The sale is part of the troubled Telecom's effort to raise money and cuts costs. Qwest has more than $26 million in debt.
Company officials say the buildings are unneeded as Qwest moves workers into other buildings.
Real estate brokers with Grubb and Ellis which is handling the sale say the suburban office buildings south of Denver are part of a portfolio of 12 properties primarily throughout the Midwest that Qwest has offered for sale.
Qwest put the package of buildings up for sale in late July and set a bid deadline of last week. Other buildings listed for sale are in Iowa, Nebraska and Minnesota.