Contra Costa County property record for 9 Corwin Dr, Alamo, CA 94507 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.5 ba · 3,548 sqft · built 1957 |
| Lot Size | 0.5 acres (21,780 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,755,000 (Sep 2010) |
| Tax Bill | $26,021 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 198-131-007-9 |
| Primary APN | 198-131-007-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 3,548 sqft Living Area |
| Gross Area | 4,060 sqft |
| 1st Floor Area | 3,548 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 2000 |
| Architectural Style | Ranch |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 21,780 sqft (0.5 acres) |
| View / Lot | Woodland |
| Garage Type | Attached |
| Garage Area | 512 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Forced Air with A/C |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 9 CORWIN DR |
|---|---|
| City | ALAMO |
| State | CA |
| Zip | 94507-2103 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | RO SAN RAMON POR HEMME SUBN .50 AC |
| Legal Subdivision | HEMME |
| Legal Lot Number | 11,12 |
| 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 · APN 198-131-007-9
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 9 CORWIN DR, ALAMO, CA 94507-2103 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Sep 02, 2010 · Amount on Record |
| Deed Sale | Sep 02, 2010 · Amount on Record |
| Prior Sale | Jun 21, 2002 · Amount on Record |
| Deed Document Number | 2010185558 |
| Last Transfer Date | Aug 03, 2012 |
| Transfer Doc | 0000197640 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $2,352,587 (+2%) Land $967,026 Building $1,385,561 | |
| 2025 | $26,021.00 (+3.6%) | $2,306,459 (+4.04%) Land $948,065 Building $1,358,394 |
| 2023 | $25,116.00 (+0.74%) | $2,216,898 Land $911,251 Building $1,305,647 |
| 2022 | $24,932.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133452042, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Flood Insurance Cost | Premium on Record median of 11 individual NFIP policies nearby |
| 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 |
| Wildfire Risk | Moderate above 53% of the US · above 31% of California |
|---|---|
| Wildfire Likelihood | About 1 in 752 per year |
| Exposure | Direct burnable vegetation at the parcel |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 200 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| AT&T | Fiber | 5,000 / 5,000 |
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| Verizon | Fixed Wireless | 300 / 20 |
| AT&T | DSL | 100 / 20 |
Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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