Alameda County property record for 18721 Lamson Rd, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,504 sqft · built 1960 |
| Lot Size | 1.06 acres (46,340 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,303,000 (Aug 2026) |
| Tax Bill | $18,240 (2025) |
| Deeds & Mortgages | Aug 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 84D-1168-5 |
| Primary APN | 84D-1168-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,504 sqft Living Area |
| Year Built | Built 1960 |
|---|---|
| Effective Year Built | Effective 1961 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 46,340 sqft (1.06 acres) |
| Street Address | 18721 LAMSON RD |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-2131 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00005 BLK: AR: 084D PAGE: 1168 |
| Legal Subdivision | CASTRO VLY ORCHARDS |
| Legal Lot Number | 21&22 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 430300 |
18721 Lamson Rd is owned and occupied by two individuals who bought it in August 2026.
Source: Alameda County records, as of October 13, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 18721 LAMSON RD, CASTRO VALLEY, CA 94546-2131 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Husband and Wife |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 17, 2026 · Amount on File |
| Deed Sale | Aug 17, 2026 · Amount on File |
| Deed Document Number | 2026105804 |
| Prior Transfer Date | Feb 20, 2024 |
| Prior Transfer Doc | 0000029869 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Aug 17, 2026 |
| Property Address | 18721 LAMSON RD, CASTRO VALLEY, CA 94546-2131 |
| Document Number | 0000105804 |
| Instrument Date | Aug 10, 2026 |
| Instrument | 2026105804 |
| Transaction Type | Transfer |
| Record Updated | Sep 30, 2026 |
| Title Company | REPUBLIC TITLE COMPANY, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $144,763.30 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 18721 LAMSON RD, CASTRO VALLEY, CA 94546-2131 |
| Document Number | 0000105805, |
|---|---|
| Date | Aug 17, 2026 |
| Instrument | 2026105805 |
| Name | REALTY MORTGAGE LLC |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Sep 1, 2056 |
| Rate Type | Fixed Rate |
|---|---|
| Initial Type | Fixed Rate |
| Max Rate | -1% |
The 2025 property tax bill for 18721 Lamson Rd was $18,240.
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 | $1,501,580 (+1.53%) Land $452,574 Building $1,056,006 | ||
| 2025 | $18,240.00 Homeowner's exemption | $1,479,000 Land $443,700 Building $1,035,300 | |
| 2023 | $3,352.00 Homeowner's exemption | $222,291 Land $87,427 Building $134,864 | $1,378,170 |
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 18721 Lamson Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 1 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.
Wildfire risk around 18721 Lamson Rd is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% 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 606 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Etheric Networks, GeoLinks, Unwired, Verizon.
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