Contra Costa County property record for 475 Arthur Rd, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2 ba · 2,038 sqft · built 1940 |
| Lot Size | 2.4 acres (104,544 sqft) |
| Owner | Individual Name on Record |
| Tax Bill | $3,370 (2025) |
| Deeds & Mortgages | Sep 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 380-070-001-9 |
| Primary APN | 380-070-001-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,038 sqft Living Area |
| Gross Area | 1,190 sqft |
| 1st Floor Area | 1,190 sqft |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1945 |
| Lot Area | 104,544 sqft |
| Garage Type | Attached |
| Garage Area | 495 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 475 ARTHUR RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-1458 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | RO LAS JUNTAS |
| Legal Subdivision | LAS JUNTAS RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1021 |
| Census Tract | 320001 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 487 ARTHUR RD, MARTINEZ, CA 94553-1458 |
| Owner Type | Individual |
| Vesting | Sole Owner |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Sep 14, 2017 |
| Transfer Doc | 0000173009 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 21, 2017 |
| Property Address | 475 ARTHUR RD, MARTINEZ, CA 94553-1458 |
| Document Number | 0000173009 |
| Instrument Date | Sep 14, 2017 |
| Instrument | 173009 |
| Transaction Type | Transfer |
| Record Updated | Sep 26, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Separate Estate/Property |
| Address | 487 ARTHUR RD MARTINEZ CA 945531458, MARTINEZ, CA 94553-1458 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Martinez Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $104,495 (+2%) Land $43,971 Building $60,524 | |
| 2025 | $3,370.00 (+9.56%) | $102,447 (+4.04%) Land $43,109 Building $59,338 |
| 2023 | $3,076.00 (+5.78%) | $98,471 Land $41,436 Building $57,035 |
| 2022 | $2,908.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 2 in force |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 1998 · rainfall accumulation |
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 99.2% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 497 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| 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: Astound Broadband.
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