The Danbury Planning Department has approved plans to convert the Paul Mitchell School into a 40-room hotel.  The next step is for permits to be obtained for work on the 2 National Place property.  The site is located in the Downtown Revitalization Overlay Zone and the Central Business District, which is zoned for hotels.  The three story building would get a first floor addition and a patio area.  The drive-thru area would be enclosed, according to plans analyzed by the Newstimes.  Paul Mitchell cosmetology school would relocate.