Contra Costa County property record for 3429 Keystone Loop, Discovery Bay, CA 94505 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 4 Baths |
| Year Built | Built 2010 |
| Square Footage | 4,285 sqft Living Area |
| Lot Size | 7,200 sqft (0.165 acres) |
| Garage | Attached, 518 sqft |
| Last Sale | $855,000 (2023) |
| Tax Bill | $12,562.00 (2025) |
| Primary APN | 011-421-005-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 12 Rooms |
| Building Area | 4,285 sqft Living Area |
| 1st Floor | 2,188 sqft 1st Floor |
| 2nd Floor | 2,097 sqft 2nd Floor |
| Stories | 2 Stories |
| Year Built | Built 2003 |
|---|---|
| Effective Year Built | Effective 2010 |
| Architectural Style | Cluster Style |
| Lot Area | 7,200 sqft (0.165 acres) |
| Parking Spaces | 2 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 518 sqft Garage |
| Cooling System | Central Cooling |
|---|
| Street Address | 3429 KEYSTONE LOOP |
|---|---|
| City | DISCOVERY BAY |
| State | CA |
| Zip | 94505-2320 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | T8430 POR LOTS 5&6 |
| Legal Subdivision | SUBDIVISION 8430 |
| Legal Tract | 8430 |
| Legal Lot Number | 5,6 |
| Jurisdiction | CONTRA COSTA CA |
| Minor Civil Division | EAST CONTRA COSTA |
| Census Blockgroup | 3 |
| Census Block | 3001 |
| Census Tract | 304007 |
Source: Contra Costa County records · APN 011-421-005-7
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 Company Names on File |
|---|---|
| Mailing Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Owner Type | Owner is a Company |
| Vesting | Owner is a Trust, Trust |
| Date | Document |
|---|---|
| Oct 15, 2021 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Apr 20, 2023 | Grant Deed, Transfer · Conventional Mortgage BAY EQUITY LLC |
| Nov 01, 2019 | Intrafamily Transfer, Transfer · Conventional Mortgage GUARANTEED RATE INC |
| Nov 01, 2019 | Grant Deed, Transfer · Conventional Mortgage GUARANTEED RATE |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Apr 20, 2023 · Amount on Record |
| Deed Sale | Apr 20, 2023 · Amount on Record |
| Prior Sale | Nov 01, 2019 · Amount on Record |
| Deed Doc Number | 202336695 |
| Prior Transfer Date | Oct 25, 2019 |
| Prior Transfer Doc | 0000194394 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Transaction Type | Mortgage |
| Record Updated | Jun 15, 2023 |
| Title Company | CHICAGO TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 3429 KEYSTONE LOOP, BYRON, CA 94505-2320 |
| Document Number | 0000285102 |
|---|---|
| Date | Oct 15, 2021 |
| Instrument | 2021-285102 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | PONTIAC, MI 48341 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 01, 2051 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Apr 20, 2023 |
| Property Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Document Number | 0000036695 |
| Map Reference | DOC 2002-262657 |
| Instrument Date | Apr 12, 2023 |
| Instrument | 2023-036695 |
| Transaction Type | Transfer |
| Record Updated | Jun 07, 2023 |
| Title Company | OLD REPUBLIC TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded Values by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Document Number | 0000036696 |
|---|---|
| Date | Apr 20, 2023 |
| Instrument | 2023-036696 |
| Name | BAY EQUITY LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 01, 2053 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 01, 2019 |
| Property Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Document Number | 0000194394 |
| Map Reference | MB 436 PG 17 |
| Instrument Date | Oct 25, 2019 |
| Instrument | 2019-194394 |
| Transaction Type | Transfer |
| Record Updated | Nov 03, 2022 |
| Title Company | FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Document Number | 0000194395 |
|---|---|
| Date | Nov 01, 2019 |
| Instrument | 2019-194395 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Non-Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Nov 01, 2049 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 01, 2019 |
| Property Address | 3429 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320 |
| Document Number | 0000194393 |
| Instrument Date | Oct 23, 2019 |
| Instrument | 194393 |
| Transaction Type | Transfer |
| Record Updated | Nov 13, 2019 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $698.50 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Separate Estate/Property |
| Address | 3429 KEYSTONE LOOP DISCOVERY BAY CA 945052320, DISCOVERY BAY, CA 94505-2320 |
| Document Number | 194395 |
|---|---|
| Date | Nov 01, 2019 |
| Instrument | 194395 |
| Name | GUARANTEED RATE |
|---|---|
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Oct 31, 2049 |
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 | $965,595 (+2%) Land $132,651 Building $832,944 | |
| 2025 | $12,562.00 (+37.77%) | $946,662 (+41.82%) Land $130,050 Building $816,612 |
| 2023 | $9,118.00 (+1.67%) Homeowner's exemption | $667,496 Land $157,676 Building $509,820 |
| 2022 | $8,968.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Moderate |
| 500-Year Floodplain | Yes |
| Special Flood Hazard Area | No |
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| 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; lenders make the official flood determination.
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