In order to effectively carry out the provisions of this ordinance, the lands within the corporate limits of the City of Gillette shall be divided into the following zoning districts:

1. Agricultural District (A)
2. Rural Residential District (R-R)
3. Suburban Residential District (R-S)
4. Single-Family Residential District (R-1)
5. Single and Two-Family Residential District (R-2)
6. Single and Multiple-Family Residential District (R-3)
7. Multiple-Family Residential District (R-4)
8. Mobile Home District (M-H)
9. Enhanced Manufactured Home District (E-MH)
10. Enhanced Manufactured Home Suburban Residential District (E-MH-RS)
11. Office and Institution District (C-O)
12. Planned Neighborhood Business District (C-P)
13. General Commercial District (C-1)
14. Central Business District (C-2)
15. Business/Services District (C-3)
16. Light Industrial District (I-I)
17. Heavy Industrial District (I-2)

Effective on: 1/1/1901

1. The boundaries of these zoning districts are hereby established, as shown on a map entitled, "District Zoning Map, Gillette, Wyoming". This map, and all official amendments thereto, are hereby declared to be a part of this ordinance.
2. Unless otherwise defined, district boundary lines are intended to be lot lines; the centerline of streets, alleys, channelized waterways or similar rights-of-way; the centerline of blocks; section or township lines; municipal corporate lines; the centerline of streambeds; or other lines dimensioned or drawn to scale on the District Zoning Map.
3. It is the intent of this ordinance that all lands lying within the corporate boundaries shall be within one of the enumerated zoning districts. If any such land is determined not to be within one of the enumerated districts for whatever reason or cause, then no permits shall be issued for the use of the land or for the erection or alteration of any structures on the land until the area has been examined by the City Council and a zoning classification has been established within a reasonable period of time.
4. All territory which shall hereafter be annexed to the City of Gillette shall be in the R-1, Single-Family Residential District, unless otherwise designated by the City Council as a part of the annexation and zoning process. Such a zone district classification, once established, may be amended pursuant to the procedures established by this ordinance.

Effective on: 1/1/1901

1. Except in the A, Agricultural District, the C-2, Central Business District, and the I-2, Heavy Industrial District, or as otherwise provided by this ordinance, a separate ground area called the zone lot shall be designated, provided and maintained for each structure containing a permitted use or uses. Each zone lot shall have at least one front line and shall be occupied only by a main structure containing the permitted use or uses and a subordinate structure or structures containing only accessory uses. Designated zone lots in the A, C-2 and I-2 Districts may contain more than one main structure containing a permitted use or uses.
2. A zone lot shall consist of a single parcel of contiguous land and shall be designated as a zone lot only by the owner thereof. Where a designated zone lot is not owned by a single individual or entity, or where the ownership of a structure to be placed on the zone lot is different from the ownership of the land, all responsible parties shall agree and participate in the designation zone lot diagram of the zone lot. A record of the designation of zone lots shall be kept in the files of the Zoning Administrator.
3. No zone lot shall be designated unless it shall conform to all of the applicable regulations or the zoning district in which the property is located.
4. The land area occupied by a use and/or the building site designated and occupied by each structure existing on the effective date of this regulation shall be deemed the zone lot for such use and/or structure. Upon application to and approval by the Zoning Administrator, the boundaries and area of the zone lot may be amended, provided full compliance can be maintained with all of the requirements of this ordinance.
5. When a zone lot is designated and said designation involves several lots of a platted, recorded subdivision, the outside boundaries of the zone lot shall conform to the platted lot lines of the recorded plat. ⁵

Effective on: 1/1/1901

The provisions of this ordinance shall apply uniformly within all zoning districts bearing the same classification, as designated on the district zoning map; provided, however, that:

1. Where an ownership of record is divided by a district boundary line, each parcel thus created equal to or exceeding the minimum zone lot size, as established by this resolution, shall conform to the regulations pertaining to the zoning district in which each parcel is located.
2. Where an ownership of record is divided by a district boundary line, any parcel thus created which is smaller than the minimum zone lot size for the district in which it is located, may be combined with the larger parcel and used for a use permitted in the zone district in which the larger of the two parcels is located.
3. Where an ownership of record is divided by a district boundary line and both parcels thus created are smaller than the minimum zone lot size for the districts in which they are located, then the parcels may be combined and used for a use permitted in the most restrictive of the zoning districts.

Effective on: 1/1/1901