Phase one of the courthouse renovation started earlier this month with the replacement of the third floor windows. In the outlined renovation, the third floor is expected to house both the county and district courts. Workers from Schweitzer Woodworking of Milford are removing old glass bricks and replacing them with updated modern panes of glass. The new windows will match the windows gracing the lower floors on the rest of the structure. The workers will be installing the new windows for the next several weeks.