Relative to the visa requirements...Is a foreigner (Living in Singapore) who owns a condo here in BKK legally allowed to rent it out? This would generate income and may not be appropriate the owners visa status, also as a foreigner the Tabien Baan is gonna be blue? So that would mean they were unable to file a TM30 online?
TLDR : Answer Summary
Yes, a foreigner who owns a condo in Bangkok is legally allowed to rent it out, regardless of their visa status. They can also use the online TM30 system to file for their tenants. However, it is advised to consult a lawyer to ensure compliance with local regulations, especially concerning lease agreements.