Can I extend my NON-B 90 days visa for 15 or 30 days in Thailand?

The original poster inquired about the possibility of extending their NON-B 90 days visa for either 15 or 30 days, similar to a TR 60 days visa. Responses suggest that the maximum extension available for a 90 Day NON-B visa is only 7 days, and there's no temporary extension. To apply for a longer extension, one must meet specific requirements, including having a valid work permit and financial criteria. The discussion highlights the importance of meeting immigration regulations for visa extensions.