Contra Costa County property record for 542 Hemme Ave, Alamo, CA 94507
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4.5 ba · 4,261 sqft · built 2016 |
| Lot Size | 0.92 acres (40,075 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $40,615 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 198-100-005 |
| Primary APN | 198-100-005 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 14 Rooms |
| Stories | 2 Stories |
| Building Area | 4,261 sqft Living Area |
| 1st Floor Area | 2,636 sqft |
| 2nd Floor Area | 1,625 sqft |
| Year Built | Built 2016 |
|---|---|
| Effective Year Built | Effective 2018 |
| Lot Area | 40,075 sqft (0.92 acres) |
| Garage Type | Attached |
| Garage Area | 2,231 sqft |
| Parking Spaces | 8 Parking Spaces |
| Street Address | 542 HEMME AVE |
|---|---|
| City | ALAMO |
| State | CA |
| Zip | 94507-2114 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T209PM43 PCL A |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 345204 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 542 HEMME AVE, ALAMO, CA 94507-2114 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $3,690,194 (+2%) Land $2,052,701 Building $1,637,493 | |
| 2025 | $40,615.00 (+3.58%) Homeowner's exemption | $3,617,838 (+4.04%) Land $2,012,452 Building $1,605,386 |
| 2023 | $39,212.00 (+0.75%) Homeowner's exemption | $3,477,355 Land $1,934,307 Building $1,543,048 |
| 2022 | $38,922.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 11 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 11 in force |
| Nearby Flood Claims | 5 (1993–2012) |
| Claims Outside the SFHA | 3 of 5 |
| Most Recent Claim | Dec 2012 · rainfall accumulation |
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: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 68% of the US · above 42% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Direct burnable vegetation |
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 200 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
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