Contra Costa County property record for 9 Bolla Ave, Alamo, CA 94507
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 4,176 sqft · built 1953 |
| Lot Size | 0.49 acres (21,344 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $10,000 (Jun 2010) |
| Tax Bill | $21,978 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 192-142-016 |
| Primary APN | 192-142-016 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 4,176 sqft Living Area |
| 1st Floor Area | 4,176 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1980 |
| Lot Area | 21,344 sqft (0.49 acres) |
| Garage Type | Attached |
| Garage Area | 751 sqft |
| Parking Spaces | 3 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 9 BOLLA AVE |
|---|---|
| City | ALAMO |
| State | CA |
| Zip | 94507-1342 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | RO SAN RAMON POR DIV F STONE RANCH |
| Legal Subdivision | SAN RAMON RHO |
| Legal Lot Number | 59 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1007 |
| Census Tract | 346102 |
Source: Contra Costa County records, as of October 19, 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 Individual Names on File |
|---|---|
| Mailing Address | 9 BOLLA AVE, ALAMO, CA 94507-1342 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 30, 2010 · Amount on File |
| Deed Sale | Jun 30, 2010 · Amount on File |
| Prior Sale | Jun 23, 2003 · Amount on File |
| Deed Document Number | 2010131222 |
| Prior Transfer Date | Mar 23, 2004 |
| Prior Transfer Doc | 0000107738 |
| Record Updated | Oct 29, 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 | $1,978,817 (+2%) Land $945,464 Building $1,033,353 | |
| 2025 | $21,978.00 (+3.64%) Homeowner's exemption | $1,940,018 (+4.04%) Land $926,926 Building $1,013,092 |
| 2023 | $21,207.00 (+0.75%) Homeowner's exemption | $1,864,686 Land $890,933 Building $973,753 |
| 2022 | $21,050.00 |
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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 19 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 19 in force |
| Nearby Flood Claims | 8 (1987–2012) |
| Claims Outside the SFHA | 1 of 8 |
| Most Recent Claim | Oct 2012 · tidal / storm surge |
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 | Low lower than 64% of the US · lower than 78% of California |
|---|---|
| Wildfire Likelihood | 0.03% 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 194 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 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL | 100 / 20 |
5G (outdoors only) and 4G LTE
Search by:
By searching, you agree to: Terms • Privacy • Disclosures