Assessed values, parcels and assessment appeals.
9 reviewed links · Napa
Napa, California
County context for browsing. Agency service areas may differ.Official assessor maps and property information. Read the office’s current requirements before continuing.
Office guide →Napa County · Napa County — assessor (opens in a new tab)
Service link: Assessor Parcel Maps - Subscription Only
Assessor Parcel Maps - Subscription Only
Agent source review: October 12, 2026 · Snapshot 5fc0cd93d5a10427
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.
Office guide →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
Napa County appeal process and application resources. An unresolved Assessor review can proceed to the Appeals Board; residential and other-property filing fees differ.
Office guide →Napa County · Napa — assessment appeals information (opens in a new tab)
Assessment appeals — Assessment appeal process and county application
Napa County Assessment Appeals Board
Agent source review: October 15, 2026 · Snapshot 39a2bbb0cacaf052
County directory of additional appeal documents.
Office guide →Napa County · Napa — assessment appeals information (opens in a new tab)
Assessment appeals — Assessment appeal documents and filing resources
Assessment Appeals Documents
Agent source review: October 15, 2026 · Snapshot 39a2bbb0cacaf052
Shared California state guidance. Follow the official programme conditions and the responsible county’s instructions; this entry does not establish individual eligibility or confirm an active local auction.
Office guide →California State Board of Equalization · Homeowners exemption (opens in a new tab)
Homeowners’ exemption: state guidance and local assessor filing
To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. The claim form, BOE-266, Claim for Homeowners' Property Tax Exemption, is available from the county assessor.
Agent source review: October 26, 2026 · Snapshot 79662b9866706681
Shared California state guidance. Follow the official programme conditions and the responsible county’s instructions; this entry does not establish individual eligibility or confirm an active local auction.
Office guide →California State Board of Equalization · Proposition 19 (opens in a new tab)
Proposition 19: transfer rules and filing checklists
Proposition 19 – The Home Protection for Seniors, Severely Disabled, Families, and Victims of Wildfire or Natural Disasters Act
Agent source review: October 26, 2026 · Snapshot 4947db3f55d8ab99
Shared California state guidance. Follow the official programme conditions and the responsible county’s instructions; this entry does not establish individual eligibility or confirm an active local auction.
Office guide →California State Board of Equalization · Supplemental assessments (opens in a new tab)
Supplemental assessments and separate tax bills
The supplemental roll provides a mechanism for placing property subject to Proposition 13 reappraisals due to change in ownership or completed new construction into immediate effect. Changes in ownership or completed new construction are referred to as 'supplemental events' and result in supplemental tax bills that are in addition to the annual property tax bill.
Agent source review: October 26, 2026 · Snapshot 76813228503f6709
Officially linked county property-map resource. This verifies the referral and stated label; interactive layers, parcel results, legal boundaries, buildability and application eligibility are not determined here. The official referral labels this resource subscription-only.
Office guide →Napa County · Napa County — assessor (opens in a new tab)
Official property-office map referral: Assessor Parcel Maps - Subscription Only
Assessor Parcel Maps - Subscription Only
Agent source review: October 26, 2026 · Snapshot 5fc0cd93d5a10427
Officially linked county property-map resource. This verifies the referral and stated label; interactive layers, parcel results, legal boundaries, buildability and application eligibility are not determined here.
Office guide →Napa County · Napa County — assessor (opens in a new tab)
Official property-office map referral: Geographic Information Systems (GIS)
Geographic Information Systems (GIS)
Agent source review: October 26, 2026 · Snapshot 5fc0cd93d5a10427
These 0 profiles are classified under this topic by California’s official state service directory. The county filter above does not establish local eligibility for them. Confirm availability and requirements on the official profile.
No state-directory profiles mapped to this topic. This does not mean no state service exists.