Direct-to-trade luxury furniture designer Ferrell Mittman has just moved to a new, 3,700-square-foot duplex at 228 E. 58th St. between Second and Third avenues, where it will also offer its Robert A.M. Stern line starting in 2020.

The petite glass building has 2,200 square feet on the ground floor, 1,000 square feet on the second floor, which includes an outdoor patio, and 500 feet in the lower level for storage.

The tenant relocated from the D&D building at 979 Third Ave.

Dean Valentino of ABS Partners represented the company — which has its headquarters in High Point, NC — in the 10-year lease.

Jedd Horn, Nicole Mendelson and Michael Thomas of Colliers International acted on behalf of the ownership. The rent for the building comes to $105 per square foot.

Ferrell Mittman has been in business for more than 50 years, manufacturing home furnishings in the southeast and selling directly to designers and the furniture trade.

In 2018, Ira Glazer created Design Furniture Holdings as the holding company for the Ferrell Mittman and Avery Boardman brands.

DHS also owns the sofa maker Carlyle, which sells to consumers from its space at 1056 Third Ave. at East 62nd Street.