Apple expands roles for remaining Campus 2 contractors after shakeup

Those firms are Rudolph & Sletten and Holder Construction, a Cupertino city official told Re/code. Rudolph & Sletten has been handling work on the interior of the new complex, while Holder has been involved with electrical, mechanical, and plumbing infrastructure.

News of DPOR and Skanska being dropped first emerged earlier this month. Skanska's U.S. chief, Richard Cavallaro, explained that the issue was a disagreement "during negotiations for the revised scope of work." The Swedish firm said it expected to lose out on $800 million in revenue over the Campus 2 kerfuffle.

The disruption could have serious ramifications for the Campus 2 project, which prior to June was already a year behind schedule and $2 billion over budget. Completion is currently scheduled for late 2016, but a further delay into 2017 could be a possibility.

When it's finished, Campus 2 will house some 12,000 workers in a ring occupying 2.8 million square feet. To lessen its environmental footprint Apple is installing things like solar panels, and devoting much of the space to trees and other landscaping. "Phase 2" companion buildings are planned alongside Tantau Avenue.