Contra Costa County property record for 3850 Adelaide Dr, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,221 sqft · built 1953 |
| Lot Size | 0.177 acres (7,700 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $550,000 (Mar 2025) |
| Tax Bill | $4,427 (2025) |
| Deeds & Mortgages | May 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 161-231-044-9 |
| Primary APN | 161-231-044-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,221 sqft Living Area |
| 1st Floor Area | 1,221 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1954 |
| Lot Area | 7,700 sqft (0.177 acres) |
| Street Address | 3850 ADELAIDE DR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3005 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | VINE HILL VILLAGE LOT 40 |
| Legal Subdivision | VINE HILL VILLAGE |
| Legal Lot Number | 40 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2014 |
| Census Tract | 320001 |
Source: Contra Costa County records, as of August 18, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 3850 ADELAIDE DR, MARTINEZ, CA 94553-3005 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 13, 2025 · Amount on Record |
| Deed Sale | Mar 13, 2025 · Amount on Record |
| Deed Document Number | 202523663 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 3850 ADELAIDE DR, MARTINEZ, CA 94553-3005 |
| Document Number | 0000093766 |
| Instrument Date | May 12, 2020 |
| Transaction Type | Mortgage |
| Record Updated | May 28, 2020 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 16950 SONSHINE LN SUTTER CREEK CA 956859500, SUTTER CREEK, CA 95685-9500 |
| Document Number | 0000093766 |
|---|---|
| Date | May 18, 2020 |
| Instrument | 93766 |
| Name | SAN JOAQUIN POWER EMPS CU |
|---|---|
| Type | Credit Union |
| Address | FRESNO, CA 93711 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 180 Months |
| Due | May 17, 2035 |
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 | $561,000 (+98.03%) Land $387,600 Building $173,400 | |
| 2025 | $4,427.00 (+7.58%) | $283,287 (+4.04%) Land $122,433 Building $160,854 |
| 2023 | $4,115.00 (+3.21%) | $272,288 Land $117,680 Building $154,608 |
| 2022 | $3,987.00 |
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.
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 A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 22 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 22 in force |
| Nearby Flood Claims | 11 (1986–2022) |
| Claims Outside the SFHA | 2 of 11 |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land 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 | 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 208 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Fiber · Cable in parts of the area | 1,500 / 1,500 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
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