Contra Costa County property record for 106 Rosti, Hercules, CA 94547
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,188 sqft · built 1986 |
| Lot Size | 0.098 acres (4,275 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $5,804 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 404-061-002-6 |
| Primary APN | 404-061-002-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 2,188 sqft Living Area |
| Gross Area | 2,616 sqft |
| 1st Floor Area | 1,145 sqft |
| 2nd Floor Area | 1,043 sqft |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1987 |
| Architectural Style | Cluster |
| Lot Area | 4,275 sqft (0.098 acres) |
| Lot Dimensions | 97 ft deep x 47 ft wide |
| Garage Type | Attached |
| Garage Area | 428 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 106 ROSTI |
|---|---|
| City | HERCULES |
| State | CA |
| Zip | 94547-3735 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | T5337A L0057 B |
| Legal Tract | 5337A |
| Legal Lot Number | 0057 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2026 |
| Census Tract | 359105 |
106 Rosti is owned and occupied by an individual who acquired it in July 2013.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 106 ROSTI, HERCULES, CA 94547-3735 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
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 | Name on Deed |
|---|---|
| Last Transfer Date | Jul 18, 2013 |
| Transfer Doc | 0000185137 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 106 Rosti was $5,804 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 | Hercules City |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $323,224 (+2%) Land $69,676 Building $253,548 | |
| 2025 | $5,804.00 Homeowner's exemption | $316,887 Land $68,310 Building $248,577 |
| 2023 | $5,430.00 (+1.27%) Homeowner's exemption | $304,583 Land $65,658 Building $238,925 |
| 2022 | $5,362.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 106 Rosti in Zone X, an area of minimal flood risk.
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 Policies | 5 in force |
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.
Wildfire risk around 106 Rosti is low, with a 0.01% annual chance of wildfire.
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 | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 505 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Sonic Telecom, Unwired.
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