Contra Costa County property record for 521 Iris Ln, San Ramon, CA 94582
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,375 sqft · built 1992 |
| Lot Size | 0.169 acres (7,345 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $585,000 (Jul 1998) |
| Tax Bill | $11,579 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 217-401-021-1 |
| Primary APN | 217-401-021-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 3,375 sqft Living Area |
| 1st Floor Area | 1,730 sqft |
| 2nd Floor Area | 1,645 sqft |
| Year Built | Built 1992 |
|---|---|
| Effective Year Built | Effective 1992 |
| Lot Area | 7,345 sqft (0.169 acres) |
| Garage Type | Attached |
| Garage Area | 588 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 521 IRIS LN |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94582-5539 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7015 L59 |
| Legal Subdivision | WEST BRANCH |
| Legal Tract | 7015 |
| Legal Lot Number | 59 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 355121 |
Source: Contra Costa County records, 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 | 2 Company Names on Record |
|---|---|
| Mailing Address | 521 IRIS LN, SAN RAMON, CA 94582-5539 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 9, 1998 · Amount on Record |
| Deed Sale | Jul 9, 1998 · Amount on Record |
| Deed Document Number | 1998158517 |
| Last Transfer Date | Aug 21, 2000 |
| Transfer Doc | 0000220625 |
| 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 | San Ramon City |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $935,439 (+2%) Land $335,795 Building $599,644 | |
| 2025 | $11,579.00 (+4.16%) Homeowner's exemption | $917,098 (+4.04%) Land $329,211 Building $587,887 |
| 2023 | $11,117.00 (+0.94%) Homeowner's exemption | $881,487 Land $316,428 Building $565,059 |
| 2022 | $11,013.00 |
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
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 53% of the US · lower than 68% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 290 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: T-Mobile.
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