The specific purposes of the :WS water setback overlay district are to:
A. 
Preserve the aesthetic and natural resource values of waterfront areas adjacent to the Napa River, and the several lagoons and marinas developed to provide improved water access, that are at risk of degradation through continued urban development.
B. 
Retain the open spaces between the top of bank and existing residential development abutting the developed waterfront that are vital to the view corridors from the water and public spaces, and contribute to the aesthetic environment of these waterfront neighborhoods.
C. 
Preserve the predominant views both from and of the waterfront areas, their present appearance, and minimize the future encroachment of buildings and structures.
(O2003-12)
The :WS water setback overlay district may be combined with any principal zoning district consistent with the purpose and provisions of this district. Regulations of the :WS district are in addition to those in the underlying district, and in the event of a conflict between the two, the provisions of the :WS overlay district shall prevail.
(O2003-12)
The following regulations shall apply to the development of any waterfront property zoned :WS:
A. 
One single-family dwelling is permitted within the setbacks and yards established by this title for any property with residential zoning.
B. 
Patios, decks, other structures and landscaping are permitted within the area between the top of bank and the single-family dwelling subject to the general standards established by this title.
C. 
An accessory building, accessory dwelling or additional detached rental unit within the area between the top of bank and the single-family dwelling is prohibited, unless authorized by use permit.
(O2003-12)
In addition to the standard materials required to file a use permit application, the following specific materials shall also be required:
A. 
A surveyed site plan with the precise location and dimensions of all existing improvements, physical features and contours, and the proposed changes.
B. 
Preliminary architectural and/or engineering plans of the proposed changes, with information about the materials and colors.
C. 
A location plan showing the applicant's property and each adjoining property with the approximate location of the existing improvements and physical features on these adjacent properties.
D. 
Other information, plans or studies which are deemed by the Community Development Director to be necessary to accurately assess the application.
(O2003-12)
To approve a use permit for an accessory building, accessory dwelling or detached rental unit in the area between the top of bank and the existing dwelling, the Planning Commission shall make the following finding:
The proposed accessory building, accessory dwelling or detached rental unit in the area between the top of bank and the existing dwelling has been located and designed so that it preserves the predominant views both from and of the waterfront and the pre-existing appearance of the neighborhood.
(O2003-12)