According to one U.S. District Court (N.D. Iowa), there is no right to a jury trial on the issue of whether a land use ordinance is constitutional. The decision applies City of Monterey v. Del Monte Dunes at Monterey, Ltd., 526 U.S. 687 (1999). In Doctor John’s Inc., v. City of Sioux City, a case involving the regulation of the plaintiff’s “adult” store, the district court held that the City has no Seventh Amendment right to trial by jury on the issue of whether its ordinances are constitutional.
The court’s decision can be found here (pdf).