Waloshin.... call your local planning office, and talk to an Urban Planner. I've known a couple, and they are nice people - and will almost for sure love to talk to you. There may be some obvious education career paths, but they'll also know some of the non-traditional paths.
I think it also matters a lot where you plan to live. In the big cities, I'll bet that the requirements are higher. Cities can afford to be picky, because so many people want to live and work there.
Small jurisdictions will have a harder time - and will likely be less stringent about qualifications. Or perhaps accept a lower certificate, but then expect you to upgrade your qualifications while on the job.
In my community, I don't believe our planners have Masters... but we are not a city.
Good Luck.
ps.... you should probably note where you are, since different countries may have different expectations.
pps ... I have no idea, but I still voted.... I love polls. 🙂