Contra Costa County property record for 121 McMahon Ct, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,780 sqft · built 2002 |
| Lot Size | 0.272 acres (11,848 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $312,000 (Oct 2015) |
| Tax Bill | $11,607 (2025) |
| Deeds & Mortgages | Nov 2025 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 366-210-006-8 |
| Primary APN | 366-210-006-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 2,780 sqft Living Area |
| 1st Floor Area | 2,780 sqft |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Lot Area | 11,848 sqft (0.272 acres) |
| Garage Type | Attached |
| Garage Area | 674 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 121 MCMAHON CT |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6164 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8397 L6 |
| Legal Subdivision | 8397 |
| Legal Tract | 8397 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2000 |
| 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 | 121 MCMAHON CT, MARTINEZ, CA 94553-6164 |
| Owner Type | Company |
| Vesting | Life Tenant |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 1, 2015 · Amount on Record |
| Deed Sale | Oct 1, 2015 · Amount on Record |
| Prior Sale | Dec 10, 2003 · Amount on Record |
| Deed Document Number | 2015203498 |
| Prior Transfer Date | Sep 18, 2015 |
| Prior Transfer Doc | 0000203499 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 21, 2025 |
| Property Address | 121 MCMAHON CT, MARTINEZ, CA 94553-6164 |
| Document Number | 0000131615 |
| Map Reference | MB 433 PG 30 |
| Instrument Date | Nov 14, 2025 |
| Instrument | 2025- 131615 |
| Transaction Type | Transfer |
| Record Updated | Dec 2, 2025 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 121 MCMAHON CT, MARTINEZ, CA 94553-6164 |
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 | $839,185 (+2%) Land $362,238 Building $476,947 | |
| 2025 | $11,607.00 (+6.38%) Homeowner's exemption | $822,732 (+4.04%) Land $355,136 Building $467,596 |
| 2023 | $10,911.00 (+1.98%) Homeowner's exemption | $790,787 Land $341,347 Building $449,440 |
| 2022 | $10,699.00 |
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 minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| 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 · Severe Winter Storms And Flooding |
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 | Moderate above 45% of the US · lower than 73% of California |
|---|---|
| Wildfire Likelihood | 0.08% 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 | 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 256 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 · Fiber in parts of the area | 100 / 20 |
May also be available: Astound Broadband, T-Mobile, Unwired, Verizon.
5G (outdoors only) and 4G LTE
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