Warning! Planning Geek stuff ahead....
Most state have a law on the books that requires municipalities to adopt a Comprehensive Plan (called a General Plan in California) that will guide local investments in transportation, schools, parks, fire trucks, hospitals, and sewer plants. Once the Comprehensive Plan (Comp. Plan) has been adopted, the municipality is supposed to revise their local zoning codes and development ordinances to bring them in line with the goals and policies of the Comp. Plan. So the Comp. Plan is the big idea, the thoughtfully considered suite of policies that should guide the finer-grained rules and regulations that developers are required to follow if they want to build something.
Here's a common problem. After going through a long string of cathartic public meetings, charrettes, visioning sessions, etc. to prepare the Comp. Plan, Downtown Master Plan, Corridor Plan, etc., the mere mortals that staff the local planning department or sit on the planning commission and the city council are kinda burned out. The unglamorous task of revising the zoning code tends to get delayed or forgotten. Sometimes there is just no money in the budget to get the zoning code revisions done.
If developer shows up proposing a project that is in line with the general policies of the new Comp. Plan but violates the specific rules of the old zoning code, the only path forward is some sort of Planned Development Permit (PD), Planned Unit Development (PUD), or some similar additional process designed to allow greater flexibility that is allowed under the letter of the zoning code. PD's and PUD's require require additional applications, additional review by the planning commission, and typically a public hearing. In the meantime, if someone wants to build some crappy project that violates the policies of the new General Plan, but is specifically allowed under the old zoning code, they could do that as an as-of-right project. That's just bullshit. Imagine how local residents who participated in all those visioning workshops for the Comp. Plan are going to feel when they see that crappy project get built.
I think that putting this statement on the front cover of every Comp Plan to save people a lot of time, money and frustration:
"WARNING! This is a feel good scam. We have no intention of actually changing the rules to allow you to build any of it without special permission and a number of public hearings with local residents who have not read this document."
If your community wants to see the vision of their Comp. Plan actually get built, get serious about changing your zoning code.