in your mortgage papers that say you cannot rent...you must be
a prime resident there (CHFA loans).
You might want to call your insurance company to put
more liability coverage on your home.
There is no law that requires you to notify the lender. In fact at the closing you most likely signed an accupancy affidavit, which stated that you intended to occupy the property for at least 6 months. So as long you have been there over 6 months you can do what you like with your home.
I would stongly recommend that you inform your insurance company and change your policy to cover the liablility of tenants in your home. This most likely will cost you more, but if anything happens it is more than worth it. Do this before you negotiate your rent so that you can account for the increase in cost and you will be all set.
The bottom line... after 6 months as long as the lender is getting their money they don't care!