Fitchburg, WI Building Setbacks & Zoning: Lot Coverage Limits (2026)

Fitchburg City Code § 22-58(8) sets the R-L Low Density District's maximum lot area coverage and buildings at 35 percent, one of nine dimensional standards listed in § 22-58 alongside minimum lot area, width and setbacks. The same 35 percent ceiling applies in the R-LM Low to Medium Density District under § 22-92(8) and in the R-H High Density District under § 22-146(9). The Rural Density (R-R) district is far more restrictive: § 22-208(8) limits lot coverage there to ten percent, reflecting its larger minimum lot sizes and agricultural character.

The zoning administrator counts principal structures, detached garages and storage buildings toward the cap; § 22-56(5) also folds detached gazebos and screen enclosures into 'maximum lot coverage rules,' and ground-mounted solar arrays are exempt from the coverage limit under § 22-8(c) only where the ground beneath them keeps vegetative cover. Developers pursuing a planned residential cluster can exceed the standard cap: § 22-217(d) lets the plan commission approve coverage up to 40 percent as part of a conditional-use cluster approval, but only where the project meets the cluster-housing design and deed-restriction standards spelled out in the rest of § 22-217.