Contra Costa County property record for 4884 John Muir Rd, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,470 sqft · built 1963 |
| Lot Size | 0.964 acres (42,000 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $640,000 (Nov 2006) |
| Tax Bill | $10,972 (2025) |
| Deeds & Mortgages | Jun 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 162-131-005-9 |
| Primary APN | 162-131-005-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,470 sqft Living Area |
| 1st Floor Area | 1,470 sqft |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1965 |
| Lot Area | 42,000 sqft (0.964 acres) |
| Garage Type | Attached |
| Garage Area | 429 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 4884 JOHN MUIR RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4530 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R40 |
| Legal Description | MUIR OAKS POR LOT 28 |
| Legal Subdivision | MUIR OAKS |
| Legal Lot Number | 28 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4000 |
| Census Tract | 321101 |
4884 John Muir Rd is owner-occupied and held in a trust since April 2012.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 4884 JOHN MUIR RD, MARTINEZ, CA 94553-4530 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
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 | Nov 30, 2006 · Amount on File |
| Deed Sale | Nov 30, 2006 · Amount on File |
| Deed Document Number | 2006382447 |
| Last Transfer Date | Apr 14, 2012 |
| Transfer Doc | 0000086415 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 4884 JOHN MUIR RD, MARTINEZ, CA 94553-4530 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | PLACER TITLE CO ROSEVILLE CA |
| Name | Verified Name |
|---|
| Document Number | 0000120926 |
|---|---|
| Date | Jun 22, 2020 |
| Instrument | 2020-120926 |
| Name | PATELCO CU |
|---|---|
| Type | Credit Union |
| Address | DUBLIN, CA 94568 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 181 Months |
| Due | Jul 1, 2035 |
The 2025 property tax bill for 4884 John Muir Rd was $10,972 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 | $874,595 (+2%) Land $614,954 Building $259,641 | |
| 2025 | $10,972.00 Homeowner's exemption | $857,447 Land $602,897 Building $254,550 |
| 2023 | $10,303.00 (+1.7%) Homeowner's exemption | $824,153 Land $579,487 Building $244,666 |
| 2022 | $10,131.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4884 John Muir Rd in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1981.
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 |
| Nearby Flood Claims | 1 (1981) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Nov 1981 · rainfall accumulation |
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 4884 John Muir Rd is low, with a 0.05% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 62% of the US · lower than 77% of California |
|---|---|
| Wildfire Likelihood | 0.05% 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 187 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 DSL | 100 / 20 |
May also be available: Astound Broadband.
5G (outdoors only) and 4G LTE
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