Contra Costa County property record for 300 Diablo Rd, Danville, CA 94526
| Property Type | Commercial Office |
|---|---|
| Details | 1,475 sqft · built 1943 |
| Lot Size | 0.1 acres (4,356 sqft) |
| Owner | Company Name on Record |
| Last Sale | $1,425,000 (Feb 2018) |
| Tax Bill | $19,350 (2025) |
| Deeds & Mortgages | Aug 2022 Mortgage Feb 2018 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 196-210-049-9 |
| Primary APN | 196-210-049-9 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 1,475 sqft Gross Area |
| 1st Floor Area | 1,475 sqft |
| Year Built | Built 1943 |
|---|---|
| Effective Year Built | Effective 1970 |
| Lot Area | 4,356 sqft (0.1 acres) |
| Street Address | 300 DIABLO RD |
|---|---|
| City | DANVILLE |
| State | CA |
| Zip | 94526-3417 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | RO EL RIO #1 POR LOT C |
| Legal Subdivision | EL RIO RHO ADD 01 |
| Legal Lot Number | C |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3002 |
| Census Tract | 345203 |
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 | Company Name on Record |
|---|---|
| Mailing Address | 208 W EL PINTADO, DANVILLE, CA 94526-2558 |
| Owner Type | Company |
| Vesting | Company |
| Date | Document |
|---|---|
| Aug 26, 2022 | Deed of Trust, Mortgage HERITAGE BANK OF COMMERCE |
| Feb 13, 2018 | Grant Deed, Transfer WFG NATIONAL TITLE INSURANCE |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 13, 2018 · Amount on Record |
| Deed Sale | Feb 13, 2018 · Amount on Record |
| Prior Sale | Jul 29, 2016 · Amount on Record |
| Deed Document Number | 201822947 |
| Prior Transfer Date | Jun 22, 2006 |
| Prior Transfer Doc | 0000215968 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 300 DIABLO RD, DANVILLE, CA 94526-3417 |
| Transaction Type | Mortgage |
| Record Updated | Sep 28, 2023 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 208 W EL PINTADO, DANVILLE, CA 94526-2558 |
| Document Number | 0000132330 |
|---|---|
| Date | Aug 26, 2022 |
| Instrument | 2022-132330 |
| Name | HERITAGE BANK OF COMMERCE |
|---|---|
| Type | Bank |
| Address | SAN JOSE, CA 95110 |
| Amount | Amount Recorded |
|---|
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Feb 13, 2018 |
| Property Address | 300 DIABLO RD, DANVILLE, CA 94526-3417 |
| Document Number | 0000022947 |
| Instrument Date | Feb 10, 2018 |
| Instrument | 22947 |
| Transaction Type | Transfer |
| Record Updated | Feb 20, 2018 |
| Title Company | WFG NATIONAL TITLE INSURANCE |
| Amount | Amount Recorded |
|---|---|
| Tax | $1,567.50 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 208 W EL PINTADO DANVILLE CA 945262558, DANVILLE, CA 94526-2558 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Danville Town |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,653,828 (+2%) Land $812,407 Building $841,421 | |
| 2025 | $19,350.00 (+3.72%) | $1,621,401 (+4.04%) Land $796,478 Building $824,923 |
| 2023 | $18,656.00 (+3.93%) | $1,558,442 Land $765,550 Building $792,892 |
| 2022 | $17,950.00 |
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 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 5 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.
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 398 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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