Contra Costa County property record for 3603 Mount Diablo Blvd, Lafayette, CA 94549
| Property Type | Bank, Financial Building |
|---|---|
| Details | 4,092 sqft · built 2017 |
| Lot Size | 0.38 acres (16,552 sqft) |
| Owner | Company Name on File |
| Last Sale | $7,000,000 (Jun 2017) |
| Tax Bill | $97,256 (2025) |
| Deeds & Mortgages | Aug 2021 Mortgage Jun 2017 Sale & Mortgage |
| Flood Zone | Zone X (moderate risk) |
| APN | 243-110-006 |
| Primary APN | 243-110-006 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 4,092 sqft Gross Area |
| 1st Floor Area | 4,092 sqft |
| Year Built | Built 2017 |
|---|---|
| Effective Year Built | Effective 2019 |
| Lot Area | 16,552 sqft (0.38 acres) |
| Street Address | 3603 MT DIABLO BLVD |
|---|---|
| City | LAFAYETTE |
| State | CA |
| Zip | 94549-3711 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Bank, Financial Building |
| Legal Description | POR RO ACALANES |
| Legal Subdivision | ACALANES RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 350000 |
3603 Mount Diablo Blvd, a commercial property, is owned by a company that bought it in June 2017.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 425 DIVISADERO ST, 305, SAN FRANCISCO, CA 94117-2242 |
| Owner Type | Company |
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 |
|---|---|
| Aug 30, 2021 | Deed of Trust, Mortgage · Commercial Mortgage FIRST REPUBLIC BANK |
| Jun 30, 2017 | Grant Deed, Transfer · Commercial Mortgage FIRST REPUBLIC BANK |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 30, 2017 · Amount on File |
| Deed Sale | Jun 30, 2017 · Amount on File |
| Prior Sale | Dec 31, 2013 · Amount on File |
| Deed Document Number | 2017117989 |
| Prior Transfer Date | Apr 15, 2002 |
| Prior Transfer Doc | 0000143220 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 3603 MT DIABLO BLVD, LAFAYETTE, CA 94549-3711 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIRST AMERICAN TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 425 DIVISADERO ST 305, 305, SAN FRANCISCO, CA 94117-2242 |
| Document Number | 0000242990 |
|---|---|
| Date | Aug 30, 2021 |
| Instrument | 2021-242990 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 30, 2017 |
| Property Address | 3603 MT DIABLO BLVD, LAFAYETTE, CA 94549-3711 |
| Document Number | 0000117989 |
| Instrument Date | Jun 30, 2017 |
| Instrument | 2017-117989 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | FIRST AMERICAN TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 425 DIVISADERO ST STE 305, 305, SAN FRANCISCO, CA 94117-2242 |
| Document Number | 0000117990 |
|---|---|
| Date | Jun 30, 2017 |
| Instrument | 2017-117990 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
The 2025 property tax bill for 3603 Mount Diablo Blvd was $97,256.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Lafayette City |
| Secondary School District | Acalanes Union High School District (09 - 12) |
| Elementary School District | Lafayette Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $8,185,446 (+2%) Land $5,682,226 Building $2,503,220 | |
| 2025 | $97,256.00 | $8,024,948 Land $5,570,810 Building $2,454,138 |
| 2023 | $98,755.00 (+5.47%) | $7,713,332 Land $5,354,490 Building $2,358,842 |
| 2022 | $93,636.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3603 Mount Diablo Blvd in Zone X, an area of moderate 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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AO, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 25 individual policies |
| Nearby Flood Policies | 63 units insured incl. 38 condo units |
| Nearby Flood Claims | 9 (1987–2001) |
| Claims Outside the SFHA | 1 of 9 |
| Most Recent Claim | Dec 2001 · rainfall accumulation |
| Claims by Event |
|
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 3603 Mount Diablo Blvd is low, with a 0.01% annual chance of wildfire.
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 291 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · 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 |
May also be available: Etheric Networks, T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures