LTR Visa Unit, Thailand Investment and Expat Services Center (TIESC)
Rama IV Rd, Lumphini, Pathum Wan, Bangkok 10330
The LTR Visa Unit operates inside the Thailand Investment and Expat Services Center (TIESC) on Rama IV Road in Lumphini, Pathum Wan. It carries a 4.6 rating from 12 Google reviews. Hours are Monday to Friday, 8:30am to 4:30pm, with weekends closed. Services are handled on site. The official BOI website and a phone line are listed for long-term resident visa applicants needing guidance.