Image courtesy of The Hamilton Co.

Allston-based Hamilton Co. acquired a 396-unit apartment complex in Belmont from the original developers for $175 million.

KeyBank Real Estate provided a $67.5 million bridge loan for the Hill Estates transaction.

The Hamilton Co. will take over property management and maintenance functions, and plans “significant capital improvements,” including renovations of all units. The 14.7-acre property includes 92 townhouse-style units and mid-rise buildings containing 304 units.

The transaction also includes two small office buildings at 26 Brighton St. and 90 Concord Ave., which the Hamilton Co. announced that it plans to market for sale.

Brothers Silvio, Rocco, Joseph and Charles DiGiovanni developed the complex in the 1960s, owning and managing the property until this week’s transaction.

This week’s acquisition gives Hamilton Co. a portfolio of nearly 6,000 residential units in Greater Boston.

CBRE represented the DiGiovanni family in the sale.