401 Underhill Dr, Napa, CA 94558 Property Records

Napa County property record for 401 Underhill Dr, Napa, CA 94558

Property Summary

Property Type	Duplex
Details	4 bd · 2 ba · 1,800 sqft · built 1962
Lot Size	0.23 acres (10,019 sqft)
Owner	2 Trust Names on File
Last Sale	$835,000 (Apr 2024)
Tax Bill	$10,999 (2026)
Deeds & Mortgages	Apr 2024 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`004-362-019-000`

Property Details

APN / Parcel Number

Primary APN	`004-362-019-000`
Alternative APNs	`004-362-019` `00436219`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Building Area	1,800 sqft Living Area
Gross Area	2,328 sqft

Exterior

Year Built	Built 1962
Effective Year Built	Effective 1962
Architectural Style	Duplex Single
Construction Type	Wood
Lot Area	10,019 sqft (0.23 acres)
Garage Type	Attached
Garage Area	528 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	A/C Office Only
Heating System	Central

Location & Zoning

Old Parcel Number	004-362-019
Street Address	401 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 C MAP NO 846 9R/S74
Legal Subdivision	LANDS OF HARRIS E CHITTENDEN ET UX
Jurisdiction	NAPA CA
Township / Civil Division	NAPA
Census Block Group	1
Census Block	1001
Census Tract	200802

Owner

401 Underhill Dr, a duplex, is held in a trust since April 2024.

Source: Napa County records, as of October 21, 2026

Owner of Record	2 Trust Names on File
Mailing Address	2571 ELM ST, NAPA, CA 94558-6027
Owner Type	Company
Vesting	Trust, Family Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 12, 2024 · Amount on File
Deed Sale	Apr 12, 2024 · Amount on File
Prior Sale	Aug 6, 1998 · Amount on File
Deed Document Number	20245142
Prior Transfer Date	Oct 17, 2011
Prior Transfer Doc	0000026819
Record Updated	Oct 29, 2026

April 2024: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	NAPA CA
Recording Date	Apr 12, 2024
Property Address	401 UNDERHILL DR, NAPA, CA 94558-6105
Document Number	0000005142
Map Reference	MB 9 PG 74
Instrument Date	Mar 29, 2024
Instrument	2024-0005142
Transaction Type	Transfer
Record Updated	May 6, 2024
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	401 UNDERHILL DR # 411, 411, NAPA, CA 94558-6105

Mortgage

Document Number	0000005143
Date	Apr 12, 2024
Instrument	2024-0005143

Lender

Name	PRIMARY RESIDENTIAL MORTGAGE INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	May 1, 2054

Mortgage

Document Number	0000005143
Date	Apr 12, 2024
Instrument	2024-0005143

Lender

Name	PRIMARY RESIDENTIAL MORTGAGE INC
Type	Mortgage Company
Address	1480 N 2200 W, SALT LAKE CITY, UT 84116

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	May 1, 2054

Tax Assessment & Valuation

The 2026 property tax bill for 401 Underhill Dr was $10,999, up 1.6% from the year before.

Source: Napa County assessment roll, as of October 21, 2026

Property Jurisdictions

Type	Name
State	California
County	Napa County
Municipality	Napa City
Unified School District	Napa Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$10,999.00 (+1.56%)	$863,055 (+1.33%) Land $413,439 Building $449,616	$863,055 Land $413,439 Building $449,616
2025	$10,830.00	$851,700 Land $408,000 Building $443,700
2023	$4,530.00 (-0.24%)	$286,281 Land $150,676 Building $135,605
2022	$4,541.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 401 Underhill Dr in Zone X, an area of minimal flood risk.

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.

Wildfire

Wildfire risk around 401 Underhill Dr is low, with less than 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 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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

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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