Variance

A variance is official permission to deviate from a specific zoning standard — most often a dimensional rule like a setback, height limit, or lot-coverage cap. Because zoning codes are written for typical lots, a parcel with unusual characteristics (an odd shape, a steep slope, or an existing structure in the wrong spot) may be unable to meet a rule that most lots can. A variance is the mechanism that lets the jurisdiction grant relief in those specific cases without changing the underlying code.

Variances are a discretionary approval, which is what distinguishes them from by-right or ministerial approval. Rather than checking a project against fixed objective standards, a zoning board or hearing officer weighs whether the applicant meets criteria that typically include a genuine hardship tied to the property (not self-created), that the relief is the minimum necessary, and that granting it won't harm neighbors or the public interest. That discretion makes the outcome less certain and the process longer — usually involving an application, notice to neighbors, and a public hearing.

For ADU projects, the goal is often to avoid needing a variance at all: many ADU-friendly laws relax setbacks and other standards specifically so that accessory units can be approved by-right, without discretionary review. A variance becomes relevant when a desirable design can't fit the buildable envelope and the owner wants relief from a particular rule. A variance differs from a conditional use permit, which addresses the use of a property rather than its dimensions. Because the criteria, process, and likelihood of approval vary by jurisdiction and change, this is general information, not legal advice — consult the local planning department and qualified professionals before relying on a variance.