It's fairly common to see Container Box Offices in Paid Parking Lots these days, especially around Taipei City. They're inexpensive, easy to move, and they serve a vital management function.
This particular parking lot is over in Linkou District, close to the MRT Station and an upscale shopping mall. It has all the basic amenities, such as air condtioning, electric, outside lights, as well as the necessary security. Considering that it's only a parking lot container office, they put considerable work into it.
So, hat's off to whoever designed this Container Office, it's quite decent.