CHESTNUT HILL, MASS. — Coldwell Banker Commercial NRT has brokered the $5.1 million sale of The Pearl, an 18,000-square-foot office building in Chestnut Hill, located west of Boston. The four-story property was built on a half-acre parcel in 1973 and includes onsite parking. Todd Glaskin of Coldwell Banker represented the undisclosed seller in the transaction. The name and representative of the buyer were also not disclosed.