Downtown Detroit office fundamentals are improving, with increasing rents, decreasing vacancy rates, and more refinancing activity for commercial properties. Over 300,000 square feet of new office space was delivered in 2015, marking an increase in construction beyond just rehabbing existing buildings. Urban office submarkets continue to outperform suburban areas, with rents in the city up 5.1% compared to a 3.8% increase in the suburbs. Vacancy rates have also decreased more substantially in the urban core over the past year. Recent large commercial mortgage loans on downtown Detroit buildings indicate growing creditworthiness and investment in the central business district.