Must agree fully with both answers below. It sounds like the realtor didn't know. If he/she don't know, there is nothing to "disclose." But since the agent didn't own the property, the agent does not have the burden of disclosure. This sounds like something you should have put in the property usage section on the contract and had it verified by independent resources. Agents are not lawyers, so it's always a good idea to hire one if you've got a non-standard purchase contract or intended use. If we know, we tell, but this doesn't seem at all like the agent was in error. Sorry you had to learn this the hard way.