Napa County property record for 643 Pratt Ave, Saint Helena, CA 94574
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,612 sqft · built 1931 |
| Lot Size | 0.23 acres (10,019 sqft) |
| Owner | Trust Name on File |
| Last Sale | $875,000 (Sep 2004) |
| Tax Bill | $13,170 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 009-040-003-000 |
| Primary APN | 009-040-003-000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Building Area | 1,612 sqft Living Area |
| Gross Area | 1,992 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1931 |
|---|---|
| Effective Year Built | Effective 1980 |
| Construction Type | Wood |
| Lot Area | 10,019 sqft (0.23 acres) |
| Garage Type | Attached |
| Garage Area | 380 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | None |
|---|---|
| Heating System | HVAC |
| Old Parcel Number | 009-040-003 |
|---|---|
| Street Address | 643 PRATT AVE |
| City | SAINT HELENA |
| State | CA |
| Zip | 94574-1056 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Jurisdiction | NAPA CA |
| Township / Civil Division | ST. HELENA |
| Census Block Group | 4 |
| Census Block | 4000 |
| Census Tract | 201602 |
643 Pratt Ave is owner-occupied and held in a trust since May 2008.
Source: Napa County records, as of October 21, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 643 PRATT AVE, SAINT HELENA, CA 94574-1056 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Sep 17, 2004 · Amount on File |
| Deed Sale | Sep 17, 2004 · Amount on File |
| Prior Sale | Jun 23, 1995 · Amount on File |
| Deed Document Number | 200438938 |
| Last Transfer Date | May 10, 2008 |
| Transfer Doc | 0000015316 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 643 Pratt Ave was $13,170 with a homeowner's exemption, up 1.7% from the year before.
Source: Napa County assessment roll, as of October 21, 2026
| Type | Name |
|---|---|
| State | California |
| County | Napa County |
| Municipality | St. Helena City |
| Unified School District | St. Helena Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $13,170.00 (+1.75%) Homeowner's exemption | $1,244,056 (+2%) Land $710,890 Building $533,166 | $1,244,056 Land $710,890 Building $533,166 |
| 2025 | $12,944.00 Homeowner's exemption | $1,219,663 Land $696,951 Building $522,712 | |
| 2023 | $12,532.00 (+3.99%) Homeowner's exemption | $1,172,304 Land $669,889 Building $502,415 | |
| 2022 | $12,051.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 643 Pratt Ave in Zone X, an area of minimal flood risk, though there have been 6 flood claims nearby since 1995.
Source: FEMA National Flood Hazard Layer, effective June 25, 2024 · 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 |
| Flood Insurance Cost | Premium on File median of 20 policies |
| Nearby Flood Policies | 20 in force |
| Nearby Flood Claims | 6 (1995–2005) |
| Claims Outside the SFHA | 4 of 6 |
| Most Recent Claim | Dec 2005 · Severe Storms, Flooding, Mudslides, And Landslides |
| Claims by Event |
|
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 643 Pratt Ave is low, with 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 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 ST. HELENA serves 5,386 people · EPA ID CA2810004 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Feb 2025 |
| Lead | Under 1 ppb (2024–2026) action level 15 ppb |
| Water Quality | Haloacetic acids not recorded as resolved · Jul 2023 Treatment failure resolved · Nov 2020 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 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 50 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Valley Internet Fixed Wireless | 150 / 75 |
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