Oct 15 (Reuters) - Skanska AB
* Says invests $126 million, about SEK 1.1 billion, in new office building in Washington, D.C, USA
* Says will develop and build a 11-story, 23,000 square meters office building, which includes approximately 900 square meters of ground-floor retail.
* Says USA Building will add a contract value of $59 million, about SEK 500 million, in the order bookings for the fourth quarter 2015
* Says construction will begin in November 2015 and is scheduled to be completed in the first quarter of 2018 Source text for Eikon: Further company coverage: (Stockholm Newsroom)