The number of new residential building permits was up 1.9% compared with May 2014, the data also showed.
Residential constructions in rural areas made up for 64.1% of the new permits issued in May 2015.
New permits for non-residential buildings, including administrative structures, were at 587 units, from 559 units in April.
In the first five months, Romanian authorities issued 14,185 housing permits, up 1.9% from the same period of 2014.