Contra Costa County property record for 4663 N Larwin Ave, Concord, CA 94521
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,587 sqft · built 1973 |
| Lot Size | 0.127 acres (5,520 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $2,568 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 133-281-018-1 |
| Primary APN | 133-281-018-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 2,587 sqft Living Area |
| 1st Floor Area | 1,320 sqft |
| 2nd Floor Area | 1,267 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1973 |
|---|---|
| Effective Year Built | Effective 1983 |
| Architectural Style | Cluster |
| Lot Area | 5,520 sqft (0.127 acres) |
| Garage Type | Attached |
| Garage Area | 564 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Street Address | 4663 N LARWIN AVE |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94521-4316 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | PD |
| Legal Description | TRACT 3935 LOT 40 EX MR |
| Legal Subdivision | THE CROSSINGS SUBDIVISION 3935 |
| Legal Tract | 3935 |
| Legal Lot Number | 40 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 334006 |
4663 N Larwin Ave is held in a trust since January 2011.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 4663 N LARWIN AVE, CONCORD, CA 94521-4316 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Jan 4, 2011 |
| Transfer Doc | 0000004247 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 4663 N Larwin Ave was $2,568.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Concord City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $149,843 (+2%) Land $35,730 Building $114,113 | |
| 2025 | $2,568.00 | $146,906 Land $35,030 Building $111,876 |
| 2023 | $2,414.00 (+2.42%) | $141,204 Land $33,671 Building $107,533 |
| 2022 | $2,357.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4663 N Larwin Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 4663 N Larwin Ave is moderate, ranking above 45% of the US, with a 0.07% annual chance of wildfire.
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 | 0.07% 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 472 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
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