Contra Costa County property record for 1841 Argonne Dr, Walnut Creek, CA 94598
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,630 sqft · built 1969 |
| Lot Size | 0.23 acres (10,000 sqft) |
| Owner | Company Name on File |
| Last Sale | $955,000 (Sep 2026) |
| Tax Bill | $2,703 (2025) |
| Deeds & Mortgages | Sep 2026 Sale Sep 2026 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 145-045-004-2 |
| Primary APN | 145-045-004-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,630 sqft Living Area |
| 1st Floor Area | 1,630 sqft |
| Year Built | Built 1969 |
|---|---|
| Effective Year Built | Effective 1970 |
| Lot Area | 10,000 sqft (0.23 acres) |
| Garage Type | Attached |
| Garage Area | 442 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 1841 ARGONNE DR |
|---|---|
| City | WALNUT CREEK |
| State | CA |
| Zip | 94598-1202 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10 |
| Legal Description | TRACT 3740 LOT 50 EX MR |
| Legal Subdivision | SUBDIVISION 3740 |
| Legal Tract | 3740 |
| Legal Lot Number | 50 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 338201 |
1841 Argonne Dr is owned by a company that bought it in September 2026 and is owner-occupied.
Source: Contra Costa County records, as of September 24, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 2015 MANHATTAN BEACH BLVD, 100, REDONDO BEACH, CA 90278-1230 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Sep 18, 2026 | Grant Deed, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE COMPAN |
| Sep 14, 2026 | Affidavit of Death of Trustee, Transfer |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 18, 2026 · Amount on File |
| Deed Sale | Sep 18, 2026 · Amount on File |
| Prior Sale | Dec 3, 2010 · Amount on File |
| Deed Document Number | 202698463 |
| Prior Transfer Date | Sep 8, 2026 |
| Prior Transfer Doc | 0000096606 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 18, 2026 |
| Property Address | 1841 ARGONNE DR, WALNUT CREEK, CA 94598-1202 |
| Document Number | 0000098463 |
| Instrument Date | Sep 15, 2026 |
| Instrument | 202698463 |
| Transaction Type | Transfer |
| Record Updated | Sep 24, 2026 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE COMPAN |
| Amount | Amount on Record |
|---|---|
| Tax | $106,100.50 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Limited Liability Partnership |
| Investor | Possibly a Property Investor |
| Document Type | Affidavit of Death of Trustee |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 14, 2026 |
| Property Address | 1841 ARGONNE DR, WALNUT CREEK, CA 94598-1202 |
| Document Number | 0000096606 |
| Instrument Date | Sep 8, 2026 |
| Instrument | 202696606 |
| Transaction Type | Transfer |
| Record Updated | Sep 22, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 2571 GILL PORT LN, WALNUT CREEK, CA 94598-1259 |
The 2025 property tax bill for 1841 Argonne Dr was $2,703 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 | Walnut Creek City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $181,229 (+2%) Land $77,484 Building $103,745 | |
| 2025 | $2,703.00 Homeowner's exemption | $177,676 Land $75,965 Building $101,711 |
| 2023 | $2,574.00 (+0.94%) Homeowner's exemption | $170,778 Land $73,016 Building $97,762 |
| 2022 | $2,550.00 |
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.
FEMA maps place 1841 Argonne Dr in Zone X, an area of minimal flood risk, though there have been 1 flood claim 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 7 (15% premium discount) |
| Nearby Flood Policies | 9 in force |
| Nearby Flood Claims | 1 (1982) |
| Most Recent Claim | Jan 1982 · Severe Storms, Flood, Mudslides & High Tide |
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.
The area around 1841 Argonne Dr has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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.
Source: FCC Broadband Data Collection, based on 406 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
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