Legal Question in Real Estate Law in California

I'd start out by researching whether the decision to so designate it was (a) based on correct facts, and (b) made consistent with local or state law applying to such designations. You'll want to get transcripts of council meetings and copies of staff reports where the basis for the designation was researched or discussed. Due to variations in local policies and ordinances from community to community, I think you will need a local lawyer and/or real-estate professional to assist you.