Thinking about adding a room into property does it need a window?

[Eunice Villarroel]

 I’ve been hearing that appraisal law has been changing And would like clarification on this matter. I am thinking of converting a huge living room space in one of my properties Into an additional bedroom. Tenants have already gone ahead and made a faux bedroom by installing a curtain that wraps around the living room space turning it into a decent size room. Sing this made me wonder if I just add some drywall it really could become a nice sized bedroom turning the property into a three bedroom rather than a two bedroom. However it does not have a window. I’ve been hearing mixed information on this and would like some clarification if I do need to have a window in order for the space to be classified as a room or if just lighting will do. Also what other qualifications does it have to meet in order to be classified as a room in an appraisal?