond, CA 94805 Property Records

Contra Costa County property record for 431 Mount St, Richmond, CA 94805

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 2,342 sqft · built 1954
Lot Size0.121 acres (5,270 sqft)
Owner2 Individual Names on File
Last Sale$535,000 (Oct 2016)
Tax Bill$10,328 (2025)
Deeds & MortgagesJan 2021 Transfer
Jan 2021 Transfer
Flood ZoneZone X (minimal risk)
APN519-231-016-6

Property Details

APN / Parcel Number

Primary APN519-231-016-6
Alternative APN
  • 519-231-016

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms8 Rooms
Stories1 Story
Building Area2,342 sqft Living Area
1st Floor Area1,705 sqft
Basement Area637 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1954
Effective Year BuiltEffective 1958
Architectural StyleRanch
Lot Area5,270 sqft (0.121 acres)
Garage TypeAttached
Garage Area448 sqft
Parking Spaces2 Parking Spaces
PorchPorch

Utilities, Heating & Cooling

Heating SystemForced Air with A/C

Location & Zoning

Street Address431 MOUNT ST
CityRICHMOND
StateCA
Zip94805-2405
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR1
Legal DescriptionRICH TRAFFIC CTR POR LOT 1 BLK 13
Legal SubdivisionRICHMOND TRAFFIC CE
Legal Block13
Legal Lot Number1
JurisdictionCONTRA COSTA CA
Township / Civil DivisionWEST CONTRA COSTA
Census Block Group3
Census Block3012
Census Tract370000

Owner

431 Mount St is owned and occupied by two individuals who bought it in October 2016.

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

Owner of Record2 Individual Names on File
Mailing Address431 MOUNT ST, RICHMOND, CA 94805-2405
OccupancyOwner Occupied
Owner TypeIndividual
VestingTenants in Common

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

DateDocument
Jan 8, 2021Affidavit of Death, Transfer
ATTORNEY ONLY
Jan 22, 2021Quit Claim Deed, Transfer
ATTORNEY ONLY

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleOct 7, 2016 · Amount on File
Deed SaleOct 7, 2016 · Amount on File
Prior SaleApr 6, 1994 · Amount on File
Deed Document Number2016209520
Prior Transfer DateJul 22, 2004
Prior Transfer Doc0000287145
Record UpdatedOct 29, 2026

January 2021: Affidavit of Death, Transfer

Document TypeAffidavit of Death
JurisdictionCONTRA COSTA CA
Recording DateJan 8, 2021
Property Address431 MOUNT ST, RICHMOND, CA 94805-2405
Document Number0000006702
Instrument DateJan 2, 2021
Instrument6702
Transaction TypeTransfer
Record UpdatedJan 20, 2021
Title CompanyATTORNEY ONLY

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address4096 MOUNTAIN VIEW LN VACAVILLE CA 956889515, VACAVILLE, CA 95688-9515

January 2021: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateJan 22, 2021
Property Address431 MOUNT ST, RICHMOND, CA 94805-2405
Document Number0000021177
Instrument DateJan 2, 2021
Instrument21177
Transaction TypeTransfer
Record UpdatedFeb 3, 2021
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipTenants in Common
Address4096 MOUNTAIN VIEW LN VACAVILLE CA 956889515, VACAVILLE, CA 95688-9515

Tax Assessment & Valuation

The 2025 property tax bill for 431 Mount St was $10,328 with a homeowner's exemption.

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityRichmond City
Unified School DistrictWest Contra Costa Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$633,324 (+2%) Land $414,325 Building $218,999
2025$10,328.00 Homeowner's exemption$620,906 Land $406,201 Building $214,705
2023$9,959.00 (+1.72%) Homeowner's exemption$596,798 Land $390,429 Building $206,369
2022$9,791.00

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

Flood

FEMA maps place 431 Mount St 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 431 Mount 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 RiskLow
lower than 80% of the US · lower than 88% of California
Wildfire Likelihood0.01% annual chance
ExposureNone
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 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 637 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Sonic Telecom
Fiber		10,000 / 10,000
AT&T
Fiber · Fixed Wireless, DSL in parts of the area		5,000 / 5,000
Xfinity
Cable		2,000 / 250
Unwired
Fixed Wireless		300 / 25
Verizon
Fixed Wireless		300 / 20
T-Mobile
Fixed Wireless		100 / 20

May also be available: Etheric Networks, GeoLinks.

Nearby Properties on Mount St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures