Alameda County property record for 4140 Opal St, Oakland, CA 94609
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,525 sqft · built 1914 |
| Lot Size | 0.097 acres (4,218 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $605,000 (Nov 2008) |
| Tax Bill | $13,209 (2025) |
| Deeds & Mortgages | Jul 2022 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 12-1004-32 |
| Primary APN | 12-1004-32 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,525 sqft Living Area |
| Year Built | Built 1914 |
|---|---|
| Effective Year Built | Effective 1929 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 4,218 sqft (0.097 acres) |
| Garage Type | Carport |
| Carport | Carport |
| Parking Spaces | 1 Parking Space |
| Street Address | 4140 OPAL ST |
|---|---|
| City | OAKLAND |
| State | CA |
| Zip | 94609-2618 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00032 BLK: AR: 0012 PAGE: 1004 |
| Legal Subdivision | ALTON PARK |
| Legal Block | C |
| Legal Lot Number | 19 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | OAKLAND |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 401200 |
4140 Opal St is owned and occupied by two individuals who bought it in November 2008.
Source: Alameda County records, as of September 28, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4140 OPAL ST, OAKLAND, CA 94609-2618 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
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 4, 2008 · Amount on File |
| Deed Sale | Nov 4, 2008 · Amount on File |
| Prior Sale | Jun 30, 2000 · Amount on File |
| Deed Document Number | 2008322652 |
| Prior Transfer Date | Apr 30, 1997 |
| Prior Transfer Doc | 0000099780 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4140 OPAL ST, OAKLAND, CA 94609-2618 |
| Transaction Type | Mortgage |
| Record Updated | Aug 5, 2022 |
| Title Company | WFG LENDER SERVICES |
| Name | Verified Name |
|---|---|
| Address | 4140 OPAL ST, OAKLAND, CA 94609-2618 |
| Document Number | 0000127505 |
|---|---|
| Date | Jul 14, 2022 |
| Instrument | 2022127505 |
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Address | TAMPA, FL 33634 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 4140 Opal St was $13,209 with a homeowner's exemption.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Municipality | Oakland City |
| Unified School District | Oakland Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $888,904 (+1.2%) Land $238,385 Building $657,519 | ||
| 2025 | $13,209.00 Homeowner's exemption | $878,340 Land $233,712 Building $644,628 | |
| 2023 | $11,985.00 Homeowner's exemption | $748,795 Land $224,638 Building $524,157 | $1,140,480 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4140 Opal St in Zone X, an area of minimal flood risk.
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 Policies | 1 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.
The area around 4140 Opal 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 | 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 808 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: GeoLinks, Google Fiber.
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