This project is an impressive duplex on Park Avenue in New York City, with floor-to-ceiling windows that overlook the vibrant city streets. “What I love most about the location is the convenience, within just a two-block walk, you have access to everything you could possibly need,” says interior designer Rachel Jacobs.

Her clients are a young family she’d met years prior, when she was working as an assistant at a previous design firm. “When that firm wasn’t able to take on the project, they encouraged me to step in, and the family trusted me to lead the design,” she says. “Their top priorities were creating a home that felt comfortable and functional for their children, tailoring each bedroom to reflect the kids’ personalities, and completing everything on a tight timeline so they could move in before the school year began.”

Arriving at the home, a private elevator opens into the small foyer featuring a striking concrete car-mirror-inspired piece above a custom console. Moving into the spacious open living and dining area, Rachel grounded the space with a Fayette Studio rug, a Withers Studio dining table, and mostly custom furniture. “Artwork by Bradley Duncan anchors the space,” she adds.

The layout doesn’t stick to a fully open concept, however. Just off the main room is a cozy den with a CB2 sofa, Bradley USA chairs, and a custom game table. There’s also the breakfast room—a playful, refined nook with Holly Hunt wallpaper, art by Amber Goldhammer, and Rove Concepts chairs. Additionally, there’s an office with a Missoni carpet, dark paneled walls, and a custom desk.

Rachel designed the primary bedroom to feel like a retreat, layering the space with a Fayette Studio rug, a custom bed, a large Pottery Barn chair, and refinished CB2 nightstands. “Their son’s room celebrates his love of basketball, with peel-and-stick basketball court wallpaper from Pottery Barn, a Dutton Brown light fixture, and a mix of Corey Paige and Arlette Kassin artwork,” she says. “Their daughter’s bedroom has a softer, whimsical feel with Drop It Mod wallpaper, a TOV Furniture chair, and an Anthropologie desk.”

Rachel brought a full-service approach, finishing everything within a quick six months, down to the accessories, artwork, and even dishes. “By the time they moved in at the end of summer, every bed was made, and every shelf was thoughtfully styled,” she tells us. “When the family walked in, they were thrilled, their reaction was full of gratitude and excitement, which was incredibly rewarding.”