Assessor
Find property assessments, parcel information and property tax exemptions.
Source checked October 12, 2026[1]www.napacounty.gov
Opens this office’s own website. CountyWiki does not process applications, take payments or provide personal records.
Contact details & office locations ↓Online services & information
These links were found on official source pages. Each service is handled by the office.
Official assessor maps and property information. Read the office’s current requirements before continuing.
Search by parcel number, assessment number, street address or aircraft tail number. Follow the portal’s field formats; the county referral redirects to its Megabyte Assessor query.
Before you start
- Information & documents · Street-address search format
- For an address search, use the street number and part of the street name. Omit the street type if needed. [7]
- Availability · Specific assessment versus fee-parcel search
- An assessment-number search may not show every outstanding assessment. The portal directs users to FEE PARCEL for a summary. [8]
Fees
Fees are quoted only when a source document supports the amount and conditions.
Check the official website for its current fee schedule. No fee should be assumed to be free.
Forms & documents
Official forms and document pages for this office’s services.
Sources & last checked4 source pages · 8 citations
Sources were checked by an AI-assisted research process. A checked website does not mean every service or fee on it has been reviewed.
- [1] assessor department contact (opens in a new tab)
Napa County · Department directory: Assessor
Source reviewed October 12, 2026View supporting excerpt
Assessor Department Page
- [2] Napa County — assessor (opens in a new tab)
Napa County · Service link: Assessor Parcel Maps - Subscription Only
Source reviewed October 12, 2026View supporting excerpt
Assessor Parcel Maps - Subscription Only
- [3] Napa County — assessor (opens in a new tab)
Napa County · Forms/document link: Preliminary Change of Ownership
Source reviewed October 12, 2026View supporting excerpt
Preliminary Change of Ownership
- [4] Napa County — assessor (opens in a new tab)
Napa County · Forms/document link: Documents & Forms
Source reviewed October 12, 2026View supporting excerpt
Documents & Forms
- [5] County property-tax officials directory (opens in a new tab)
California State Board of Equalization · Napa row — assessor telephone column
Source reviewed October 14, 2026View supporting excerpt
28. Napa John Tuteur 707-253-4467 Tracy A. Schulze 707-253-4551 Neha Hoskins 707-253-4580 Bob Minahen 707-253-4327 Lieber
- [6] Napa — property query (opens in a new tab)
Napa County official service / referred provider · County property lookup — Assessor parcel-data search
Source reviewed October 15, 2026View supporting excerpt
Directions: You can search by parcel number (begins with 0), street address, assessment number (begins with 8 or 9), or aircraft tail #.
- [7] Napa — property query (opens in a new tab)
Napa County official service / referred provider · County property lookup — Street-address search format
Source reviewed October 15, 2026View supporting excerpt
You do not need to enter the entire street name or the street type
- [8] Napa — property query (opens in a new tab)
Napa County official service / referred provider · County property lookup — Specific assessment versus fee-parcel search
Source reviewed October 15, 2026View supporting excerpt
To view a "specific" assessment, please enter the assessment number. This feature may not display all outstanding assessments.