The IRS Office is located in high rise commercial office building complex, called the 1999 Broadway. The office is located in the Downtown Denver Business District. The office has a catchy architectural language, prestigious tenants, gorgeously maintained surroundings and a very convenient location. All the IRS Office visitors should be able to easily locate the office in the heart of Denver. The construction of 1999 Broadway completed in 1985. It has 43 floors and 680,227 total square feet.