Contra Costa County property record for 4540 Grothman Ln, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 7 bd · 4 ba · 3,734 sqft · built 2005 |
| Lot Size | 0.487 acres (21,213 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $13,714 (2025) |
| Deeds & Mortgages | Feb 2023 Mortgage |
| Flood Zone | Zone X (moderate risk) |
| APN | 162-242-029-5 |
| Primary APN | 162-242-029-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 7 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 3,734 sqft Living Area |
| Gross Area | 2,784 sqft |
| 1st Floor Area | 2,784 sqft |
| Year Built | Built 2005 |
|---|---|
| Effective Year Built | Effective 2009 |
| Lot Area | 21,213 sqft (0.487 acres) |
| Garage Type | Attached |
| Garage Area | 596 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4540 GROTHMAN LN |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4412 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10 |
| Legal Description | POR PINOLE GRANT |
| Legal Subdivision | EL PINOLE RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3002 |
| Census Tract | 321103 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 4540 GROTHMAN LN, MARTINEZ, CA 94553-4412 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 16, 2013 |
| Deed Sale | Apr 16, 2013 |
| Deed Document Number | 201394675 |
| Prior Transfer Date | Apr 8, 2013 |
| Prior Transfer Doc | 0000094675 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 4540 GROTHMAN LN, MARTINEZ, CA 94553-4412 |
| Transaction Type | Mortgage |
| Record Updated | Mar 9, 2023 |
| Title Company | SERVICELINK |
| Name | Verified Name |
|---|---|
| Address | 4540 GROTHMAN LN, MARTINEZ, CA 94553-4412 |
| Document Number | 0000018112 |
|---|---|
| Date | Feb 28, 2023 |
| Instrument | 2023-018112 |
| Name | PENNYMAC LOAN SERVICES LLC |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92602 |
| Type | FHA Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 243 Months |
| Due | May 1, 2043 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Martinez City |
| Unified School District | Martinez Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $917,105 (+2%) Land $233,413 Building $683,692 | |
| 2025 | $13,714.00 (+5.35%) | $899,124 (+4.04%) Land $228,837 Building $670,287 |
| 2023 | $13,017.00 (-1.03%) | $864,211 Land $219,951 Building $644,260 |
| 2022 | $13,152.00 |
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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AO, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 27 policies |
| Nearby Flood Policies | 27 in force |
| Nearby Flood Claims | 21 (1982–2023) |
| Claims Outside the SFHA | 3 of 21 |
| Most Recent Claim | Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 70% of the US · above 45% of California |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | CITY OF MARTINEZ serves 31,015 people · EPA ID CA0710006 |
|---|---|
| Water Source | Purchased surface water from CONTRA COSTA WATER DISTRICT |
| Last State Inspection | Oct 2025 |
| Lead | Under 1 ppb (2023–2025) 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 212 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
May also be available: Astound Broadband, T-Mobile, Unwired, Verizon.
5G (outdoors only) and 4G LTE
Search by:
By searching, you agree to: Terms • Privacy • Disclosures