Alameda County property record for 21871 Ada St, Hayward, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,118 sqft · built 1948 |
| Lot Size | 0.145 acres (6,300 sqft) |
| Owner | Company Name on File |
| Last Sale | $249,000 (Oct 2019) |
| Tax Bill | $11,525 (2025) |
| Deeds & Mortgages | Apr 2020 Mortgage Sep 2021 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 415-90-33 |
| Primary APN | 415-90-33 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,118 sqft Living Area |
| Year Built | Built 1948 |
|---|---|
| Effective Year Built | Effective 1958 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,300 sqft (0.145 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 21871 ADA ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-6303 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00002 BLK: 0003 TR: 0871 |
| Legal Subdivision | 871 EDEN TOWNSHIP |
| Legal Tract | 0871 |
| Legal Lot Number | 2 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 431200 |
Source: Alameda County records · APN 415-90-33
Assessment roll updated August 5, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 21871 ADA ST, CASTRO VALLEY, CA 94546-6303 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Apr 09, 2020 | Deed of Trust, Mortgage · Conventional Mortgage BETTER MORTGAGE CORPORATION |
| Sep 21, 2021 | Intrafamily Transfer, Transfer · Conventional Mortgage T2 FINANCIAL LLC |
| Oct 17, 2019 | Grant Deed, Transfer · Conventional Mortgage FREMONT BANK |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Oct 17, 2019 · Amount on Record |
| Deed Sale | Oct 17, 2019 · Amount on Record |
| Prior Sale | Nov 24, 2015 · Amount on Record |
| Deed Document Number | 2019210949 |
| Last Transfer Date | Aug 26, 2021 |
| Transfer Doc | 0000316750 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 21871 ADA ST, HAYWARD, CA 94546-6303 |
| Transaction Type | Mortgage |
| Record Updated | Jul 19, 2022 |
| Title Company | TITLE365 |
| Name | Verified Name |
|---|
| Document Number | 0000078938 |
|---|---|
| Date | Apr 09, 2020 |
| Instrument | 2020078938 |
| Name | BETTER MORTGAGE CORPORATION |
|---|---|
| Type | Mortgage Company |
| Address | NEW YORK, NY 10271 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 359 Months |
| Due | Mar 01, 2050 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Sep 21, 2021 |
| Property Address | 21871 ADA ST, HAYWARD, CA 94546-6303 |
| Document Number | 0000316750 |
| Map Reference | MB 27 PG 68 |
| Instrument Date | Aug 26, 2021 |
| Instrument | 2021316750 |
| Transaction Type | Transfer |
| Record Updated | Jun 07, 2023 |
| Title Company | NEXTITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 21871 ADA ST, HAYWARD, CA 94546-6303 |
| Document Number | 0000316751 |
|---|---|
| Date | Sep 21, 2021 |
| Instrument | 2021316751 |
| Name | T2 FINANCIAL LLC |
|---|---|
| Type | Non-Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Sep 01, 2051 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Oct 17, 2019 |
| Property Address | 21871 ADA ST, HAYWARD, CA 94546-6303 |
| Document Number | 0000210949 |
| Map Reference | MB 27 PG 68 |
| Instrument Date | Sep 23, 2019 |
| Instrument | 2019210949 |
| Transaction Type | Transfer |
| Record Updated | Jul 19, 2022 |
| Title Company | NATIONAL TITLE INS OF NY |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 21871 ADA ST, CASTRO VALLEY, CA 94546-6303 |
| Document Number | 0000210950 |
|---|---|
| Date | Oct 17, 2019 |
| Instrument | 2019210950 |
| Name | FREMONT BANK |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 01, 2049 |
Source: Alameda County records · Assessment roll updated August 5, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Hayward Unified School District (KG - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $904,784 (+1.22%) Land $273,535 Building $638,249 | ||
| 2025 | $11,525.00 (+4.33%) Homeowner's exemption | $893,908 (+4.04%) Land $268,172 Building $625,736 | |
| 2023 | $11,047.00 Homeowner's exemption | $859,203 Land $257,761 Building $601,442 | $988,650 |
Source: FEMA National Flood Hazard Layer, Alameda County (06001C), as of May 25, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060014312001, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 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 |
| Flood Insurance Cost | Premium on Record median of 15 policies |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 15 in force |
| Nearby Flood Claims | 1 (1996) |
| Most Recent Claim | Dec 1996 · rainfall accumulation |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Communications, LLC. Fixed Wireless | 250 / 100 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: California Internet.
Based on FCC filings for 744 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System, water system CA0110005, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | EAST BAY MUD serves 1,468,000 people |
|---|---|
| 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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.
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