Contra Costa County property record for 443 Sunhill Ln, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,481 sqft · built 1976 |
| Lot Size | 0.248 acres (10,800 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $2,509 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 161-321-006-9 |
| Primary APN | 161-321-006-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,481 sqft Living Area |
| 1st Floor Area | 1,481 sqft |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1977 |
| Lot Area | 10,800 sqft (0.248 acres) |
| Garage Type | Attached |
| Garage Area | 460 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 443 SUNHILL LN |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4227 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T04569 L0006 B |
| Legal Tract | 04569 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 320004 |
443 Sunhill Ln is owner-occupied and held in a trust since September 2015.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 443 SUNHILL LN, MARTINEZ, CA 94553-4227 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Sep 2, 2015 |
| Transfer Doc | 0000211154 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 443 Sunhill Ln was $2,509 with a homeowner'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 | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $131,805 (+2%) Land $31,901 Building $99,904 | |
| 2025 | $2,509.00 | $129,222 Land $31,276 Building $97,946 |
| 2023 | $2,423.00 (+3.68%) | $124,206 Land $30,062 Building $94,144 |
| 2022 | $2,337.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 443 Sunhill Ln in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1979.
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 |
| Nearby Flood Claims | 1 (1979) |
| Most Recent Claim | Oct 1979 · 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.
The area around 443 Sunhill Ln has no burnable land within ember reach, so its wildfire risk is not rated.
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 537 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 |
| AT&T DSL | 100 / 20 |
May also be available: Astound Broadband, T-Mobile.
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