With its expansive front room and triple-height glass-paned façade, Boerum House & Home on Atlantic Avenue offers a boutique retail experience that is impossible to find in New York. The building, which previously housed a gallery on the ground floor and frame shop above, has been repurposed by Flank, an interdisciplinary design and development firm, as a home-design store and showroom for its 71 Smith Street project around the corner. Boerum showcases more than 130 design makers working in Brooklyn, throughout the states, and around the world. Flank collaborated with Partners & Spade on branding and interior design, masterminding a store environment that not only acquaints local residents and potential homebuyers with…