Contra Costa County property record for 105 Costanza Dr, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,080 sqft · built 1988 |
| Lot Size | 0.826 acres (36,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $500,000 (Jan 2002) |
| Tax Bill | $9,724 (2025) |
| Deeds & Mortgages | Nov 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 155-560-013-7 |
| Primary APN | 155-560-013-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,080 sqft Living Area |
| 1st Floor Area | 1,284 sqft |
| 2nd Floor Area | 796 sqft |
| Year Built | Built 1988 |
|---|---|
| Effective Year Built | Effective 1988 |
| Lot Area | 36,000 sqft (0.826 acres) |
| Garage Type | Attached |
| Garage Area | 638 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 105 COSTANZA DR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6625 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T6758 L22 |
| Legal Subdivision | SUBDIVISION 6758 |
| Legal Tract | 6758 |
| Legal Lot Number | 22 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 321102 |
105 Costanza Dr is owned and occupied by two individuals who acquired it in November 2020.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 105 COSTANZA DR, MARTINEZ, CA 94553-6625 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jan 10, 2002 · Amount on File |
| Deed Sale | Jan 10, 2002 · Amount on File |
| Deed Document Number | 20028856 |
| Last Transfer Date | Nov 2, 2020 |
| Transfer Doc | 0000277028 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 17, 2020 |
| Property Address | 105 COSTANZA DR, MARTINEZ, CA 94553-6625 |
| Document Number | 0000277028 |
| Map Reference | MB 305 PG 13 |
| Instrument Date | Nov 2, 2020 |
| Instrument | 2020-277028 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | AMERICAN COAST TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 105 COSTANZA DR, MARTINEZ, CA 94553-6625 |
| Document Number | 0000277029 |
|---|---|
| Date | Nov 17, 2020 |
| Instrument | 2020-277029 |
| Name | LOANDEPOT.COM LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Dec 1, 2050 |
The 2025 property tax bill for 105 Costanza Dr was $9,724 with a homeowner's exemption.
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 | $766,274 (+2%) Land $421,906 Building $344,368 | |
| 2025 | $9,724.00 Homeowner's exemption | $751,250 Land $413,634 Building $337,616 |
| 2023 | $9,131.00 (+1.69%) Homeowner's exemption | $722,080 Land $397,573 Building $324,507 |
| 2022 | $8,979.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 105 Costanza Dr in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 1982.
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 |
| Nearby Flood Claims | 2 (1982–1995) |
| Claims Outside the SFHA | 1 of 2 |
| Most Recent Claim | Jan 1995 · Severe Winter Storms, Flooding, Landslides, Mud Flows |
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.
Wildfire risk around 105 Costanza Dr is moderate, ranking above 62% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 62% of the US · lower than 62% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Direct burnable vegetation |
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 162 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Unwired.
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