The purchase price was 83 percent more than the seller, Walton Street Capital of Chicago, paid for the 22-acre property in December 2004.
Woodland Terrace includes more than 100 apartments and cottage homes for seniors. It also provides assisted-living care and care for patients with Alzheimer's.
Built in 1999 by developer Kisco Retirement Communities, it is one of the region's most lavish senior-living centers.
The price Prudential paid is evidence of the fact that the Triangle is expected to become even more of a magnet for retirees in the coming years.