Assessor
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.
- 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.
Source & saved evidence
Napa County official service / referred provider · Napa — property query (opens in a new tab)
County property lookup — Specific assessment versus fee-parcel search
To view a "specific" assessment, please enter the assessment number. This feature may not display all outstanding assessments.
Agent source review: October 15, 2026 · Snapshot
5ddcbd4c0edd7b4d
Before you start · 1 requirement & conditions
- 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.
Source & saved evidence
Napa County official service / referred provider · Napa — property query (opens in a new tab)
County property lookup — Street-address search format
You do not need to enter the entire street name or the street type
Agent source review: October 15, 2026 · Snapshot
5ddcbd4c0edd7b4d
Source & saved evidence
Napa County official service / referred provider · Napa — property query (opens in a new tab)
County property lookup — Assessor parcel-data search
Directions: You can search by parcel number (begins with 0), street address, assessment number (begins with 8 or 9), or aircraft tail #.
Agent source review: October 15, 2026 · Snapshot 5ddcbd4c0edd7b4d
- Phone
- 707-253-4467