TIESC at One Bangkok at a glance
TIESC is the Board of Investment's consolidated investment-and-expat service centre, and it is the single most useful government address in Bangkok for the visa categories BAANLYY's tenants most often hold. It merges two offices that expats and corporate relocation teams previously had to visit separately — the One Start One Stop Investment Center (OSOS) and the One Stop Service for Visa and Work Permit — and puts the BOI, the Immigration Bureau and the Department of Employment under one roof.
It began serving the public on 17 March 2025 and was formally inaugurated on 31 March 2025, replacing the former Chamchuri Square premises. The centre occupies the 6th and 7th floors of One Bangkok's PARADE Zone on Rama IV Road. Applications are submitted and tracked through a Single Window for Visa and Work Permit, so a case no longer has to be filed separately with each agency.
Address: One Bangkok, PARADE Zone, 6th and 7th floor, 1877 Rama IV Road, Lumphini, Pathumwan, Bangkok 10330
Hours: Mon–Fri on standard Thai civil-service hours; the BOI's own launch announcement publishes the address and telephone but not counter times — confirm on +66 2209 1100 before travelling
Nearest station: Lumphini (MRT Blue Line) Exit 1; also reachable from Ploen Chit (BTS Sukhumvit Line) Exit 2 via the One Bangkok EV shuttle bus
What's handled here
- Visa extensions, changes of status, residence permits and 90-day reporting at the Immigration Bureau branch on the 6th floor, for eligible users
- Work permits and employment notifications through the Department of Employment on the 6th floor, for BOI-promoted companies and other eligible groups
- BOI One Start One Stop Investment Center (OSOS) investment consultation and government liaison on the 7th floor
- Expatriate Services Division on the 7th floor — BOI Visa, Long-Term Resident (LTR) and Smart Visa support, including a dedicated LTR and Smart Visa Lounge
Notable facts
- TIESC is not a general-public immigration office. Its Immigration and Employment counters serve eligible groups — chiefly BOI-promoted companies, LTR and Smart Visa holders and other qualifying professionals. Retirement and marriage extensions for the wider expat population are still handled at Chaeng Wattana.
- The 7th-floor LTR and Smart Visa Lounge is the practical point of contact for the Wealthy Pensioner, Wealthy Global Citizen, Work-from-Thailand Professional and Highly-Skilled Professional categories — the four that account for most long-lease enquiries we see from LTR applicants.
- LTR Visa applications can also be filed through VFS Global's digital platform, so an in-person visit is not always the first step.
- Location is a genuine tenant consideration: One Bangkok sits at the Rama IV and Wireless Road corner, so a Lumphini, Sathorn, Silom or Ploen Chit address puts this centre within a short ride of home.
BAANLYY does not represent or speak on behalf of Thailand Board of Investment, with the Immigration Bureau and the Department of Employment. Hours, required documents and procedures can change — always confirm current details on the agency's own official site before visiting. Visit the official TIESC at One Bangkok website →
Sources & References
Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.
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