Napa County property record for 421 Underhill Dr, Napa, CA 94558
| Property Type | Duplex |
|---|---|
| Lot Size | 0.24 acres (10,454 sqft) |
| Owner | Company Name on Record |
| Last Sale | $471,000 (Aug 2015) |
| Tax Bill | $7,681 (2026) |
| Deeds & Mortgages | Feb 2019 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 004-362-020-000 |
| Primary APN | 004-362-020-000 |
|---|---|
| Alternative APNs |
|
| Architectural Style | Duplex Single |
|---|---|
| Lot Area | 10,454 sqft (0.24 acres) |
| Old Parcel Number | 004-362-020 |
|---|---|
| Street Address | 421 UNDERHILL DR |
| City | NAPA |
| State | CA |
| Zip | 94558-6105 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | RM |
| Legal Description | PCL B MAP NO 846 9R/S74 |
| Legal Subdivision | HARRIS H CHITTENDEN |
| Jurisdiction | NAPA CA |
| Township / Civil Division | NAPA |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 200802 |
Source: Napa County records, as of October 21, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 1151 LARKIN WAY, NAPA, CA 94558-4332 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 28, 2015 · Amount on Record |
| Deed Sale | Aug 28, 2015 · Amount on Record |
| Deed Document Number | 201522214 |
| Last Transfer Date | Feb 1, 2019 |
| Transfer Doc | 0000002414 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | NAPA CA |
| Recording Date | Feb 14, 2019 |
| Property Address | 421 UNDERHILL DR, NAPA, CA 94558-6105 |
| Document Number | 0000002414 |
| Instrument Date | Feb 1, 2019 |
| Instrument | 2414 |
| Transaction Type | Transfer |
| Record Updated | Feb 27, 2019 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 1151 LARKIN WAY NAPA CA 945584332, NAPA, CA 94558-4332 |
Source: Napa County assessment roll, as of October 21, 2026
| Type | Name |
|---|---|
| State | California |
| County | Napa County |
| Municipality | Napa City |
| Unified School District | Napa Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $7,681.00 (+2.2%) | $568,711 (+2%) Land $241,491 Building $327,220 | $568,711 Land $241,491 Building $327,220 |
| 2025 | $7,516.00 (+2.94%) | $557,560 (+4.04%) Land $236,756 Building $320,804 | |
| 2023 | $7,301.00 (+0.4%) | $535,911 Land $227,563 Building $308,348 | |
| 2022 | $7,272.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 |
| Community Rating System | Class 7 (15% premium discount) |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 98% of the US · lower than 98.4% 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 NAPA serves 84,804 people · EPA ID CA2810003 |
|---|---|
| Water Source | Surface water |
| Lead | Under 1 ppb (2022–2024) 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 578 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: T-Mobile, Verizon.
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