Sellers need to consider the number of bedrooms that their property is "permitted" for when they fill out the property disclosure. In the Tennessee Resiential Property Disclosure form, there is a line (#25) that reads, "If septic tank or other private disposal system is marked under Item A, does it have adequate capacity and approved design to comply with present state and local requirements for the actual land area and number of bedrooms and facilities existing at the residence?"  I have found that many sellers are unaware of how many bedrooms they are actually permitted for and simply check "Yes."