Casper, WY Building Setbacks & Zoning: Setback Rules (2026)

Casper's R-1 Residential Estate district, reserved for 'large homes on large lots' under section 17.28.010, carries its own dimensional standards in section 17.28.040. Subsection (D), Yard Requirements, sets a front yard setback of fifteen feet where the lot has alley access, or eighteen feet where it does not, a rear yard setback of ten feet, and a side yard setback of five feet. Corner and through lots get an added protection: subsection (D)(4) requires that the front yard along either street frontage be no less than fifteen feet, regardless of the alley rule.

These setbacks sit alongside the district's other minimum standards: subsection (A) requires a minimum lot area of nine thousand square feet for single-family dwellings and three acres for churches, subsection (B) sets a minimum lot width of seventy-five feet, and subsection (C) caps a cul-de-sac at six lots when the turnaround radius is fifty feet. The setback figures apply to principal structures; accessory buildings and other zoning features such as height and lot coverage are addressed elsewhere in Title 17. R-2, R-3, and R-4 use the same fifteen-or-eighteen-foot front, ten-foot rear, and five-foot side formula under sections 17.32.040, 17.36.040, and 17.40.040(C), so R-1's real distinction from those denser districts is its larger nine-thousand-square-foot lot minimum and seventy-five-foot lot width rather than tighter yards.