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Property & Land Use
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Assessor Parcel Data
The Assessor Parcel Data eService provides information about a parcel. The information is based on your Fee Parcel number. The information provided is intended for personal use only. For questions about this eService please contact the Napa County Assessor.
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Code Online
Municode has the full listing of Napa codes as they pertain to health, animal, public safety, building, and more.
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Current Projects
Find planning, building, and environmental documents for current projects submitted to the Planning, Building and Environmental Services Department.
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Code Complaint Form
Complete and submit this form to inform the Planning department of a code violation.
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Filed Map, Assessor Parcel Map & Corner Search
You can search for Napa County maps filed with the County Recorder by title, date filed, map data (map type, book number, page number), by map number or by location. Alternatively, you can search for a Napa County Corner Record by number or location. Corner Records facilitate the perpetuation of monuments originally shown on previously recorded maps. Corner Records are filed and indexed by the County Surveyor.
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GIS Public Browser
This online service allows users to interact with a Geographic Information Systems map of Napa.
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GIS Data Catalog
The GIS Data Catalog lists all the published GIS data that is in our database. If you want a large quantity of data such as the aerial photography, you can also request the data on DVD or on an external hard drive.
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GIS Road Information
See road closures and traffic detours for Napa County using this interactive map.