Permitted building setbacks shall be established to conform
to health, safety and welfare requirements, preserve natural beauty,
reduce flood hazards and avoid water pollution.
[Section 59.692(1n), Wis. Stats.] A setback less than the seventy-five-foot
required setback from the ordinary high-water mark shall be permitted
for a proposed principal structure and shall be determined as follows:
A. Where there are existing principal structures in both directions,
the setback shall equal the average of the distances the two existing
principal structures are set back from the ordinary high-water mark,
provided all of the following are met:
(1) Both of the existing principal structures are located on an adjacent
lot to the proposed principal structure.
(2) Both of the existing principal structures are located within 250
feet of the proposed principal structure and are the closest structure.
(3) Both of the existing principal structures are located less than 75
feet from the ordinary high-water mark.
(4) The average setback shall not be reduced to less than 35 feet from
the ordinary high-water mark of any navigable water.
B. Where this is an existing principal structure in only one direction,
the setback shall equal the average of the distance the existing principal
structure is set back from the ordinary high-water mark and the required
setback of 75 feet from the ordinary high-water mark, provided all
of the following are met:
(1) The existing principal structure is located on an adjacent lot to
the proposed principal structure.
(2) The existing principal structure is located within 250 feet of the
proposed principal structure and is the closest structure.
(3) The existing principal structure is located less than 75 feet from
the ordinary high-water mark.
(4) The average setback shall not be reduced to less than 35 feet from
the ordinary high-water mark of any navigable water.
[Section NR 115.05(1)(b)2, Wis. Adm. Code] Buildings and structures
to be constructed or placed in a floodplain shall be required to comply
with any applicable floodplain zoning ordinance.