Alameda County property record for 20048 Sapphire St, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,596 sqft · built 1949 |
| Lot Size | 0.14 acres (6,116 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $982,000 (Jun 2026) |
| Tax Bill | $1,910 (2025) |
| Deeds & Mortgages | Jun 2026 Sale & Mortgage May 2018 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-1064-80 |
| Primary APN | 84C-1064-80 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,596 sqft Living Area |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1953 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,116 sqft (0.14 acres) |
| Street Address | 20048 SAPPHIRE ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4728 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00002 BLK: 0003 TR: 0799 |
| Legal Subdivision | TR 799 |
| Legal Tract | 0799 |
| Legal Block | 3 |
| Legal Lot Number | 2 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 430800 |
Source: Alameda County records, as of August 5, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 20048 SAPPHIRE ST, CASTRO VALLEY, CA 94546-4728 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Husband and Wife |
| Date | Document |
|---|---|
| Jun 9, 2026 | Grant Deed, Transfer · Conventional Mortgage NEW WAVE LENDING GROUP INC |
| May 22, 2018 | Affidavit of Death, Transfer ATTORNEY ONLY |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 9, 2026 · Amount on Record |
| Deed Sale | Jun 9, 2026 · Amount on Record |
| Deed Document Number | 202675672 |
| Prior Transfer Date | May 2, 2001 |
| Prior Transfer Doc | 0000234261 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Jun 9, 2026 |
| Property Address | 20048 SAPPHIRE ST, CASTRO VALLEY, CA 94546-4728 |
| Document Number | 0000075672 |
| Instrument Date | May 28, 2026 |
| Instrument | 202675672 |
| Transaction Type | Transfer |
| Record Updated | Jul 22, 2026 |
| Title Company | CHICAGO TITLE W, CHICAGO TITLE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $109,100.20 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 20048 SAPPHIRE ST, CASTRO VALLEY, CA 94546-4728 |
| Document Number | 0000075673, |
|---|---|
| Date | Jun 9, 2026 |
| Instrument | 202675673 |
| Name | NEW WAVE LENDING GROUP INC |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Jul 1, 2056 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 6.23% |
| Initial Type | Fixed Rate |
| Max Rate | -1% |
| Document Type | Affidavit of Death |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | May 22, 2018 |
| Property Address | 20048 SAPPHIRE ST, CASTRO VALLEY, CA 94546-4728 |
| Document Number | 0000101367 |
| Instrument Date | May 9, 2018 |
| Instrument | 101367 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2018 |
| Title Company | ATTORNEY ONLY |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 20048 SAPPHIRE ST CASTRO VALLEY CA 945464728, CASTRO VALLEY, CA 94546-4728 |
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 | $890,000 (+909.15%) Land $267,000 Building $623,000 | ||
| 2025 | $1,910.00 (+3.13%) | $88,193 (-3.61%) Land $42,048 Building $53,145 | |
| 2024 | $1,852.00 (+3%) | ||
| 2023 | $1,798.00 Homeowner's exemption | $91,496 Land $40,415 Building $51,081 | $1,067,760 |
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.
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 66% of the US · lower than 80% of California |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | None beyond 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 442 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Etheric Networks, GeoLinks, Sonic Telecom, T-Mobile, Unwired.
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