Not all of these changes have thrilled everyone. Residents of Birdland, an 877-home neighborhood, have been particularly vocal. They have complained about early-morning construction rigs that beep and rumble along major streets, unpredictable road closings, unsightly green sheeted barriers and construction potholes that result in punctured tires.
When her car was covered with construction dust, Sheri Nielsen, Mr. Nielsen's wife, contacted Apple. The company sent carwash certificates.
Mr. Whisenhunt said the company strove to answer every complaint it received, "and if the issue is serious enough, I will personally visit to see what is going on."
In the design phase, he said, Apple hosted more than 110 community gatherings for feedback. Birdland was addressed in late 2012 and early 2013 and was given information about what would be happening over the next three years of construction. Apple published community mailers five times and sent them to 26,000 households.
Homestead Road, the thoroughfare that separates Apple Park from Birdland, became its own subject of debate. Cupertino officials wanted to construct a tree-lined median to calm traffic. Apple offered to cover the costs.
But homeowners objected. Residents complained that the island would eliminate one lane, backing up the heavy traffic even more. When 20 or so neighbors approached a Sunnyvale town meeting in solidarity, the city ended up siding with the residents.
The price of property in the neighborhood has also become a source of some worry. Sunnyvale and Cupertino, like many other Silicon Valley towns, have had an extended real estate boom, as the tech industry has expanded. Prices in the area really started to rise, real estate agents and residents said, after Apple released its plans.
A three-bedroom, two-bathroom, 1,400-square-foot ranch-style house that cost $750,000 in 2011 has doubled in price. Since Apple said it was moving into the former Hewlett-Packard site, prices have moved up 15 to 20 percent year after year, said Art Maryon, a local real estate agent. Today, bidders usually offer 20 to 25 percent over the asking price.
Birdland is already drawing Apple employees, replacing homeowners who have cashed out to move to quieter regions. Those who remain are realizing that life will not be the same when all 12,000 of the Apple workers go in and come out on a daily basis. People in the neighborhood dread the increased traffic and expect workers to park in front of their homes since there will be fewer available spaces in the company garage.
Apple's answers to concerned residents will continue, Mr. Whisenhunt said.
"When you tell people what is upcoming, some of the anxiety they have calms down a lot," he said.
And yet, he acknowledged, "you don't make everyone happy."