New Bangkok office supply of more than 1.2 million square metres slated for 2022-23 will put more pressure on occupancy of grade A spaces, which shrank to 84.7% in the first quarter this year, the lowest point over the past 34 quarters.

Phattarachai Taweewong, research and communication director of property consultant Colliers Thailand, said 92% of the two-year new supply or around 1.1 million sq m would be in grade A.