Contra Costa County property record for 4800 Imhoff Pl, Martinez, CA 94553 · Last verified July 2026
| Property Type | Federal Property (Exempt) |
|---|---|
| Details | 34,900 sqft · built 2005 |
| Lot Size | 9.43 acres (411,206 sqft) |
| Owner | Company Name on File |
| Tax Bill | $18,859 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-140-059-1 |
| Primary APN | 159-140-059-1 |
|---|---|
| Alternative APN |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 1 Story |
| Building Area | 34,900 sqft Gross Area |
| 1st Floor Area | 34,900 sqft |
| Year Built | Built 2005 |
|---|---|
| Effective Year Built | Effective 2006 |
| Lot Area | 411,206 sqft |
| Street Address | 4800 IMHOFF PL |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4300 |
| Property Category | Public Works |
| Property Type | Public Works > Federal Property (Exempt) |
| Legal Description | POR RO LAS JUNTAS |
| Legal Subdivision | RO LAS JUNTAS |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1009 |
| Census Tract | 320004 |
Source: Contra Costa County records · APN 159-140-059-1
Assessment roll updated July 14, 2026 · Last verified July 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 File |
|---|---|
| Mailing Address | 255 GLACIER DR, MARTINEZ, CA 94553-4825 |
| Owner Type | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $12,035,380 (+2%) Land $158,792 Building $11,876,588 | |
| 2025 | $18,859.00 (+50.68%) | $11,799,393 (+4.04%) Land $155,679 Building $11,643,714 |
| 2023 | $12,516.00 (+21.03%) | $11,341,210 Land $149,635 Building $11,191,575 |
| 2022 | $10,341.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133200041, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 4 in force |
| Nearby Flood Claims | 1 (2017) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 2017, rainfall accumulation, Severe Winter Storms, Flooding, And Mudslides |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 244 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Radiate Holdings | Fiber | 1,500 / 1,500 |
| Unwired | Fixed Wireless | 300 / 25 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
May also be available at this address: AT&T, Radiate Holdings, Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
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