Contra Costa County property record for 2243 Mount Diablo St, Concord, CA 94520
| Property Type | Single Family Home |
|---|---|
| Details | 2,011 sqft · built 1895 |
| Lot Size | 0.23 acres (10,000 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $350,000 (Sep 1999) |
| Tax Bill | $6,870 (2025) |
| Deeds & Mortgages | Oct 2020 Mortgage Aug 2019 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 112-123-012 |
| Primary APN | 112-123-012 |
|---|---|
| Alternative APN |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 1 Story |
| Building Area | 2,011 sqft Living Area |
| 1st Floor Area | 2,011 sqft |
| Year Built | Built 1895 |
|---|---|
| Effective Year Built | Effective 1935 |
| Lot Area | 10,000 sqft (0.23 acres) |
| Street Address | 2243 MOUNT DIABLO ST |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-2211 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | BOYDS ADDN N 100 FT OF S 170 FT LOT 5 BLK 3 |
| Legal Subdivision | BOYDS ADD |
| Legal Block | 3 |
| Legal Lot Number | 5 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4013 |
| Census Tract | 329000 |
Source: Contra Costa County records, as of August 6, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 1647 WILLOW PASS RD, CONCORD, CA 94520-2611 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| Oct 7, 2020 | Deed of Trust, Mortgage · Conventional Mortgage WATERMARK CAPITAL INC |
| Aug 15, 2019 | Deed of Trust, Mortgage WATERMARK CAP |
| Sep 14, 2018 | Deed of Trust, Mortgage · Conventional Mortgage WATERMARK CAP |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 16, 1999 · Amount on Record |
| Deed Sale | Sep 16, 1999 · Amount on Record |
| Deed Document Number | 1999247880 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 2243 MOUNT DIABLO ST, CONCORD, CA 94520-2211 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATL TTL ORANGE CNT |
| Name | Verified Name |
|---|---|
| Address | 2243 MOUNT DIABLO ST, CONCORD, CA 94520-2211 |
| Document Number | 0000230237 |
|---|---|
| Date | Oct 7, 2020 |
| Instrument | 2020-230237 |
| Name | WATERMARK CAPITAL INC |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92618 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 1, 2050 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 2243 MOUNT DIABLO ST, CONCORD, CA 94520-2211 |
| Document Number | 0000133090 |
| Instrument Date | Aug 15, 2019 |
| Transaction Type | Mortgage |
| Record Updated | Aug 27, 2019 |
| Title Company | SERVICELINK |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 1647 WILLOW PASS RD #445 CONCORD CA 945202611, 445, CONCORD, CA 94520-2611 |
| Document Number | 0000133090 |
|---|---|
| Date | Aug 20, 2019 |
| Instrument | 133090 |
| Name | WATERMARK CAP |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92618 |
| Amount | Amount Recorded |
|---|---|
| Term | 360 Months |
| Due | Aug 19, 2049 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 2243 MOUNT DIABLO ST, CONCORD, CA 94520-2211 |
| Document Number | 0000150243 |
| Instrument Date | Sep 14, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Sep 28, 2018 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 2243 MOUNT DIABLO ST CONCORD CA 945202211, CONCORD, CA 94520-2211 |
| Document Number | 0000150243 |
|---|---|
| Date | Sep 19, 2018 |
| Instrument | 150243 |
| Name | WATERMARK CAP |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92618 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Sep 18, 2048 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Concord City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $548,677 (+2%) Land $266,502 Building $282,175 | |
| 2025 | $6,870.00 (+4.76%) Homeowner's exemption | $537,920 (+4.04%) Land $261,277 Building $276,643 |
| 2023 | $6,558.00 (+1.44%) Homeowner's exemption | $517,033 Land $251,132 Building $265,901 |
| 2022 | $6,465.00 |
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 3 (1980–1983) |
| Most Recent Claim | Jan 1983 · Coastal Storms, Floods, Slides & Tornadoes |
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 | 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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.
Source: FCC Broadband Data Collection, based on 344 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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