Variance
Definition
A variance is permission to break a specific zoning rule, like a setback, height limit, or lot coverage requirement, because following it exactly would cause unusual hardship on that particular property.1 It does not change the zoning itself, only excuses one property from part of it.
Why it matters
Variances are decided case by case, often by an appointed board rather than elected officials, with far less public attention than a rezoning. A string of variances granted to well-connected property owners can quietly reshape a neighborhood's density or character without ever going through the more visible rezoning process.
Seen in the wild
Zoning boards of adjustment across the country routinely grant area variances for setback and height reductions on irregular lots, a pattern described in land-use training materials such as University of Wisconsin Extension's variance guidance, which notes variances are meant to be the exception, not a routine workaround for what an owner simply prefers to build.