Alameda County property record for 2135 173rd Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.5 ba · 1,245 sqft · built 1954 |
| Lot Size | 0.094 acres (4,081 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $717,000 (Mar 2026) |
| Tax Bill | $1,779 (2025) |
| Deeds & Mortgages | Mar 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 80A-234-13-2 |
| Primary APN | 80A-234-13-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,245 sqft Living Area |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1955 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 4,081 sqft (0.094 acres) |
| Street Address | 2135 173RD AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3811 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00002 BLK: 0013 AR: 080A PAGE: 0234 |
| Legal Subdivision | EL PORTAL |
| Legal Lot Number | 512 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3018 |
| Census Tract | 430500 |
Source: Alameda County records, as of July 1, 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 | 2135 173RD AVE, CASTRO VALLEY, CA 94546-3811 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 31, 2026 · Amount on Record |
| Deed Sale | Mar 31, 2026 · Amount on Record |
| Deed Document Number | 202641748 |
| Prior Transfer Date | Mar 24, 2026 |
| Prior Transfer Doc | 0000041747 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Mar 31, 2026 |
| Property Address | 2135 173RD AVE, CASTRO VALLEY, CA 94546-3811 |
| Document Number | 0000041748 |
| Map Reference | MB 8 PG 76 & 77 |
| Instrument Date | Mar 25, 2026 |
| Instrument | 2026041748 |
| Transaction Type | Transfer |
| Record Updated | May 20, 2026 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $788.70 |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 2135 173RD AVE, CASTRO VALLEY, CA 94546-3811 |
| Document Number | 0000041749 |
|---|---|
| Date | Mar 31, 2026 |
| Instrument | 2026041749 |
| Name | NEW AMERICAN FUNDING |
|---|---|
| Type | Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 1, 2056 |
Source: Alameda County assessment roll, as of June 20, 2025
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | San Lorenzo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $1,779.00 (+5.39%) Homeowner's exemption | $76,605 (-4.67%) Land $36,041 Building $47,564 | |
| 2024 | $1,688.00 (-0.71%) | ||
| 2023 | $1,700.00 Homeowner's exemption | $80,358 Land $34,641 Building $45,717 | $678,960 |
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 | 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 796 locations within half a mile, as of December 31, 2025
| 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 |
May also be available: Etheric Networks, GeoLinks, T-Mobile, Unwired, Verizon.
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