Portland, OR-based commercial real estate, developer, investor and manager Gerding Edlen boosted its East Coast holdings with the purchase of Neponset Landing in North Quincy, MA from Northwestern Mutual for $89.5 million, or approximately $320,000 per unit.

The 280-unit apartment high-rise delivered in 1997 at 2 Hancock St. along the Neponset River and adjacent to Neponset Bridge which feeds into I-93 connecting residents to downtown Boston.

The…