What Is a Zoning Variance? How It Works and When You Need One

A zoning variance is permission from a local board to build on or use a specific property in a way the zoning code would otherwise not allow. It is granted one parcel at a time, usually by a board of adjustment or board of zoning appeals, when applying the rule as written would cause a hardship tied to the property itself. A variance does not change the parcel's zoning; it excuses one requirement on one site.

How it works

Most codes recognize two kinds of variance:

• Area (dimensional) variance: relief from a measurable standard such as a setback, height limit, minimum lot size, lot coverage, or parking count.
• Use variance: permission for a use the district does not allow. Many states restrict use variances heavily, and some do not allow them at all.

The owner applies with a site plan and a written justification, nearby owners are notified, and the board votes after a public hearing, often attaching conditions.

The required findings follow a common pattern: the hardship comes from conditions peculiar to the property (shape, slope, size), the owner did not create it, the relief is the minimum needed, and the neighborhood will not be harmed. The exact test varies by state and sometimes by city. Wanting a larger or more profitable project is usually not a hardship.

What it means if you are buying or developing land

• Time: the application deadline, the notice period, and the board's calendar usually add weeks to months.
• Cost: an application fee, a survey and site plan, and often a land use attorney or consultant.
• Risk: the decision is discretionary. Neighbors can object, and the board can deny the request or add conditions.

Buyers commonly make a purchase contingent on approval. If the problem is the use and not a dimension, check whether the code lists it as a conditional use (see conditional use permit). If the use is not allowed at all, the usual route is a rezoning.

How real jurisdictions handle it

• New York (towns): Town Law section 267-b sets two tests. A use variance requires proof of unnecessary hardship on four points: the owner cannot realize a reasonable return, shown by competent financial evidence; the hardship is unique to the property; the variance will not alter the essential character of the neighborhood; and the hardship was not self-created. An area variance is a balancing test: the benefit to the applicant weighed against the detriment to the health, safety and welfare of the neighborhood.
• California: Government Code section 65906 allows variances only for special circumstances applicable to the property, such as size, shape, topography, location or surroundings, and says a variance cannot authorize a use the zone does not otherwise expressly allow. Under section 65803, that chapter generally does not apply to charter cities unless they adopt it, so they can write their own rules.
• Arizona: under A.R.S. section 9-462.06, a municipal board of adjustment may not change the uses permitted in a zoning district and may not grant a variance when the special circumstances are self-imposed by the owner. Phoenix's planning department says four conditions must exist on the property for a variance to be approved. See our Phoenix zoning guide.

How to check a specific parcel

Confirm the district and the exact standard the project cannot meet. Read the code's variance section for the test and the decision maker, and ask staff how the board has treated similar requests. Some codes let staff approve small deviations without a hearing. In Plotzy, filter parcels by zoning designation and lot size to find sites that fit without relief, and ask Zoning AI "What is the side setback in this district, and who decides variances?" for an answer with the code section cited.

Frequently asked questions

What is the difference between a variance and a conditional use permit?

A variance excuses a rule the property cannot meet. A conditional use permit approves a use the code already lists as allowed in the district, subject to case-by-case review.

Can a variance allow a use the zoning prohibits?

It depends on the state. California's and Arizona's statutes bar variances that change the permitted uses, while New York's Town Law allows use variances under a demanding four-part test. Where use variances are unavailable, the route is a rezoning.

How long does a variance take?

It depends on the board's calendar and the notice rules. Expect an application deadline, mailed or published notice, and at least one public hearing.

Does a variance transfer to a new owner?

A variance commonly attaches to the property, not the owner, but many codes say it expires if it is not used within a set period. Read the approval and the code.

Sources

The statutes, codes, and agency documents cited on this page were checked on October 4, 2026. Laws and local codes are amended often, so confirm the current text before relying on any detail. This page is general information, not legal advice.

• New York State Senate: Town Law Section 267-b. The use variance and area variance tests for towns.
• California Legislative Information: Government Code Section 65906. The variance standard and the bar on variances for uses the zone does not allow.
• California Legislative Information: Government Code Section 65803. The charter city exception.
• Arizona Legislature: A.R.S. 9-462.06. What a municipal board of adjustment may not do.
• City of Phoenix: Zoning Use Permits and Variances. The four conditions for a variance.