A Hingham-based investor has paid $2.4 million for a 4,390-square-foot retail building in Hingham Square.

Cayton Capital Advisors acquired 140-150 North St., which is 100 percent leased to boutique retailer La Petite Maison and the Square Cafe, from Giarrusso Realty LLC of Hingham.

Hingham Institution for Savings provided $1.5 million in mortgage financing.

Newmark Knight Frank’s capital markets team represented the seller.

Situated a half-mile from Hingham Harbor, the property has 36,400 people living within 3 miles of it, with average household incomes of $141,300, according to Newmark Knight Frank.

“The ability to acquire a piece of Hingham’s historic downtown rarely becomes available,” Newmark Senior Managing Director Justin Smith said in a statement. “As expected, this generational opportunity generated significant private capital interest.