As the economy begins to slowly turn around, job growth is fueling a higher demand for commercial real estate, according to the National Association of Realtors.  This means that formerly vacant commercial spaces are modestly being rented out.  Additionally, multifamily housing is the strongest sector of the market: apartments, duplexes, and the like represent less risk for young families as they do not come with long-term commitments like mortgages.  Areas with the lowest vacancy in such dwellings are New York City, Portland, and Minneapolis.  As renters learn to make consistent monthly payments, many hope that they will want to commit their money to single-family housing in the future.