Contra Costa County property record for 135 Muir Rd, Martinez, CA 94553
| Property Type | Quadplex |
|---|---|
| Details | 3,360 sqft · built 1965 |
| Lot Size | 0.193 acres (8,400 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,050,000 (Aug 2026) |
| Tax Bill | $10,025 (2025) |
| Deeds & Mortgages | Aug 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 162-343-012-9 |
| Primary APN | 162-343-012-9 |
|---|---|
| Alternative APN |
|
| Total Rooms | 4 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 3,360 sqft Living Area |
| 1st Floor Area | 3,360 sqft |
| Year Built | Built 1965 |
|---|---|
| Effective Year Built | Effective 1965 |
| Architectural Style | Quadruplex |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Tar & Gravel |
| Lot Area | 8,400 sqft (0.193 acres) |
| Garage Type | Detached |
| Parking Spaces | 4 Parking Spaces |
| Heating System | Floor/Wall Furnace |
|---|
| Street Address | 135 MUIR RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4678 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Legal Description | TRACT 3228 LOT 43 |
| Legal Subdivision | ORLEANS PLAZA |
| Legal Tract | 3228 |
| Legal Lot Number | 43 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 321101 |
135 Muir Rd, a quadplex, is owned by two individuals who bought it in August 2026.
Source: Contra Costa County records, as of August 20, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4000 ARBOLADO DR, WALNUT CREEK, CA 94598-4684 |
| Owner Type | Individual |
| Vesting | Community Property |
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 | Aug 11, 2026 · Amount on File |
| Deed Sale | Aug 11, 2026 · Amount on File |
| Deed Document Number | 202684396 |
| Prior Transfer Date | Jan 30, 2003 |
| Prior Transfer Doc | 0000064033 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Aug 11, 2026 |
| Property Address | 135 MUIR RD, MARTINEZ, CA 94553-4678 |
| Document Number | 0000084396 |
| Instrument Date | Aug 7, 2026 |
| Instrument | 202684396 |
| Transaction Type | Transfer |
| Record Updated | Aug 20, 2026 |
| Title Company | STEWART TITLE, STEWART TITLE GUARANTY COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $116,655.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 4000 ARBOLADO DR, WALNUT CREEK, CA 94598-4684 |
| Document Number | 0000084397, |
|---|---|
| Date | Aug 11, 2026 |
| Instrument | 202684397 |
| Name | GREENBOX LOANS |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Sep 1, 2056 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 6.49% |
| Initial Type | Adjustable Rate |
| Adjustable | Adjustable Rate Rider |
| Max Rate | -1% |
The 2025 property tax bill for 135 Muir Rd was $10,025.
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 | $478,309 (+2%) Land $147,162 Building $331,147 | |
| 2025 | $10,025.00 | $468,931 Land $144,277 Building $324,654 |
| 2023 | $9,245.00 (+4.36%) | $450,725 Land $138,676 Building $312,049 |
| 2022 | $8,859.00 |
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.
FEMA maps place 135 Muir Rd in Zone X, an area of minimal flood risk.
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 Policies | 1 in force |
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 135 Muir Rd is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 95% of the US · lower than 97% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% 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 239 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 |
May also be available: Astound Broadband, AT&T, T-Mobile, Verizon.
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