Contra Costa County property record for 521 40th St, Richmond, CA 94805
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,053 sqft · built 1942 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $7,342 (2025) |
| Deeds & Mortgages | Jan 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 517-030-006-4 |
| Primary APN | 517-030-006-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,053 sqft Living Area |
| 1st Floor Area | 967 sqft |
| 2nd Floor Area | 1,086 sqft |
| Year Built | Built 1942 |
|---|---|
| Effective Year Built | Effective 1952 |
| Lot Area | 5,000 sqft (0.115 acres) |
| Lot Dimensions | 100 ft deep x 50 ft wide |
| Garage Type | Attached |
| Garage Area | 233 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 521 40TH ST |
|---|---|
| City | RICHMOND |
| State | CA |
| Zip | 94805-1807 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | SPAULD RICH PULL TWNST LOTS 9&10 BLK 26 |
| Legal Subdivision | SPAULDING RICHMOND |
| Legal Block | 26 |
| Legal Lot Number | 9,10 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4004 |
| Census Tract | 371000 |
521 40th St is owned and occupied by two individuals who acquired it in January 2021.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 521 40TH ST, RICHMOND, CA 94805-1807 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Jan 12, 2021 |
| Deed Sale | Jan 12, 2021 |
| Prior Sale | Feb 7, 2003 |
| Deed Document Number | 20219505 |
| Prior Transfer Date | Dec 21, 2020 |
| Prior Transfer Doc | 0000009505 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jan 12, 2021 |
| Property Address | 521 40TH ST, RICHMOND, CA 94805-1807 |
| Document Number | 0000009505 |
| Map Reference | MB 4 PG 80 |
| Instrument Date | Dec 21, 2020 |
| Instrument | 2021-009505 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | TITLE365 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 521 40TH ST, RICHMOND, CA 94805-1807 |
| Document Number | 0000009506 |
|---|---|
| Date | Jan 12, 2021 |
| Instrument | 2021-009506 |
| Name | NATIONSTAR MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | VA Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 300 Months |
| Due | Jan 1, 2046 |
The 2025 property tax bill for 521 40th St was $7,342.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Richmond City |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $413,872 (+2%) Land $171,336 Building $242,536 | |
| 2025 | $7,342.00 | $405,758 Land $167,977 Building $237,781 |
| 2023 | $7,101.00 (+1.92%) | $390,004 Land $161,455 Building $228,549 |
| 2022 | $6,967.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 521 40th St in Zone X, an area of minimal flood risk.
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 10 (0% premium discount) |
| Nearby Flood Policies | 1 in force |
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 521 40th St 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 | 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 949 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Etheric Networks, GeoLinks.
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