Contra Costa County property record for 1 Dianne Ct, Lafayette, CA 94549
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 3,454 sqft · built 1978 |
| Lot Size | 0.975 acres (42,480 sqft) |
| Owner | Trust Name on File |
| Last Sale | $1,450,000 (Jun 2015) |
| Tax Bill | $23,971 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 238-180-001-6 |
| Primary APN | 238-180-001-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 3,454 sqft Living Area |
| 1st Floor Area | 3,454 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 2010 |
| Architectural Style | Contemporary |
| Exterior Material | Wood Siding |
| Roof Material | Wood Shingle |
| Lot Area | 42,480 sqft (0.975 acres) |
| Garage Type | Attached |
| Garage Area | 528 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 1 DIANNE CT |
|---|---|
| City | LAFAYETTE |
| State | CA |
| Zip | 94549-5101 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 4381 LOT 1 |
| Legal Subdivision | MAP OF SUBDIVISION 4381 |
| Legal Tract | 4381 |
| Legal Lot Number | 1 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2022 |
| Census Tract | 341000 |
1 Dianne Ct is owner-occupied and held in a trust since June 2015.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 1 DIANNE CT, LAFAYETTE, CA 94549-5101 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Jun 16, 2015 · Amount on File |
| Deed Sale | Jun 16, 2015 · Amount on File |
| Prior Sale | May 25, 1995 · Amount on File |
| Deed Document Number | 2015122231 |
| Prior Transfer Date | Jan 24, 1994 |
| Prior Transfer Doc | 0000040048 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 1 Dianne Ct was $23,971 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 | 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 | $2,056,103 (+2%) Land $1,103,294 Building $952,809 | |
| 2025 | $23,971.00 Homeowner's exemption | $2,015,788 Land $1,081,661 Building $934,127 |
| 2023 | $22,669.00 (+2.67%) Homeowner's exemption | $1,892,513 Land $1,039,659 Building $852,854 |
| 2022 | $22,080.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1 Dianne Ct in Zone X, an area of minimal flood risk, though there have been 6 flood claims nearby since 1982.
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 |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 5 in force |
| Nearby Flood Claims | 6 (1982–2005) |
| Claims Outside the SFHA | 5 of 6 |
| Most Recent Claim | Dec 2005 · Severe Storms, Flooding, Mudslides, And Landslides |
| Claims by Event |
|
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.
Wildfire risk around 1 Dianne Ct 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 64% of the US · lower than 79% 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 238 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 |
May also be available: Etheric Networks.
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