does anyone here know about the immigration fees to convert a tourist/transit visa to a NON Immigrant visa?

to the best of my knowledge you cant in thailand change a tourist to a B (?)

you will have to go outside the country and get a B and then the cost will depend on the consulate where you get it and then transport...........

I think if you do a search here you'll find it's doable, but like most things in Thailand it's far easier SAID than DONE. So I expect you'll have to do a run. I don't think a 30 day stamp in Visa is doable though has to be an applied for tourist Visa.

30 days stamp can not be converted. A 60 days tourist visa can be changed to a Non-Immigrant visa of desired flavour. I have been unable to confirm the charges though. Maybe someone can fill in here...

I beleive you can convert from Tourist to Non Imm here.

I did it today as part of getting my retirement visa.

I was told I could not get a 1 year extension to my

Tourist Visa and had first to convert to a Non Imm

on the 2nd floor at Immigration/SuanLu.

Cost was 1900B for the new 30 days plus conversion.