Alameda County property record for 3818 Opal St, Oakland, CA 94609
| Property Type | Quadplex |
|---|---|
| Details | 4 bd · 4 ba · 2,706 sqft · built 1920 |
| Lot Size | 0.066 acres (2,872 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $26,826 (2025) |
| Deeds & Mortgages | Apr 2026 Sale Oct 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 12-981-25 |
| Primary APN | 12-981-25 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 11 Rooms |
| Units | 4 Units |
| Stories | 2 Stories |
| Building Area | 2,706 sqft Living Area |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1920 |
| Construction Type | Wood |
| Lot Area | 2,872 sqft (0.066 acres) |
| Street Address | 3818 OPAL ST |
|---|---|
| City | OAKLAND |
| State | CA |
| Zip | 94609-2625 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Legal Description | LOT: 00002 BLK: PM: 0314 PAGE: 0063 |
| Legal Subdivision | PARCEL MAP 9680 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | OAKLAND |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 401200 |
3818 Opal St, a quadplex, is held in a trust since September 2021.
Source: Alameda County records, as of September 22, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 3243 FAIRVIEW AVE, ALAMEDA, CA 94501-1703 |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Apr 9, 2026 | Grant Deed, Transfer NONE LISTED ON DOCUMENT |
| Oct 5, 2021 | Intrafamily Transfer, Transfer · Conventional Mortgage FLAGSTAR BANK FSB |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Sep 13, 2021 |
| Transfer Doc | 0000332621 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Apr 9, 2026 |
| Property Address | 3818 OPAL ST, OAKLAND, CA 94609-2625 |
| Document Number | 0000046984 |
| Instrument Date | Apr 9, 2026 |
| Instrument | 202646984 |
| Transaction Type | Transfer |
| Record Updated | Jul 12, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 3243 FAIRVIEW AVE, ALAMEDA, CA 94501-1703 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Oct 5, 2021 |
| Property Address | 3818 OPAL ST, OAKLAND, CA 94609-2625 |
| Document Number | 0000332621 |
| Map Reference | MB 314 PG 63&64 |
| Instrument Date | Sep 13, 2021 |
| Instrument | 2021332621 |
| Transaction Type | Transfer |
| Record Updated | Oct 22, 2021 |
| Title Company | OLD REPUBLIC TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 3243 FAIRVIEW AVE, ALAMEDA, CA 94501-1703 |
| Document Number | 0000332622 |
|---|---|
| Date | Oct 5, 2021 |
| Instrument | 2021332622 |
| Name | FLAGSTAR BANK FSB |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Nov 1, 2051 |
The 2025 property tax bill for 3818 Opal St was $26,826, up 4.1% from the year before.
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 |
|---|---|---|
| 2026 | $1,813,053 (+2%) Land $543,916 Building $1,269,137 | |
| 2025 | $26,826.00 (+4.08%) | $1,777,510 Land $533,253 Building $1,244,257 |
| 2024 | $25,775.00 (-5%) | |
| 2023 | $27,132.00 | $1,708,500 Land $512,550 Building $1,195,950 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3818 Opal St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 3818 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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