There will be a lot more than this that goes into the evaluation of a commercial building loan purchase and financing. I would suggest they talk to the banker. And you should give some serious thought to counseling your client to NOT put the building in the corporation. It may look appealing now, but if the S-Corp rules go south and you end up busting the S-Election for some reason, you have a very bad situation with the real estate setting in the C Corp. There was just a question recently, here or on another listserv I subscribe to, wherein the primary shareholder had passed on, I believe, leaving the beneficiaries owning the stock of a C-corp that primarily held highly inflated real estate. Some of the benes wanted to cash out which meant selling the real estate and paying a ridiculous amount of tax, Be careful here.