High Quality Content by WIKIPEDIA articles! Portland City Hall is the headquarters of city government of Portland, Oregon, United States. The four-story Italian Renaissance-style building houses the offices of the City Council, which consists of the mayor and four commissioners, and several other offices. City Hall is also home to the City Council chambers, located in the rotunda on the east side of the structure. Completed in 1895, the building was added to the National Register of Historic Places on November 21, 1974. City Hall has gone through several renovations, with the most recent overhaul gutting the interior to upgrade it to modern seismic and safety standards. The original was built for $600,000, while the 1996 to 1998 renovation cost $29 million.