How much should a 400-480 sq ft addition cost in Baltimore County, Maryland?I'm looking to add a master bedroom suite (bedroom, closet, bathroom) over an existing 1st floor structure that meets the requirements to have a 2nd floor on top. Total area would be 400-480 sq ft, depending on how far across we come.Nothing terribly tricky with roof lines or other complexities. Just looking for an idea of what a middle of the road quality addition should cost on a $/sq ft estimate.February 21 2012 - Baltimore00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.