What is a 'circuit house'? I think it's mainly an Indian term.?

Answer 1

You are partially correct...lots of these houses are found in india, but it's a British colonial term.

during colonial times, officials would go on extended tours of their assigned provinces, to undertake duties or conduct inspections. the travel itenary or route would be called a "circuit"
The Govt. guesthouses built to serve as temporary residences on this route were thus called circuit houses. The houses were often lavish, with well furnished rooms, fully stocked and equipped kitchens, and a manicured garden out in the front. there would be a guard or "chowkidaar" who could double up as a cook and washerman for visiting officers.

Answer 2

It is like a Guest House, usually meant for temporary residential accommodation for visiting Government high officials. These were constructed during British time in erstwhile India.