Buffalo Medical Group, the region’s largest independent medical practice, is tripling the size of its Southtowns office, moving to a new building that will be constructed on the site of a former farmer’s market in the Village of Orchard Park.

The Buffalo-based group will construct a 45,000-square-foot medical office building at 3900 N. Buffalo St., just down the street from the center of the village, next to a large veterinary hospital and across from a relatively new retail plaza that includes Panera Bread and Jos. A. Bank Clothiers.

It replaces its existing 14,000-square-foot facility at 3345 Southwestern Blvd. in the Town of Orchard Park, where the practice has been operating in leased space for years but no longer has adequate room.

“This allows us to have our own facility, which is much larger than our current facility,” said spokesman Joseph Martone. “We’re really jammed in. We’re out of space, and this allows us to provide expanded services to the Southtowns, which is an important market for us.”

Besides having ownership of its new location, the move will enable the medical practice to expand its services in the area beyond basic primary and specialty care to include expanded multi-specialty care, additional primary care and cancer care, and ancillary services, such as otolaryngology, diagnostic imaging and diagnostic cardiology. About 24 doctors currently practice in Orchard Park.

“The new building will provide an enhanced patient experience because it will allow us to care for patients in a more efficient manner,” said Daniel J. Scully, BMG’s CEO.

The new two-story facility will become Buffalo Medical Group’s centralized hub in the Southtowns and its third comprehensive location after its main sites at 85 High St. on the Buffalo Niagara Medical Campus – where it has been since its founding in 1946 – and at 295 Essjay and adjacent buildings in Williamsville, which date back to the late 1980s and early 1990s.

Williamsville is the group’s largest location in patient volume, followed by High Street and Orchard Park, but officials expect that Orchard Park will grow to a similar volume to High Street after the expansion.

“It’s exciting news for us,” Martone said. “It replicates what we have at 295 Essjay and High Street. It’s been in the works for a number of months.”

The property was formerly owned by Saville Farms, which operated a farmers’ market on the site. The new building will be two floors but will incorporate the shell of the old building, Martone said.

Buffalo Medical Group bought the property from Ellicott Development Co. for $1.4 million. The medical practice and its development team – McGuire Development Co. as project consultant, Ellicott as construction manager and Carmina Wood Morris PC as architect – are now working with town officials to obtain site plan approval, which is expected shortly. Plans call for the group to move to the new site in the first quarter of 2014.

“With this exciting expansion in Orchard Park coupled with our additional facilities, Buffalo Medical Group remains well positioned to care for the diverse medical needs of our patients throughout Western New York,” Scully said.

Buffalo Medical has 106 doctors in 19 satellite locations and the three comprehensive sites. The practice, among the oldest and largest in the state, recorded more than 475,000 outpatient visits in 2012.