Daniel L. Helsten and Sara M. Helsten bought a four-bedroom, 3.5-bath home at 308 White House Farm Lane in Chesterfield from Donald L. Eastman and Catherine A. Eastman for $640,000 on June 20.

The Eastmans paid $675,000 for the property in May 2008. The 3,668-square-foot house was built in 2000 in North of 64. It is part of the White House Farm subdivision.

Dr. Helsten is an instructor of anesthesiology at Washington University School of Medicine in St. Louis.

He received his B.S. in biology from the University of Kentucky and his M.D. from the University of Kentucky School of Medicine. He completed his residency at Washington University-St. Louis

According to BlockShopper.com, there have been 358 home sales in Chesterfield during the past 12 months, with a median sales price of $313,000.

Address: 308 White House Farm Lane
Buyer(s): Daniel L Helsten (and wife) and Sara M Helsten (and husband)
Seller(s): Donald L Eastman (and wife) and Cahterine A Eastman (and husband)
Sale date: Jun. 20, 2011