Contra Costa County property record for 55 Corwin Dr, Alamo, CA 94507
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.5 ba · 2,968 sqft · built 1957 |
| Lot Size | 0.53 acres (23,086 sqft) |
| Owner | Company Name on Record |
| Last Sale | $3,050,000 (Jun 2021) |
| Tax Bill | $38,708 (2025) |
| Deeds & Mortgages | Dec 2023 Transfer Jun 2021 Sale & Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 198-140-020-1 |
| Primary APN | 198-140-020-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 2,968 sqft Living Area |
| Gross Area | 3,679 sqft |
| 1st Floor Area | 2,968 sqft |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1998 |
| Lot Area | 23,086 sqft (0.53 acres) |
| Garage Type | Attached |
| Garage Area | 711 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 55 CORWIN DR |
|---|---|
| City | ALAMO |
| State | CA |
| Zip | 94507-2140 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | HEMME SUBN POR LOT 10 .53 AC |
| Legal Subdivision | HEMME SUB |
| Legal Lot Number | 10 |
| 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 shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 55 CORWIN DR, ALAMO, CA 94507-2140 |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Dec 21, 2023 | Intrafamily Transfer, Transfer |
| Jun 18, 2021 | Grant Deed, Transfer · Conventional Mortgage GUARANTEED RATE AFFINITY LLC |
| Nov 7, 2017 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 18, 2021 · Amount on Record |
| Deed Sale | Jun 18, 2021 · Amount on Record |
| Prior Sale | Nov 22, 2013 · Amount on Record |
| Deed Document Number | 2021177220 |
| Prior Transfer Date | Oct 23, 2017 |
| Prior Transfer Doc | 0000210193 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Dec 21, 2023 |
| Property Address | 55 CORWIN DR, ALAMO, CA 94507-2140 |
| Document Number | 0000134789 |
| Map Reference | MB C PG 71 |
| Instrument Date | Dec 9, 2023 |
| Instrument | 2023-134789 |
| Transaction Type | Transfer |
| Record Updated | Jan 2, 2024 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 55 CORWIN DR, ALAMO, CA 94507-2140 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 18, 2021 |
| Property Address | 55 CORWIN DR, ALAMO, CA 94507-2140 |
| Document Number | 0000177220 |
| Map Reference | MB C PG 71 |
| Instrument Date | May 28, 2021 |
| Instrument | 2021-177220 |
| Transaction Type | Transfer |
| Record Updated | Aug 1, 2023 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 55 CORWIN DR, ALAMO, CA 94507-2140 |
| Document Number | 0000177221 |
|---|---|
| Date | Jun 18, 2021 |
| Instrument | 2021-177221 |
| Name | GUARANTEED RATE AFFINITY LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jul 1, 2051 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 7, 2017 |
| Property Address | 55 CORWIN DR, ALAMO, CA 94507-2140 |
| Document Number | 0000210193 |
| Instrument Date | Oct 23, 2017 |
| Instrument | 210193 |
| Transaction Type | Transfer |
| Record Updated | Nov 13, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 55 CORWIN DR ALAMO CA 945072140, ALAMO, CA 94507-2140 |
| Investor | Possibly a Property Investor |
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 | $3,704,043 (+7.44%) Land $2,318,568 Building $1,385,475 | |
| 2025 | $38,708.00 (+8.97%) | $3,447,415 (+8.64%) Land $2,273,106 Building $1,174,309 |
| 2023 | $35,522.00 (+0.74%) | $3,173,220 Land $2,184,840 Building $988,380 |
| 2022 | $35,261.00 |
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 |
|---|---|
| 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 52% of the US · lower than 69% of California |
|---|---|
| Wildfire Likelihood | 0.1% 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 |
Search by:
By searching, you agree to: Terms • Privacy • Disclosures