Contra Costa County property record for 518 Thistle Cir, Martinez, CA 94553
| Property Type | Townhouse |
|---|---|
| Details | 2 bd · 1.5 ba · 913 sqft · built 1977 |
| Lot Size | 0.047 acres (2,054 sqft) |
| Owner | Individual Name on File |
| Last Sale | $565,000 (Mar 2024) |
| Tax Bill | $7,407 (2025) |
| Deeds & Mortgages | Mar 2024 Sale & Mortgage Dec 2018 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 154-604-011-2 |
| Primary APN | 154-604-011-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 913 sqft Living Area |
| Gross Area | 1,353 sqft |
| 1st Floor Area | 913 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1978 |
| Architectural Style | Contemporary |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 2,054 sqft (0.047 acres) |
| Garage Type | Attached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 518 THISTLE CIR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-5817 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Townhouse |
| Local Zoning Code | PUD |
| Legal Description | T04387 L0011 B |
| Legal Subdivision | HEATHER HILL UNION #2 |
| Legal Tract | 04387 |
| Legal Lot Number | 11 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3012 |
| Census Tract | 321102 |
518 Thistle Cir, a townhouse, is owned and occupied by an individual who bought it in March 2024.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 518 THISTLE CIR, MARTINEZ, CA 94553-5817 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Mar 28, 2024 | Grant Deed, Transfer · Conventional Mortgage CROSSCOUNTRY MORTGAGE LLC |
| Dec 21, 2018 | Deed of Trust, Mortgage · Conventional Mortgage MASON MCDUFFIE MORTGAGE CORP |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 28, 2024 · Amount on File |
| Deed Sale | Mar 28, 2024 · Amount on File |
| Prior Sale | Jul 1, 2014 · Amount on File |
| Deed Document Number | 202428547 |
| Prior Transfer Date | Mar 20, 1997 |
| Prior Transfer Doc | 0000050927 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Mar 28, 2024 |
| Property Address | 518 THISTLE CIR, MARTINEZ, CA 94553-5817 |
| Document Number | 0000028547 |
| Map Reference | MB 158 PG 4 |
| Instrument Date | Mar 25, 2024 |
| Instrument | 2024-028547 |
| Transaction Type | Transfer |
| Record Updated | Apr 9, 2024 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 518 THISTLE CIR, MARTINEZ, CA 94553-5817 |
| Document Number | 0000028548 |
|---|---|
| Date | Mar 28, 2024 |
| Instrument | 2024-028548 |
| Name | CROSSCOUNTRY MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Apr 1, 2054 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 518 THISTLE CIR, MARTINEZ, CA 94553-5817 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000204011 |
|---|---|
| Date | Dec 21, 2018 |
| Instrument | 2018-204011 |
| Name | MASON MCDUFFIE MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Address | SAN RAMON, CA 94583 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jan 1, 2049 |
The 2025 property tax bill for 518 Thistle Cir was $7,407.
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 | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $545,000 (-5.43%) Land $289,381 Building $255,619 | |
| 2025 | $7,407.00 | $576,300 Land $306,000 Building $270,300 |
| 2023 | $4,383.00 (+0.87%) Homeowner's exemption | $317,667 Land $202,152 Building $115,515 |
| 2022 | $4,345.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 518 Thistle Cir 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 518 Thistle Cir is moderate, ranking above 52% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 52% of the US · lower than 69% of California |
|---|---|
| Wildfire Likelihood | 0.1% 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 371 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
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