Contra Costa County property record for 2100 Spanos St, Antioch, CA 94509
| Property Type | Quadplex |
|---|---|
| Details | 3,300 sqft · built 1977 |
| Lot Size | 0.248 acres (10,800 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $620,000 (Nov 2004) |
| Tax Bill | $11,875 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 074-380-002-1 |
| Primary APN | 074-380-002-1 |
|---|---|
| Alternative APN |
|
| Total Rooms | 4 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 3,300 sqft Living Area |
| 1st Floor Area | 3,300 sqft |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1978 |
| Architectural Style | Quadruplex |
| Lot Area | 10,800 sqft (0.248 acres) |
| Garage Type | Carport |
| Carport | Carport |
| Parking Spaces | 4 Parking Spaces |
| Street Address | 2100 SPANOS ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-3127 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Legal Description | T04910 L0129 B EX MR |
| Legal Tract | 04910 |
| Legal Lot Number | 129 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 307202 |
2100 Spanos St, a quadplex, is held in a trust since November 2004.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 32 LONGFELLOW RD, MILL VALLEY, CA 94941-1517 |
| 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 Sale | Nov 17, 2004 · Amount on File |
| Deed Sale | Nov 17, 2004 · Amount on File |
| Prior Sale | Jul 31, 1997 · Amount on File |
| Deed Document Number | 2004443820 |
| Prior Transfer Date | Apr 19, 1994 |
| Prior Transfer Doc | 0000147346 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 2100 Spanos St was $11,875.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Antioch City |
| Unified School District | Antioch Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $881,491 (+2%) Land $284,346 Building $597,145 | |
| 2025 | $11,875.00 | $864,208 Land $278,771 Building $585,437 |
| 2023 | $11,214.00 (+1.45%) | $830,651 Land $267,947 Building $562,704 |
| 2022 | $11,054.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 2100 Spanos St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 2100 Spanos St 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 | CITY OF ANTIOCH serves 116,781 people · EPA ID CA0710001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2024 |
| Lead | Under 1 ppb (2022–2024) 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 567 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 |
| AT&T DSL · Fixed Wireless in parts of the area | 100 / 20 |
May also be available: T-Mobile, Verizon.
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