Alameda County property record for 4639 James Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 2,241 sqft · built 1949 |
| Lot Size | 0.476 acres (20,740 sqft) |
| Owner | Company Name on File |
| Last Sale | $1,325,000 (Apr 2025) |
| Tax Bill | $4,474 (2025) |
| Deeds & Mortgages | Nov 2025 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-780-7 |
| Primary APN | 84C-780-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 2,241 sqft Living Area |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Construction Type | Wood |
| Lot Area | 20,740 sqft (0.476 acres) |
| Garage Type | Carport |
| Carport | Carport |
| Street Address | 4639 JAMES AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-2445 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00007 BLK: AR: 084C PAGE: 0780 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 430200 |
4639 James Ave is owned by a company that bought it in April 2025.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 4639 JAMES AVE, CASTRO VALLEY, CA 94546-2445 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
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 | Apr 17, 2025 · Amount on File |
| Deed Sale | Apr 17, 2025 · Amount on File |
| Prior Sale | Feb 14, 2005 · Amount on File |
| Deed Document Number | 202551539 |
| Prior Transfer Date | Feb 4, 1994 |
| Prior Transfer Doc | 0000223479 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4639 JAMES AVE, CASTRO VALLEY, CA 94546-2445 |
| Transaction Type | Mortgage |
| Record Updated | Dec 17, 2025 |
| Title Company | CHICAGO TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 15940 ROCHIN TER, LOS GATOS, CA 95032-4823 |
| Document Number | 0000144911 |
|---|---|
| Date | Nov 17, 2025 |
| Instrument | 2025144911 |
| Name | NMSI INC |
|---|---|
| Type | Mortgage Company |
| Address | 2975 WILSHIRE BLVD STE 600, LOS ANGELES, CA 90010 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Dec 1, 2055 |
| Rate Type | Adjustable Rate |
|---|
The 2025 property tax bill for 4639 James Ave was $4,474, up 2.5% from the year before.
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 | $1,351,500 (+342.35%) Land $405,450 Building $946,050 | ||
| 2025 | $4,474.00 (+2.52%) | $305,526 Land $205,139 Building $107,387 | |
| 2024 | $4,364.00 (+2.01%) | ||
| 2023 | $4,278.00 Homeowner's exemption | $300,392 Land $197,174 Building $103,218 | $1,235,430 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 4639 James Ave 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 May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 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 |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 3 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 4639 James 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 | Direct burnable vegetation |
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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