Thailand halts construction on 49 data centres pending new oversight rules

In a Bangkok permit office, a building that will draw tens of megawatts and millions of litres of cooling water can go in the same box as a shed full of pallets ^[11]. Bangkok governor Chadchart Sittipunt described that gap to reporters after complaints about a data centre going up next to a hospital: the facilities can apply for their permits as warehouses, and he said there should be some environmental impact review of them ^[10]. Bangkok paused approvals on three more projects on the back of that case ^[9]. Filed as storage, a project triggers no review, and there is no register of data centres for anyone to add it to ^[12].

So the tally is strange. Thirty-five running, 49 frozen mid-build, 117 waiting on investment approval ^[1][2] adds to 201 buildings in the file, of which about 17 percent are actually operating ^[19]. The halted set is 14 larger than the operating fleet ^[18].

The Board of Investment approved 88 AI and data centre projects worth 886 billion baht in the first half of 2026 ^[5], which averages a little over 10 billion baht each ^[20]. Set that against the 623 billion baht of tech investment recorded across the whole of 2025 ^[13] and the half-year figure is 1.42 times the prior full year ^[21], though the two counts are not the same category and Bloomberg's reporting places them side by side rather than as a like-for-like. TikTok System (Thailand) was cleared in May to expand hosting, servers and storage ^[14], and Google, Amazon and Microsoft have all been building regional capacity in the country, drawn by costs below the global average ^[6].

Two remedies are on the table: higher electricity rates for large operators, and closer scrutiny of projects in densely populated areas ^[8]. The tariff addresses something real, since coal and gas supply roughly 70 percent of generation across the region's six largest data centre markets, according to figures cited by Brian Wong, Boris Babic and Nikola Ilovski in Fortune ^[16]. But nothing in the reporting shows a Thai project blocked for want of power. What produced the freeze was a permit class and a hospital next door ^[10].

Ekniti Nitithanprapas said the decision does not mean Thailand is closing the door to data centre investment, because the industry matters to the country's competitiveness, and that the government wants clear and consistent standards ^[7]. Danucha Pichayanan of the National Economic and Social Development Council said the regulations due within a month will put uniform oversight over facilities already running as well as those being built ^[4]. That scope already includes at least one commissioned Thai data centre, under regulations that do not yet exist.

Capacity teams tend to treat the constraint as available megawatts and an interconnect date. The Thai file shows the actual constraint was different: a planning category that predates the load, plus somebody who noticed the building. The useful sort has two axes. Down the side, does the permit class you filed under describe the load you will actually draw. Across the top, is the building visible from somewhere residents care about, like the Bangkok hospital. If the permit is honest on the first axis, a rules rewrite is just paperwork. If the building is invisible on the second, nobody convenes a commission. The 49 sat in the wrong quadrant on both, and the 117-project queue is where the new rules land ^[2].