Contra Costa County property record for 644 Arrowsmith Ct, Walnut Creek, CA 94598
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,517 sqft · built 1978 |
| Lot Size | 0.124 acres (5,400 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $850,000 (Jul 2016) |
| Tax Bill | $11,777 (2025) |
| Deeds & Mortgages | Jan 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 135-312-008 |
| Primary APN | 135-312-008 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,517 sqft Living Area |
| Gross Area | 1,958 sqft |
| 1st Floor Area | 1,517 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 1998 |
| Architectural Style | Ranch |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 5,400 sqft (0.124 acres) |
| Garage Type | Attached |
| Garage Area | 441 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 644 ARROWSMITH CT |
|---|---|
| City | WALNUT CREEK |
| State | CA |
| Zip | 94598-4638 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | PD |
| Legal Description | T04844 L0053 B |
| Legal Subdivision | PHEASANT RUN SUB 4844 |
| Legal Tract | 04844 |
| Legal Lot Number | 53 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 355302 |
644 Arrowsmith Ct is owned by two individuals who bought it in July 2016.
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 901 CAMILLE LN, MOUNTAIN VIEW, CA 94040-2668 |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 11, 2016 · Amount on File |
| Deed Sale | Jul 11, 2016 · Amount on File |
| Prior Sale | Sep 26, 2012 · Amount on File |
| Deed Document Number | 2016136108 |
| Prior Transfer Date | Sep 20, 2012 |
| Prior Transfer Doc | 0000236009 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 644 ARROWSMITH CT, WALNUT CREEK, CA 94598-4638 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 644 ARROWSMITH CT, WALNUT CREEK, CA 94598-4638 |
| Document Number | 0000016548 |
|---|---|
| Date | Jan 20, 2021 |
| Instrument | 2021-016548 |
| Name | QUICKEN LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Feb 1, 2051 |
The 2025 property tax bill for 644 Arrowsmith Ct was $11,777.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Walnut Creek City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,006,221 (+2%) Land $852,330 Building $153,891 | |
| 2025 | $11,777.00 | $986,492 Land $835,618 Building $150,874 |
| 2023 | $11,321.00 (+0.86%) | $948,187 Land $803,171 Building $145,016 |
| 2022 | $11,224.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 644 Arrowsmith Ct 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 644 Arrowsmith Ct is moderate, ranking above 64% of the US, with a 0.4% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 64% of the US · lower than 61% of California |
|---|---|
| Wildfire Likelihood | 0.4% 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 241 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 |
| AT&T DSL | 100 / 20 |
May also be available: Verizon.
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