The unincorporated area of the county of Napa is divided into zoning districts, each of which is designated in this section, and each of which is identified for convenience by the letters indicated:

(Ord. 1227 § 1, 2003: Ord. 96-3 § 4 (part), 1996; Ord. 98-1 § 4 (part), 1998; Ord. 1022 § 2, 1992: Ord. 981 § 46, 1991: Ord. 702 § 2, 1981: Ord. 633 § 3, 1980: Ord. 612 § 1, 1979: Ord. 565 § 2, 1978: Ord. 560 § 1, 1978: Ord. 557 § 1, 1978: Ord. 556 § 4, 1978: Ord. 551 § 4, 1977: Ord. 549 § 3, 1977: Ord. 539 § 3, 1977: Ord. 538 § 3, 1977: Ord. 536 § 1, 1977: Ord. 531 § 4, 1977: Ord. 527 § 3, 1977: Ord. 511 § 1 (part), 1976: prior code § 12100)

(Ord. No. 1326, § 1, 9-22-2009; Ord. No. 1370, § 8, 3-20-2012; Ord. No. 1382, § 1, 6-4-2013)

The zoning districts are delineated on the official zoning map which, together with all explanatory matter entered thereon, is adopted by this reference and is declared to be a part of this title of the Napa County Code. Regardless of the existence of purported copies of the official zoning map which may from time to time be made or published, the official zoning map, which shall be maintained by or at the direction of the director, shall be the final authority as to the current zoning status of the real property shown thereon.

(Ord. 511 § 1 (part), 1976: prior code § 12101)

(Ord. No. 1370, § 9, 3-20-2012)

The official zoning map shall be identified by the county seal and the following words: "This is the Official Zoning Map of the County of Napa identified in Napa County Code Section 18.12.020."

(Ord. 511 § 1 (part), 1976: prior code § 12102)

(Ord. No. 1370, § 10, 3-20-2012)

A.

If, in accordance with provisions of this title and California Government Code Sections 65853-65857, inclusive, a change is made in a district boundary or other matter shown on the official zoning map, such change shall be entered on the official zoning map promptly after the amendment has been adopted by the board. No amendments to this title of the Napa County Code which involves matters shown on the official zoning map shall become effective until such change has been entered on the official zoning map.

B.

No changes of any nature shall be made in the official zoning map, or matter shown thereon, except in conformity with the procedures set forth in this chapter. Any unauthorized change by any person shall be considered a violation of this code and shall be punishable as provided in Section Four of Ordinance No. 436.

(Ord. 5111 § 1 (part), 1976: prior code § 12103)

(Ord. No. 1370, § 11, 3-20-2012)

A.

If the official zoning map is damaged, destroyed or lost, or becomes difficult to interpret for any reason, the director may draft a new official zoning map which shall supersede the prior official zoning map. The official zoning map may correct drafting or other errors or omissions in the prior official zoning map, but no such correction shall have the effect of amending the original official zoning map or any subsequent amendment thereof. The new official zoning map shall be identified by seal and statement as required in Section 18.12.030.

B.

Unless the prior official zoning map has been lost, or has been totally destroyed, the prior map or any significant parts thereof remaining shall be preserved, together with all available records pertaining to its adoption or amendment.

(Ord. 511 § 1 (part), 1976: prior code § 12104)

(Ord. No. 1370, § 12, 3-20-2012)

Where uncertainty exists as to the boundaries of zoning districts as shown in the official zoning map, the following rules shall apply:

A.

A boundary indicated as approximately following the centerline of a road, street or highway shall be construed to follow the centerline.

B.

A boundary indicated as approximately following a platted lot line shall be construed as following the lot line.

C.

A boundary indicated as approximately following city limits or the boundary of any special district or other political subdivision shall be construed as following the city limits or boundary.

D.

A boundary indicated as following railroad lines shall be construed to lie midway between the main tracks.

E.

A boundary indicated as following a shoreline shall be construed to follow the shoreline, and in the event of change in the shoreline shall be construed as moving with the shoreline; a boundary indicated as approximately following the centerline of a stream, river, canal, lake or other body of water shall be construed to follow the centerline.

F.

A boundary indicated as parallel to or extensions of features indicated in subsections (A) through (E) of this section shall be so construed.

G.

Distances not specifically indicated on the official zoning map shall be determined from the scale of the map.

H.

Where the location of a physical or cultural feature on the ground differs from its location on the official zoning map, and in other circumstances not covered by this section, the board shall interpret the zoning district boundaries.

I.

Letters indicating the zoning district classification of property on the official zoning map shall apply to the whole of the area within the zoning district boundaries.

J.

Where a county road, street or alley is officially vacated or abandoned, the zoning district classification of abutting properties shall be extended to the lot lines thereof located within the road, street or alley, or in the absence of any lot line so located, the former centerline thereof.

(Ord. 871 § 2, 1988; Ord. 511 § 1 (part), 1976: prior code § 12105)

Zoning district regulations shall consist of the following:

A.

Regulations set forth for each zoning district in this title, commencing with Section 18.16.010;

B.

Regulations set forth in columnar form in the Schedule of Zoning District Regulations, set forth in Section 18.104.010;

C.

Regulations set forth in this code, commencing with Section 18.52.020.

(Ord. 511 § 1 (part), 1976: prior code § 12106)

A.

Except as provided in this title, commencing with Section 18.132.010, no building or other structure, or land, shall hereafter be used or occupied, and no building or other structure or part thereof shall hereafter be erected, constructed, moved or structurally altered except in conformity with all of the regulations herein established for the zoning district in which it is located.

B.

The regulations established by this title within each zoning district shall be minimum regulations and shall apply uniformly to each class or kind of building or other structure, or land.

C.

No commercial use shall be permitted of any property located in the unincorporated area of the county other than as is specifically authorized within the provisions of Title 18.

(Ord. 759 § 8, 1983; Ord. 511 § 1 (part), 1976: prior code § 12107)