Contra Costa County property record for 850 Sage Dr, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,120 sqft · built 1987 |
| Lot Size | 0.94 acres (40,960 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $840,000 (Dec 2003) |
| Tax Bill | $15,170 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 365-380-006-4 |
| Primary APN | 365-380-006-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 3,120 sqft Living Area |
| 1st Floor Area | 1,779 sqft |
| Basement Area | 1,341 sqft |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1995 |
| Lot Area | 40,960 sqft (0.94 acres) |
| Garage Type | Attached |
| Garage Area | 640 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 850 SAGE DR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-5956 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | T05365 L0006 B |
| Legal Subdivision | SUBDIVISION 5365 |
| Legal Tract | 05365 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 347000 |
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 | 2 Company Names on Record |
|---|---|
| Mailing Address | 850 SAGE DR, MARTINEZ, CA 94553-5956 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 23, 2003 · Amount on Record |
| Deed Sale | Dec 23, 2003 · Amount on Record |
| Deed Document Number | 2003612951 |
| Last Transfer Date | Jun 20, 2024 |
| Transfer Doc | 0000065290 |
| Record Updated | Sep 20, 2026 |
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 | $1,239,956 (+2%) Land $580,085 Building $659,871 | |
| 2025 | $15,170.00 (+6.49%) Homeowner's exemption | $1,215,644 (+4.04%) Land $568,711 Building $646,933 |
| 2023 | $14,245.00 (+1.72%) Homeowner's exemption | $1,168,441 Land $546,628 Building $621,813 |
| 2022 | $14,004.00 |
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 | 1 in force |
| Nearby Flood Claims | 1 (1986) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1986 · Severe Storms & Flooding |
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 | High above 73% of the US · above 48% of California |
|---|---|
| Wildfire Likelihood | 0.4% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 33 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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