Alameda County property record for 4304 Circle Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,853 sqft · built 1953 |
| Lot Size | 0.172 acres (7,470 sqft) |
| Owner | Trust Name on File |
| Last Sale | $800,000 (Sep 2016) |
| Tax Bill | $11,742 (2025) |
| Deeds & Mortgages | Mar 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-676-2-2 |
| Primary APN | 84C-676-2-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,853 sqft Living Area |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1966 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 7,470 sqft (0.172 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4304 CIRCLE AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4648 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00001 BLK: 0001 TR: 1162 |
| Legal Subdivision | CIRCLE AVENUE |
| Legal Tract | 1162 |
| Legal Block | 1 |
| Legal Lot Number | 1 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 430800 |
4304 Circle Ave is owner-occupied and held in a trust since September 2016.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 4304 CIRCLE AVE, CASTRO VALLEY, CA 94546-4648 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Sep 23, 2016 · Amount on File |
| Deed Sale | Sep 23, 2016 · Amount on File |
| Prior Sale | Oct 12, 2001 · Amount on File |
| Deed Document Number | 2016243973 |
| Prior Transfer Date | Jun 24, 1998 |
| Prior Transfer Doc | 0000222634 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4304 CIRCLE AVE, CASTRO VALLEY, CA 94546-4648 |
| Transaction Type | Mortgage |
| Record Updated | Apr 20, 2021 |
| Title Company | FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 4304 CIRCLE AVE, CASTRO VALLEY, CA 94546-4648 |
| Document Number | 0000109278 |
|---|---|
| Date | Mar 17, 2021 |
| Instrument | 2021109278 |
| Name | PROVIDENT CU |
|---|---|
| Type | Credit Union |
| Address | REDWOOD CITY, CA 94065 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Apr 1, 2051 |
The 2025 property tax bill for 4304 Circle Ave was $11,742 with a homeowner's exemption.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $940,015 (+1.25%) Land $284,104 Building $662,911 | ||
| 2025 | $11,742.00 Homeowner's exemption | $928,447 Land $278,534 Building $649,913 | |
| 2023 | $11,305.00 Homeowner's exemption | $892,400 Land $267,720 Building $624,680 | $1,053,090 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4304 Circle Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1997.
Source: FEMA National Flood Hazard Layer, effective May 25, 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 (1997) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Nov 1997 · river or lake flooding |
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 4304 Circle Ave 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 804 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 · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Etheric Networks, GeoLinks.
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