For the purpose of this title all land lying outside the unincorporated area in the county is hereby organized into the following districts:

   A.   Underlying Principal Districts:

      AG-1 Rural/agricultural district.

      R-1 Rural residential district.

      R-2 Single-family residential district.

      R-3 Mixed residential dwelling district.

      R-4 Multi-family residential dwelling district.

      C-1 Neighborhood office and business district.

      C-2 Planned office and business district.

      C-3 General business district.

      I-1 Planned industrial district.

      I-2 General industrial district.

      I-3 Heavy industrial district.

   B.   Overlay Districts:

      AG-2 Concentrated livestock production district (one-half mile radius).

      AG-3 Concentrated livestock production district (one mile radius).

      TN Traditional-neighborhood district.

      PUD Planned unit development.

      DPA Detailed planning areas.

      AR Active or special recreation district.

      WS Water and steep slopes district. (Ord. 06-05-002, 6-21-2005; amd. Ord. 2025-05-006, 5-22-2025)

   A.   Boundaries Established; Classifications Shown; Restrictions:

      1.   The boundaries of the underlying principal districts established are depicted upon the official zoning classification map of the county, which map is hereby made a part of this title. The boundaries of overlay districts shall be noted on the official zoning classification map and/or on the zoning maps of the county.

      2.   Such maps, included within the definition of "zoning maps" heretofore set out, along with any notations, references and other matters shown thereon, shall be as much a part of this title as if they were fully described herein.

      3.   The official zoning classification map shall be on file and available for public reference in the office of the zoning administrator, complete with amendments which have been adopted as provided herein. Any other zoning maps shall be available for public inspection at such other locations in the county as the zoning administrator finds convenient.

      4.   Any property whose classification is not shown on the official zoning classification map, or land hereafter disconnected from a municipality, shall be classified in the AG-1 rural/agricultural underlying principal district unless otherwise classified by map amendment within ninety (90) days of said disconnection and after public hearing before, and recommendation by, the zoning hearing officer.

      5.   No building nor structure shall be erected or altered, no development shall occur on any land, nor shall any building be used for any purpose, other than a use permitted in the underlying principal district, and the overlay district, if any, in which such land, building or structure is located.

      6.   No lot which may now, or may hereafter be built upon or developed, as herein required, may be so reduced in area that no use permitted in said district in which the lot is located can any longer comply with the bulk regulations applicable to said district.

   B.   Official Zoning Classification Map Identified, Certified:

      1.   The official zoning classification map shall be identified by the signature of the chairman of the county board, attested by the county clerk and bear the seal of the county under the following words: "This is to certify that this is the official zoning map referred to in subsection 10-3-2A of the Lee County zoning ordinance of the County of Lee, Illinois" together with the date of the adoption of this title, or the latest revision thereto.

      2.   If changes are made in underlying principal district boundaries or other matters portrayed on the official zoning classification map, such changes shall be made by the zoning administrator promptly after the map amendment authorizing such changes has been approved by the county board together with the file number of the zoning petition resulting in said change. Said petitions, attested to by the county clerk, shall be filed and kept by the zoning administrator as a permanent record of each zoning change. Notice of any such changes shall also be forwarded to the board of trustees of any township, in which the property affected is located, which has established a plan commission.

      3.   The map amendment ordinance shall provide that such changes shall not become effective until they have been adopted by the county board.

      4.   No changes of any nature shall be made on the official zoning classification map, or matters depicted thereon, except in conformity with the procedure set forth in this title. Any unauthorized change of any kind by any person or persons shall be considered a violation of this title, shall not be construed as a map amendment, and shall be punishable as provided in this title.

      5.   The official zoning classification map located in the office of the zoning administrator shall be the final authority as to the current zoning status of property, buildings and structures in the county, being paramount to any purported copies thereof.

   C.   Uncertainty As To Boundaries: If uncertainty arises with respect to the zoning boundaries of the various districts as shown on the zoning maps, the zoning administrator shall determine the boundaries in accordance with the following rules:

      1.   Zoning district boundaries, unless otherwise indicated, are the centerline of streets, roadways, alleys, railroads or easements; or the boundary lines of sections, quarter sections, or an even division thereof; tracts or lots, or such lines extended.

      2.   Where a zoning district boundary line divides a lot in single ownership, the regulations of either zoning district may apply to the entire lot, but under no circumstances, shall less than fifty feet (50') in an adjoining district remain isolated in a separate zoning district.

      3.   In areas not divided into lots and blocks, the zoning district boundary lines on the zoning maps shall be determined by scale to the nearest fifty feet (50').

      4. In the AG-2 and AG-3 concentrated livestock production overlay district the boundaries shall be determined by drawing a circle, the radius of which shall be the applicable setback distance set out in 510 Illinois compiled statutes 77/35(d) or those distances set forth in the regulations regarding AG-2 and AG-3 districts.

      5.   In the water and steep slopes district the boundary lines of the district shall be defined by the SFHA boundaries as herein defined from time to time and by the soil and water conservation district maps published from time to time. (Ord. 06-05-002, 6-21-2005; amd. Ord. 2025-05-006, 5-22-2025)

All land located in the county shall be classified in one underlying principal district. The designation of any such land to an overlay district shall not remove the underlying principal district classification. Overlay districts impose additional restrictions where they are created over an underlying principal district and take precedence over the privileges and requirements of the underlying principal district. A particular parcel may be located in more than one overlay district and subject to the requirements of several districts. Designation of a parcel in an overlay district does not of itself eliminate the applicability of the provisions, performance standards or applicable regulations, relating to the underlying principal district, and the provisions of the underlying principal district control except where there is conflict. (Ord. 2025-05-006, 5-22-2025)