Contra Costa County property record for 133 Gilbert Ct, Martinez, CA 94553 · Last verified August 2026
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 2,040 sqft · built 1965 |
| Lot Size | 0.184 acres (8,000 sqft) |
| Owner | Individual Name on File |
| Last Sale | $797,000 (Dec 2024) |
| Tax Bill | $10,920 (2025) |
| Deeds & Mortgages | Oct 2024 Line of Credit Oct 2025 Sale + 3 more |
| Flood Zone | Zone AO (high risk) |
| APN | 366-130-008-1 |
| Primary APN | 366-130-008-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,040 sqft Living Area |
| 1st Floor Area | 2,040 sqft |
| Year Built | Built 1965 |
|---|---|
| Effective Year Built | Effective 1966 |
| Architectural Style | Duplex Single |
| Lot Area | 8,000 sqft (0.184 acres) |
| Garage Type | Attached |
| Garage Area | 561 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 133 GILBERT CT, 135 |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-5723 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | TRACT 3003 LOT 4 |
| Legal Subdivision | SUBDIVISION 3003 |
| Legal Tract | 3003 |
| Legal Lot Number | 4 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 321103 |
Source: Contra Costa County records · APN 366-130-008-1
Assessment roll updated July 14, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 316 CASTLE CREEK CT, MARTINEZ, CA 94553-9703 |
| Owner Type | Individual |
| Vesting | Unmarried Man |
| Date | Document |
|---|---|
| Oct 01, 2024 | Deed of Trust, Mortgage · Line of Credit THE JEFFREY B MAYNE REVOCABLE LIVING TRU |
| Oct 08, 2025 | Grant Deed, Transfer |
| Dec 03, 2024 | Grant Deed, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Jul 13, 2023 | Intrafamily Transfer, Transfer |
| Jun 07, 2018 | Affidavit of Death, Transfer ATTORNEY ONLY |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Dec 03, 2024 · Amount on Record |
| Deed Sale | Dec 03, 2024 · Amount on Record |
| Deed Document Number | 2024129748 |
| Prior Transfer Date | Jul 06, 2023 |
| Prior Transfer Doc | 0000066578 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 133 GILBERT CT, MARTINEZ, CA 94553-5723 |
| Transaction Type | Mortgage |
| Record Updated | Dec 19, 2025 |
| Title Company | FIRST AMERICAN TITLE, FIRST AMERICAN MORTGAGE SOL |
| Name | Verified Name |
|---|---|
| Address | 3208 BAYWOOD LN, NAPA, CA 94558-3108 |
| Document Number | 0000093326 |
|---|---|
| Date | Oct 01, 2024 |
| Instrument | 2024-0093326 |
| Name | THE JEFFREY B MAYNE REVOCABLE LIVING TRU |
|---|---|
| Type | Private Party |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Oct 08, 2025 |
| Property Address | 133 GILBERT CT, MARTINEZ, CA 94553-5723 |
| Document Number | 0000105521 |
| Map Reference | MB 95 PG 2 |
| Instrument Date | Oct 08, 2025 |
| Instrument | 2025- 105521 |
| Transaction Type | Transfer |
| Record Updated | Dec 19, 2025 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 316 CASTLE CREEK CT, MARTINEZ, CA 94553-9703 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Dec 03, 2024 |
| Property Address | 133 GILBERT CT, MARTINEZ, CA 94553-5723 |
| Document Number | 0000129748 |
| Map Reference | MB 95 PG 2 |
| Instrument Date | Nov 27, 2024 |
| Instrument | 2024- 129748 |
| Transaction Type | Transfer |
| Record Updated | Dec 19, 2025 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 1734 ALHAMBRA AVE, MARTINEZ, CA 94553-2502 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 13, 2023 |
| Property Address | 133-135 GILBERT CT # 135, 135, MARTINEZ, CA 94553 |
| Document Number | 0000066578 |
| Map Reference | MB 95 PG 2 |
| Instrument Date | Jul 06, 2023 |
| Instrument | 2023-066578 |
| Transaction Type | Transfer |
| Record Updated | Jul 24, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 1015 AUSTIN WAY, NAPA, CA 94558-4258 |
| Document Type | Affidavit of Death |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 07, 2018 |
| Property Address | 133-135 GILBERT CT # 135, 135, MARTINEZ, CA 94553 |
| Document Number | 0000090332 |
| Instrument Date | May 23, 2018 |
| Instrument | 90332 |
| Transaction Type | Transfer |
| Record Updated | Sep 07, 2018 |
| Title Company | ATTORNEY ONLY |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 1015 AUSTIN WAY NAPA CA 945584258, NAPA, CA 94558-4258 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Martinez City |
| Unified School District | Martinez Unified School District (KG - 12) |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $812,736 (+2%) Land $469,200 Building $343,536 | |
| 2025 | $10,920.00 (+314.58%) | $796,800 (+754.47%) Land $460,000 Building $336,800 |
| 2023 | $2,634.00 (-1.68%) | $93,251 (+2%) Land $25,889 Building $67,362 |
| 2022 | $2,679.00 | $91,424 Land $25,382 Building $66,042 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133211032, 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 AO sheet flow 1–3 ft |
|---|---|
| Special Flood Hazard Area | Yes |
| Flood Hazard | High |
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required (federally backed mortgages) |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 8 in force |
| Nearby Flood Claims | 4 (1995–1998) |
| Claims Outside the SFHA | 1 of 4 |
| Most Recent Claim | Mar 1998, rainfall accumulation, Severe Winter Storms And Flooding |
| Wildfire Risk | Moderate above 63% of the US · above 38% of California |
|---|---|
| Wildfire Likelihood | About 1 in 457 per year |
| Exposure | Indirect within 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 256 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| AT&T | Fixed Wireless | 100 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: Verizon, Unwired, T-Mobile USA, AT&T, Radiate Holdings. Availability varies by address; speeds are provider-advertised maximums, not measured.
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