Contra Costa County property record for 1011 Sierra Ave, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,336 sqft · built 1927 |
| Lot Size | 0.126 acres (5,488 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $6,240 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 375-054-032-4 |
| Primary APN | 375-054-032-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,336 sqft Living Area |
| 1st Floor Area | 1,336 sqft |
| Year Built | Built 1927 |
|---|---|
| Effective Year Built | Effective 1955 |
| Lot Area | 5,488 sqft (0.126 acres) |
| Heating System | Central |
|---|
| Street Address | 1011 SIERRA AVE |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-2839 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | MARTINEZ LAND #6 POR LOTS 1 & 14, BLK 30 |
| Legal Subdivision | MARTINEZ LAND CO 06 |
| Legal Block | 30 |
| Legal Lot Number | 1,14 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2009 |
| Census Tract | 319002 |
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 | 2250 HARBOR VIEW DR, MARTINEZ, CA 94553-2746 |
| Owner Type | Company |
| Vesting | Life Tenant |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Oct 24, 2006 |
| Transfer Doc | 0000379529 |
| Record Updated | Oct 29, 2026 |
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 | $448,850 (+2%) Land $215,818 Building $233,032 | |
| 2025 | $6,240.00 (+7.27%) | $440,050 (+4.04%) Land $211,587 Building $228,463 |
| 2023 | $5,817.00 (+2.81%) | $422,965 Land $203,372 Building $219,593 |
| 2022 | $5,658.00 |
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
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 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 | 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 765 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Fiber | 1,500 / 1,500 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: T-Mobile, Verizon.
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