Retail news out of Gowanus is scarce, but in something of a breakthrough, 40,000 square feet have been leased at Brodsky’s and Avery Hall’s 499 President.

The new tenants are Union Market, Corto, and Spear Physical Therapy, joining Paulie Gee’s and Royal Palms Shuffleboard.

With 10,000 square feet, Union Market is the largest of the new signings.

The  high-end grocery store at 532-542 Union St., adjacent to  the rental apartment building, will be the brand’s flagship.

Corto will be an Italian cafe along Nevins Street, next toSpear Physical Therapy.

The 499 President project with 350 rental apartments is part of the Gowanus phenomenon that has seen thousands of new homes built along the canal.