Mistakenly-issued approvals do not bind a local zoning authority.
Harmon City, Inc. v. Draper City
Distinction between legislative and administrative functions.
Morrison v. Horne
Mistaken characterization does not establish zoning estoppel.
Salt Lake County v. Kartchner
Estoppel, waiver, or laches generally not available as a defense, except in exceptional circumstances.
Save Our Canyons v. Board of Adjustment of Salt Lake County
Discusses criteria for variances.
Stucker v. Summit County
Mere ownership or purchase of land does not constitute a substantial change in position sufficient enough to invoke zoning estoppel.
Vial v. Provo City
Rebutting a presumption of abandonment of a nonconforming use.
Utah County v. Young
When “zoning estoppel” may be established.
Utah County v. Baxter
Zoning estoppel only available in extraordinary circumstances.