Contra Costa County property record for 9586 Alcosta Blvd, San Ramon, CA 94583
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,776 sqft · built 1985 |
| Lot Size | 0.354 acres (15,400 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $320,000 (Sep 1997) |
| Tax Bill | $7,280 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 210-751-017 |
| Primary APN | 210-751-017 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,776 sqft Living Area |
| 1st Floor Area | 2,502 sqft |
| Basement Area | 274 sqft |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1995 |
| Lot Area | 15,400 sqft (0.354 acres) |
| Garage Type | Attached |
| Garage Area | 576 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 9586 ALCOSTA BLVD |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94583-3659 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T05612 L0017 B EX MR |
| Legal Tract | 05612 |
| Legal Lot Number | 17 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3017 |
| Census Tract | 345112 |
9586 Alcosta Blvd is owner-occupied and held in a trust since September 1997.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 9586 ALCOSTA BLVD, SAN RAMON, CA 94583-3659 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
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 | Sep 8, 1997 · Amount on File |
| Deed Sale | Sep 8, 1997 · Amount on File |
| Deed Document Number | 1997163687 |
| Prior Transfer Date | Apr 8, 1996 |
| Prior Transfer Doc | 0000065578 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 9586 Alcosta Blvd was $7,280 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 | $613,096 (+2%) Land $188,914 Building $424,182 | |
| 2025 | $7,280.00 Homeowner's exemption | $601,075 Land $185,210 Building $415,865 |
| 2023 | $7,015.00 (+0.73%) Homeowner's exemption | $577,736 Land $178,019 Building $399,717 |
| 2022 | $6,964.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 9586 Alcosta Blvd 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 9586 Alcosta Blvd is low, with a 0.04% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.04% 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 156 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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