Contra Costa County property record for 100 Avalon Ct, San Ramon, CA 94582
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4 ba · 3,387 sqft · built 2004 |
| Lot Size | 0.24 acres (10,433 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,180,000 (Jun 2007) |
| Tax Bill | $24,439 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 223-330-022-3 |
| Primary APN | 223-330-022-3 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 3,387 sqft Living Area |
| 1st Floor Area | 1,744 sqft |
| 2nd Floor Area | 1,643 sqft |
| Year Built | Built 2004 |
|---|---|
| Effective Year Built | Effective 2005 |
| Lot Area | 10,433 sqft (0.24 acres) |
| Garage Type | Attached |
| Garage Area | 648 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 100 AVALON CT |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94582-5718 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8717 L419 |
| Legal Subdivision | WINDEMERE |
| Legal Tract | 8717 |
| Legal Lot Number | 419 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 2 |
| Census Block | 2000 |
| Census Tract | 355126 |
100 Avalon Ct is owned and occupied by two individuals who acquired it in December 2010.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 100 AVALON CT, SAN RAMON, CA 94582-5718 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | Jun 14, 2007 · Amount on File |
| Deed Sale | Jun 14, 2007 · Amount on File |
| Prior Sale | Apr 27, 2005 · Amount on File |
| Deed Document Number | 2007172939 |
| Last Transfer Date | Dec 10, 2010 |
| Transfer Doc | 0000284841 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 100 Avalon Ct was $24,439 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | San Ramon City |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,675,926 (+2%) Land $706,517 Building $969,409 | |
| 2025 | $24,439.00 Homeowner's exemption | $1,643,065 Land $692,664 Building $950,401 |
| 2023 | $24,379.00 (+2.2%) Homeowner's exemption | $1,579,265 Land $665,768 Building $913,497 |
| 2022 | $23,855.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 100 Avalon Ct in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 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.
Wildfire risk around 100 Avalon Ct is high, ranking above 73% of the US, with a 0.5% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 73% of the US · above 49% of California |
|---|---|
| Wildfire Likelihood | 0.5% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | DUBLIN SAN RAMON SERVICES DISTRICT serves 98,776 people · EPA ID CA0110009 |
|---|---|
| Water Source | Purchased surface water from ZONE 7 WATER AGENCY |
| Last State Inspection | Sep 2024 |
| Lead | Under 1 ppb (2023–2025) 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.
Source: FCC Broadband Data Collection, based on 327 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: T-Mobile, Verizon.
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