Contra Costa County property record for 2355 Mount Diablo St, Concord, CA 94520
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,626 sqft · built 1970 |
| Lot Size | 1.81 acres (79,279 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $4,310 (2025) |
| Deeds & Mortgages | Dec 2021 Mortgage Jun 2018 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 195-310-018-5 |
| Primary APN | 195-310-018-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,626 sqft Living Area |
| 1st Floor Area | 2,626 sqft |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1971 |
| Lot Area | 79,279 sqft |
| Garage Type | Attached |
| Garage Area | 429 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 2355 MOUNT DIABLO SCENIC BLVD |
|---|---|
| City | DIABLO |
| State | CA |
| Zip | 94528 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | PARCEL MAP 16 PG 49 PCL A |
| Legal Subdivision | MOUNT DIABLO ESTATE PARK SUB |
| Legal Tract | 16PM49 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 346205 |
2355 Mount Diablo St is owner-occupied and held in a trust since September 2008.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 2355 MOUNT DIABLO SCENIC BLVD, DIABLO, CA 94528 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Dec 9, 2021 | Deed of Trust, Mortgage · Conventional Mortgage FREMONT BANK |
| Jun 4, 2018 | Deed of Trust, Mortgage · Conventional Mortgage FREMONT BK |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Sep 27, 2008 |
| Transfer Doc | 0000217964 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 2355 MOUNT DIABLO ST, CONCORD, CA 94520 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 2355 MOUNT DIABLO SCENIC BOULEVARD, DIABLO, CA 94528 |
| Document Number | 0000335381 |
|---|---|
| Date | Dec 9, 2021 |
| Instrument | 2021-335381 |
| Name | FREMONT BANK |
|---|---|
| Type | Bank |
| Address | LIVERMORE, CA 94551 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jan 1, 2052 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 2355 MOUNT DIABLO ST, CONCORD, CA 94520 |
| Document Number | 0000090597 |
| Instrument Date | Jun 4, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Jun 14, 2018 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 2355 MOUNT DIABLO SCENIC BLVD DIABLO CA 94528, DIABLO, CA 94528 |
| Document Number | 0000090597 |
|---|---|
| Date | Jun 7, 2018 |
| Instrument | 90597 |
| Name | FREMONT BK |
|---|---|
| Type | Bank |
| Address | LIVERMORE, CA 94551 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Jun 6, 2048 |
The 2025 property tax bill for 2355 Mount Diablo St was $4,310 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $244,618 (+2%) Land $62,486 Building $182,132 | |
| 2025 | $4,310.00 Homeowner's exemption | $239,822 Land $61,261 Building $178,561 |
| 2023 | $4,117.00 (+1.18%) Homeowner's exemption | $230,511 Land $58,883 Building $171,628 |
| 2022 | $4,069.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 2355 Mount Diablo St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 6 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.
Wildfire risk around 2355 Mount Diablo St is high, ranking above 86% of the US, with a 0.9% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 86% of the US · above 66% of California |
|---|---|
| Wildfire Likelihood | 0.9% annual chance |
| Exposure | Direct burnable vegetation |
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 69 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| AT&T DSL | 100 / 20 |
May also be available: Etheric Networks, T-Mobile, Verizon.
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