LOUISVILLE - ConocoPhillips Co. has purchased another 9-acre site just north of its intended new 432-acre campus in Louisville to improve access.

The Houston-based energy company purchased 9450 Paradise Drive from the Lois A Gambell Revocable Trust for $2 million, according to Boulder County public records.

The 9.49-acre property with a 3,000-square-foot home sits northwest of 96th Street and the Northwest Parkway. In February, ConocoPhillips purchased the vacant 9.14-acre property next door at 9550 Paradise Drive for $1,055,500.

Louisville city officials said ConocoPhillips had been negotiating with landowners in the area to acquire property for future transportation improvements and improved access to its campus.

ConocoPhillips purchased its 432-acre campus in Louisville from Sun Microsystems Inc. in early 2008 for $58.6 million. The company plans to open its first buildings in 2013.