How long will my new Thai visa be valid if my passport is about to expire?

IF you are applying for a year-long, multi-entry Non-B visa (where you leave the country every 90 days) you need 18 months validity on your passport at most thai consulates to get one.

IF you are applying for a yearly extension of stay inside the country at the immigration office you need a year, because they will ONLY issue an extension for the time your passport is valid for.

There is no work visa :/ You are either on a Non-B visa where you bounce out and back in every 90 days or you're on an extension of stay where you do 90 day reporting at the immigration office. Which one do you do?

Where do you like to apply for the new Visa?