Two firms have recently leased space totaling 10,600 square feet at the 300 Crown Colony office building in Quincy.

PKF P.C., a professional accounting and financial services firm, leased 3,230 square feet, relocating  its South Shore office from Norwell. The move occurred in early February.

MCMC LLC, a national managed-care services company headquartered at 300 Crown Colony, expanded by leasing an additional 7,371 square feet three floors above its current space, bringing its total footprint to 19,443 square feet.

The moves bring total occupancy at the 118,000-square-foot property to 95 percent – well above the market average of 80 percent, noted 300 Colony’s owner, Campanelli, a Boston-based commercial real estate and construction company.

Since purchasing 300 Crown Colony in early 2010, Campanelli, with Colliers International as its exclusive representative, has completed a total of 43,256-square-feet in lease transactions, increasing occupancy levels from 73 percent. The property has attracted seven new tenants, with three renewing commitments.

In collaboration with Peter Brown, director of leasing at Campanelli, the Colliers International team of Jim Elcock, David Goodhue and Caleb Hudak serve as the exclusive leasing agent for the property.

"Activity and deal flow has significantly increased in the Braintree/Quincy office market of late," Goodhue said. "We are fortunate to accommodate the growth of MCMC within the building and to attract first-class tenants such as PKF. Our success is a testament to the high quality of the building as well as the hands-on, full-service approach to leasing and management of Campanelli."

300 Crown Colony is a five-story, Class A office building, located in the Crown Colony Park at the intersection of Interstate 93 and Routes 128 and 3.