Contra Costa County property record for 4530 Grothman Ln, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,698 sqft · built 1951 |
| Lot Size | 0.487 acres (21,213 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $85,000 (Dec 2024) |
| Tax Bill | $13,180 (2025) |
| Deeds & Mortgages | Jun 2021 Mortgage |
| Flood Zone | Zone AO (high risk) |
| APN | 162-242-028-7 |
| Primary APN | 162-242-028-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,698 sqft Living Area |
| 1st Floor Area | 2,698 sqft |
| Year Built | Built 1951 |
|---|---|
| Effective Year Built | Effective 1975 |
| Lot Area | 21,213 sqft (0.487 acres) |
| Garage Type | Attached |
| Garage Area | 1,215 sqft |
| Parking Spaces | 5 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 4530 GROTHMAN LN |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4412 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R110 |
| 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 shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 2290 FRANKLIN CANYON RD, MARTINEZ, CA 94553-9609 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 20, 2024 · Amount on Record |
| Deed Sale | Dec 20, 2024 · Amount on Record |
| Prior Sale | Dec 31, 2014 · Amount on Record |
| Deed Document Number | 2024136319 |
| Prior Transfer Date | Jun 11, 2021 |
| Prior Transfer Doc | 0000175676 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 17, 2021 |
| Property Address | 4530 GROTHMAN LN, MARTINEZ, CA 94553-4412 |
| Document Number | 0000175676 |
| Instrument Date | Jun 11, 2021 |
| Instrument | 2021-175676 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants in Common |
| Address | 4530 GROTHMAN LN, MARTINEZ, CA 94553-4412 |
| Document Number | 0000175677 |
|---|---|
| Date | Jun 17, 2021 |
| Instrument | 2021-175677 |
| Name | PINNACLE FUNDING CORP |
|---|---|
| Type | Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jul 1, 2051 |
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 | $1,059,742 (+2%) Land $510,743 Building $548,999 | |
| 2025 | $13,180.00 (+5.52%) | $1,038,964 (+3.04%) Land $500,729 Building $538,235 |
| 2023 | $12,490.00 (+13.62%) | $1,008,264 Land $489,652 Building $518,612 |
| 2022 | $10,993.00 |
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 AO high risk · sheet flow 1–3 ft |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| 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
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