Contra Costa County property record for 20 Grumman Ct, Walnut Creek, CA 94595
| Property Type | Federal Property (Exempt) |
|---|---|
| Details | 4 bd · 2 ba · 1,949 sqft · built 1979 |
| Lot Size | 0.36 acres (15,680 sqft) |
| Owner | Company on Record |
| Flood Zone | Zone X (minimal risk) |
| APN | 184-392-038-8 |
| Primary APN | 184-392-038-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 1,949 sqft Gross Area |
| 1st Floor Area | 1,949 sqft |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1979 |
| Lot Area | 15,680 sqft (0.36 acres) |
| Garage Type | Attached |
| Garage Area | 661 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 20 GRUMMAN CT |
|---|---|
| City | WALNUT CREEK |
| State | CA |
| Zip | 94595 |
| Property Category | Public Works |
| Property Type | Public Works > Federal Property (Exempt) |
| Local Zoning Code | R10 |
| Legal Description | PCL MAP 63 PG 7 PCL C |
| Legal Tract | 63PM7 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 6 |
| Census Block | 6001 |
| Census Tract | 334200 |
Source: Contra Costa County assessment roll, 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 on Record |
|---|---|
| Mailing Address | PO BOX 23440, OAKLAND, CA 94623-0440 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Walnut Creek City |
| Secondary School District | Acalanes Union High School District (09 - 12) |
| Elementary School District | Walnut Creek Elementary School District (KG - 08) |
| Year | Assessed Value |
|---|---|
| 2026 | $750,225 (+6.12%) Land $337,768 Building $412,457 |
| 2023 | $706,957 Land $318,288 Building $388,669 |
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 62 policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 62 in force |
| Nearby Flood Claims | 8 (1997–2022) |
| Claims Outside the SFHA | 1 of 8 |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% 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 243 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Etheric Networks.
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