Alameda County property record for 2363 Mariner Square Dr, Alameda, CA 94501
| Property Type | Commercial Office |
|---|---|
| Details | 8,180 sqft · built 1980 |
| Lot Size | 0.576 acres (25,083 sqft) |
| Owner | Company Name on File |
| Last Sale | $2,800,000 (Aug 2013) |
| Tax Bill | $18,482 (2025) |
| Deeds & Mortgages | Jan 2020 Mortgage Jul 2020 Mortgage |
| Flood Zone | Zone AE (high risk) |
| APN | 74-1315-5 |
| Primary APN | 74-1315-5 |
|---|---|
| Alternative APN |
|
| Stories | 2 Stories |
|---|---|
| Building Area | 8,180 sqft Total Area |
| Year Built | Built 1980 |
|---|---|
| Effective Year Built | Effective 1980 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Fire Resistance | Wood or Wood & Steel Frame |
| Lot Area | 25,083 sqft (0.576 acres) |
| Street Address | 2363 MARINER SQUARE DR |
|---|---|
| City | ALAMEDA |
| State | CA |
| Zip | 94501-6469 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | LOT: 00001 BLK: PM: 0109 PAGE: 0013 ;LOT: 00002 BLK: PM: 0109 PAGE: 0013 ;LOT: 00003 BLK: PM: 0109 PAGE: 0013 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | ALAMEDA |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 428700 |
2363 Mariner Square Dr, a commercial property, is owned by a company that bought it in August 2013.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 43 MORAGA WAY, ORINDA, CA 94563-3050 |
| Owner Type | Company |
| Vesting | Company |
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 |
|---|---|
| Jan 22, 2020 | Deed of Trust, Mortgage · Commercial Mortgage BOSTON PRIVATE BANK & TRUST COMPANY |
| Jul 31, 2020 | Deed of Trust, Mortgage · Commercial Mortgage BOSTON PRIVATE BANK & TRUST COMPANY |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 12, 2013 · Amount on File |
| Deed Sale | Aug 12, 2013 · Amount on File |
| Deed Document Number | 2013276320 |
| Prior Transfer Date | Dec 17, 2012 |
| Prior Transfer Doc | 0000148473 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 2363 MARINER SQUARE DR, ALAMEDA, CA 94501-6469 |
| Transaction Type | Mortgage |
| Record Updated | Jul 19, 2022 |
| Title Company | OLD REPUBLIC TTL CO OAKLAND |
| Name | Verified Name |
|---|
| Document Number | 0000013650 |
|---|---|
| Date | Jan 22, 2020 |
| Instrument | 2020013650 |
| Name | BOSTON PRIVATE BANK & TRUST COMPANY |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 2363 MARINER SQUARE DR, ALAMEDA, CA 94501-6469 |
| Transaction Type | Mortgage |
| Record Updated | Jul 19, 2022 |
| Title Company | OLD REPUBLIC TITLE |
| Name | Verified Name |
|---|---|
| Address | 43 MORAGA WAY, ORINDA, CA 94563-3050 |
| Document Number | 0000183904 |
|---|---|
| Date | Jul 31, 2020 |
| Instrument | 2020183904 |
| Name | BOSTON PRIVATE BANK & TRUST COMPANY |
|---|---|
| Type | Bank |
| Address | SAN MATEO, CA 94402 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 57 Months |
| Due | Apr 1, 2025 |
The 2025 property tax bill for 2363 Mariner Square Dr was $18,482.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Municipality | Alameda City |
| Unified School District | Alameda City Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $762,694 (+2%) Land $228,808 Building $533,886 | |
| 2025 | $18,482.00 | $747,743 Land $224,323 Building $523,420 |
| 2023 | $17,971.00 | $718,713 Land $215,614 Building $503,099 |
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 2363 Mariner Square Dr in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | 10.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 39 policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 39 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 2363 Mariner Square Dr 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 163 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Google Fiber, Sail Internet.
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