Re: Allowed height of buildings in Washington, D.C.
The Height of Buildings Act [1910] is a federal law that applies citywide and that sets uniform maximum building heights throughout the District. The Act establishes the principle of relating the height of buildings to the width of the adjacent street.
Heights on residential streets are determined by the width of the street, up to 90 feet (approximately 7 to 8 stories).
For commercial streets, heights are determined by the width of the street plus twenty feet, up to a maximum of 130 feet (approximately 10-11 stories).
The law permits the north side of Pennsylvania Avenue, NW between the U.S. Capitol and the White House to rise as high as 160 feet (approximately 12-13 stories). The south side of the avenue houses mostly federal and landmarked buildings such as the Old Post Office.
Thanks for the details, I am now corrected. Never been there so have not seen with my eyes.