Burlington Summit is a master planned 640,000 square foot first class office park including lab and retail space. The first phase, 160,000 square feet, was developed as a build-to-suit for Siemens. A 90,000 square foot expansion was subsequently completed in 1999. The latest additions include 350,000 square feet of first class office and lab created for the Merck Millipore headquarters along with additional office and retail space at 50 and 100 Summit Drive. Burlington Summit is the corporate headquarters for The Gutierrez Company.