National portals own the head terms; the Miami 21 questions are still open
The searches worth your effort are the ones a national database cannot answer from a spreadsheet.
Type the broad category phrase and you get portals, aggregators and the institutional brands. Those results are defended by domains with a decade of authority and budget behind them. A regional brokerage that sets that phrase as the goal spends a year producing pages that never surface.
Look instead at what needs local judgment. The City of Miami is zoned under Miami 21, a form-based transect code enacted by Ordinance 13114 in 2009, which orders land by transect zone from T3 through T6 according to physical character rather than use alone. An owner comparing two parcels, or a user working out whether a site suits them, gets nothing usable from a national listing site, because the vocabulary itself differs from the conventional zoning used in neighboring municipalities.
Build one page per real question, written by someone who has actually taken a project through review. Keep the language careful: say generally, describe what usually applies, and tell the reader to confirm current requirements with the city or their own counsel. Confident writing about a code you do not administer is the fastest way to lose a sophisticated reader.
Order the work by what your brokers already answer on the phone every week. If three people asked the same thing this month, that question has search volume you can feel without a tool telling you so.