Fact Pattern

• Claudia has been planning on building a nail salon on her property for many years.
• She's finally gathered enough financing to do so.
• She has applied for her final building permit, and the head of the city's permitting department has told her everything looks good and it should be granted very soon.
• Claudia is pumped as she's already paid an architect to design the salon and has contracted with a contractor to build it.
• The city, however, has grown tired of nail salons and rezones her property to exclusively residential before the permit is granted.

Question

• Does Claudia have a good claim that she should nevertheless be allowed to build her nail salon?