Five fire trucks arrived at the scene at around 7.35pm and spent some 30 minutes extinguishing the fire. The flames had originated from an uninhabited two-storey building in the compound, which is close to the German Embassy premises.
Officials have blocked Soi Sathorn 1 to traffic as they are inspecting powerlines for possible damage.
The cause of the fire had not been determined as of press time and investigation is underway.