Contra Costa County property record for 3411 Keystone Loop, Discovery Bay, CA 94505 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4 ba · 4,011 sqft · built 2003 |
| Lot Size | 0.161 acres (7,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $360,000 (Oct 2009) |
| Tax Bill | $7,201 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 011-421-002-4 |
| Primary APN | 011-421-002-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 4,011 sqft Living Area |
| 1st Floor Area | 1,984 sqft |
| 2nd Floor Area | 2,027 sqft |
| Year Built | Built 2003 |
|---|---|
| Effective Year Built | Effective 2003 |
| Architectural Style | Cluster |
| Lot Area | 7,000 sqft (0.161 acres) |
| View / Lot | Lake |
| Garage Type | Attached |
| Garage Area | 438 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 3411 KEYSTONE LOOP |
|---|---|
| City | DISCOVERY BAY |
| State | CA |
| Zip | 94505-2320 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8430 POR LOTS 2&3 |
| Legal Subdivision | LAKESHORE 4 |
| Legal Tract | 8430 |
| Legal Lot Number | 2,3 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 304007 |
Source: Contra Costa County records · APN 011-421-002-4
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 3411 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Oct 28, 2009 · Amount on Record |
| Deed Sale | Oct 28, 2009 · Amount on Record |
| Prior Sale | Jul 13, 2009 · Amount on Record |
| Deed Document Number | 2009256996 |
| Last Transfer Date | Dec 28, 2009 |
| Transfer Doc | 0000304030 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Elementary School District | Byron Union Elementary School District (KG - 08) |
| Secondary School District | Liberty Union High School District (09 - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $473,973 (+2%) Land $59,239 Building $414,734 | |
| 2025 | $7,201.00 (+7.21%) Homeowner's exemption | $464,680 (+4.04%) Land $58,078 Building $406,602 |
| 2023 | $6,717.00 (+1.7%) Homeowner's exemption | $446,638 Land $55,824 Building $390,814 |
| 2022 | $6,605.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133040073, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Moderate |
| 500-Year Floodplain | Yes |
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 2 in force |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 483 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
May also be available at this address: Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
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