Contra Costa County property record for 4355 Harmon Rd, El Sobrante, CA 94803
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,022 sqft · built 1951 |
| Lot Size | 0.116 acres (5,050 sqft) |
| Owner | Individual Name on File |
| Last Sale | $210,000 (Sep 2010) |
| Tax Bill | $4,642 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 435-034-015-6 |
| Primary APN | 435-034-015-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,022 sqft Living Area |
| 1st Floor Area | 1,022 sqft |
| Year Built | Built 1951 |
|---|---|
| Effective Year Built | Effective 1956 |
| Lot Area | 5,050 sqft (0.116 acres) |
| Garage Type | Attached |
| Garage Area | 252 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Central |
|---|
| Street Address | 4355 HARMON RD |
|---|---|
| City | EL SOBRANTE |
| State | CA |
| Zip | 94803-3051 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | GREEN ACRES LOT 77 |
| Legal Subdivision | GREEN ACRES |
| Legal Lot Number | 77 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 361000 |
4355 Harmon Rd is owned and occupied by an individual who acquired it in September 2014.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 4355 HARMON RD, EL SOBRANTE, CA 94803-3051 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
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 Sale | Sep 21, 2010 · Amount on File |
| Deed Sale | Sep 21, 2010 · Amount on File |
| Prior Sale | Jul 29, 2010 · Amount on File |
| Deed Document Number | 2010200191 |
| Last Transfer Date | Sep 9, 2014 |
| Transfer Doc | 0000158165 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4355 Harmon Rd was $4,642.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $274,413 (+2%) Land $169,877 Building $104,536 | |
| 2025 | $4,642.00 | $269,034 Land $166,547 Building $102,487 |
| 2023 | $4,432.00 (+1.67%) | $258,589 Land $160,081 Building $98,508 |
| 2022 | $4,359.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4355 Harmon Rd in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 1993.
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 | 2 (1993–1995) |
| Most Recent Claim | Jan 1995 · Severe Winter Storms, Flooding, Landslides, Mud Flows |
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 4355 Harmon Rd is moderate, ranking above 45% of the US, with a 0.08% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 45% of the US · lower than 73% of California |
|---|---|
| Wildfire Likelihood | 0.08% 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 | 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 546 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: T-Mobile, Unwired, Verizon.
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