Contra Costa County property record for 445 Richardson St, Martinez, CA 94553
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,774 sqft · built 1978 |
| Lot Size | 0.12 acres (5,225 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $760,000 (Oct 2023) |
| Tax Bill | $8,612 (2025) |
| Deeds & Mortgages | Oct 2023 Sale & Mortgage Nov 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 373-231-007-7 |
| Primary APN | 373-231-007-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,774 sqft Living Area |
| 1st Floor Area | 1,774 sqft |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Duplex Single |
| Lot Area | 5,225 sqft (0.12 acres) |
| Garage Type | Attached |
| Garage Area | 676 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 445 RICHARDSON ST |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-1043 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | ORIGINAL SURVEY LOT 5 POR 4 BLK 8 |
| Legal Subdivision | MARTINEZ |
| Legal Block | 8 |
| Legal Lot Number | 5 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1025 |
| Census Tract | 316000 |
445 Richardson St, a duplex, is owned and occupied by two individuals who bought it in October 2023.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 445 RICHARDSON ST, MARTINEZ, CA 94553-1043 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Oct 20, 2023 | Grant Deed, Transfer · VA Mortgage NAVY FCU |
| Nov 27, 2017 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 20, 2023 · Amount on File |
| Deed Sale | Oct 20, 2023 · Amount on File |
| Deed Document Number | 2023103256 |
| Prior Transfer Date | Nov 21, 2017 |
| Prior Transfer Doc | 0000221806 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Oct 20, 2023 |
| Property Address | 445 RICHARDSON ST, MARTINEZ, CA 94553-1043 |
| Document Number | 0000103256 |
| Instrument Date | Oct 11, 2023 |
| Instrument | 2023-103256 |
| Transaction Type | Transfer |
| Record Updated | Oct 31, 2023 |
| Title Company | CHICAGO TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 445 RICHARDSON ST, MARTINEZ, CA 94553-1043 |
| Document Number | 0000103257 |
|---|---|
| Date | Oct 20, 2023 |
| Instrument | 2023-103257 |
| Name | NAVY FCU |
|---|---|
| Type | Credit Union |
| Type | VA Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Nov 1, 2053 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 27, 2017 |
| Property Address | 445 RICHARDSON ST, MARTINEZ, CA 94553-1043 |
| Document Number | 0000221806 |
| Instrument Date | Nov 21, 2017 |
| Instrument | 221806 |
| Transaction Type | Transfer |
| Record Updated | Dec 1, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 455 RICHARDSON ST MARTINEZ CA 945531043, MARTINEZ, CA 94553-1043 |
The 2025 property tax bill for 445 Richardson St was $8,612 with a veteran's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Martinez City |
| Unified School District | Martinez Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $790,704 (+2%) Land $478,584 Building $312,120 | |
| 2025 | $8,612.00 Disabled Person's exemption Veteran's exemption | $775,200 Land $469,200 Building $306,000 |
| 2023 | $3,430.00 (-0.87%) Homeowner's exemption | $169,760 Land $39,160 Building $130,600 |
| 2022 | $3,460.00 |
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.
FEMA maps place 445 Richardson St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AO, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 42 policies |
| Nearby Flood Policies | 42 in force |
| Nearby Flood Claims | 20 (1982–2017) |
| Claims Outside the SFHA | 4 of 20 |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, And Mudslides |
| Claims by Event |
|
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 risk around 445 Richardson St is moderate, ranking above 58% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 58% of the US · lower than 65% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect within ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CITY OF MARTINEZ serves 31,015 people · EPA ID CA0710006 |
|---|---|
| Water Source | Purchased surface water from CONTRA COSTA WATER DISTRICT |
| Last State Inspection | Oct 2025 |
| Lead | Under 1 ppb (2023–2025) action level 15 ppb |
| 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, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 371 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Astound Broadband Fiber · Cable in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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