Detroit's Cobo Center through the years Cobo Conference and Exhibition Center has dominated the heart of downtown Detroit since it opened in 1960. It was built by the city of Detroit and named in honor of former Detroit Mayor Albert Cobo (1950-1957). It is shown here May 20, 1962. The Detroit News archives
Remediation costs vary depending on how much and where mold exists. Figure on: 1  $500 to $4,000 to remove mold from crawlspaces only.  $2,000 to $6,000 to remove mold from ducts, crawl spaces, walls, and attics.
Attic Conversion. Converting an unfinished attic to a 15-by-15-foot bedroom with small bath costs an average of $49,438, with a nearly 85 percent return on investment, according to a 2014 report by Remodeling. The cost of this bedroom conversion can be as much as 30 percent higher in high cost-of-living areas.ttic Conversion. Converting an unfinished attic to a 15-by-15-foot bedroom with small bath costs an average of $49,438, with a nearly 85 percent return on investment, according to a 2014 report by Remodeling. The cost of this bedroom conversion can be as much as 30 percent higher in high cost-of-living areas.