Burlington-based Linear Retail Properties LLC has purchased a condominium on Charles Street for $1.65 million. The seller was 145 Charles Street Trust.

The 2,953-square-foot property, located at 145 Charles St., was built in the late 1800s. The King & I Thai Restaurant has occupied the ground level of the building for more than 27 years.

“This acquisition further increases our investment in the Beacon Hill neighborhood. Linear Retail is seeking to acquire additional retail properties in Boston and other cities and towns in Eastern Massachusetts,” Aubrey Cannuscio, Linear Retail’s partner of acquisitions said in a statement.

Seller 145 Charles Street Trust had owned the property for almost three decades.

“After nearly 30 years of ownership, I am happy to see that the property will remain in good hands,” William Braucher, a principal of 145 Charles Street Trust, said in a statement.