Contra Costa County property record for 21 Cosso Ct, Lafayette, CA 94549
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,522 sqft · built 1915 |
| Lot Size | 0.96 acres (41,827 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $3,400,000 (Jun 2026) |
| Tax Bill | $8,144 (2025) |
| Deeds & Mortgages | Jun 2026 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 246-110-016-2 |
| Primary APN | 246-110-016-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,522 sqft Living Area |
| 1st Floor Area | 1,541 sqft |
| 2nd Floor Area | 981 sqft |
| Year Built | Built 1915 |
|---|---|
| Effective Year Built | Effective 1947 |
| Lot Area | 41,827 sqft (0.96 acres) |
| Garage Type | Attached |
| Garage Area | 700 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 21 COSSO CT |
|---|---|
| City | LAFAYETTE |
| State | CA |
| Zip | 94549-2436 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R40 |
| Legal Description | T05966 L0001 B |
| Legal Subdivision | 5966 |
| Legal Tract | 05966 |
| Legal Lot Number | 1 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 348000 |
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 | 2 Company Names on Record |
|---|---|
| Mailing Address | 1270 SUNBURST CT, WALNUT CREEK, CA 94596-6428 |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 12, 2026 · Amount on Record |
| Deed Sale | Jun 12, 2026 · Amount on Record |
| Deed Document Number | 202661779 |
| Prior Transfer Date | Jul 21, 2016 |
| Prior Transfer Doc | 0000163656 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 12, 2026 |
| Property Address | 21 COSSO CT, LAFAYETTE, CA 94549-2436 |
| Document Number | 0000061779 |
| Instrument Date | Jun 10, 2026 |
| Instrument | 202661779 |
| Transaction Type | Transfer |
| Record Updated | Jun 22, 2026 |
| Title Company | OLD REPUBLIC TITLE |
| Amount | Amount Recorded |
|---|---|
| Tax | $377,740.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 1270 SUNBURST CT, WALNUT CREEK, CA 94596-6428 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Lafayette City |
| Secondary School District | Acalanes Union High School District (09 - 12) |
| Elementary School District | Lafayette Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $693,105 (+2%) Land $300,218 Building $392,887 | |
| 2025 | $8,144.00 (+3.78%) Homeowner's exemption | $679,516 (+4.04%) Land $294,332 Building $385,184 |
| 2023 | $7,847.00 (+1.47%) Homeowner's exemption | $653,131 Land $282,903 Building $370,228 |
| 2022 | $7,733.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 5 in force |
| Nearby Flood Claims | 4 (1980–2010) |
| Claims Outside the SFHA | 2 of 4 |
| Most Recent Claim | Jan 2010 · 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 | High above 71% of the US · above 46% of California |
|---|---|
| Wildfire Likelihood | 0.4% 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 | 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 114 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 |
| AT&T DSL · Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Etheric Networks, Verizon.
5G (outdoors only) and 4G LTE
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