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When you’re raising teenagers in New York City, making the most of your space is a necessity. For our Battery Park City clients, the solution came in the form of a rare opportunity to purchase the apartment directly above their existing townhouse to create a full three-story residence. Their goal was to give their two sons more independence, expand overall functionality, and elevate long-term resale potential. With Gallery guiding the full design-build process from DOB approvals to structural steel support to interior integration, the result is a family-friendly vertical combination that now feels intentional, cohesive, and undeniably custom.
The focal point of this Lower Manhattan renovation is the new interior staircase, bridging all three levels and redefining the home’s flow. Offering more than connectivity, the staircase became a bold architectural feature, anchoring every level of interior with clean-lined railings and contemporary detail.
To support the vertical combination, the Gallery team installed a steel beam on the second floor, seamlessly tied into the design with soffits and closets to preserve flow, while exposed in certain areas for an industrial touch. This behind-the-scenes reinforcement allowed the expanded structure to integrate appropriately without compromising aesthetics. For more information on our approach, view this explanatory video of the vertical combination process from our project manager Miguel via our IG account, along with more details on how Gallery masters the vertical combination process from our fearless leader, Avi.
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Teenage boys are a lot to wrangle, almost always requiring more space than anticipated. Thankfully, our expansive renovation delivered just that, offering a new third floor that introduced two dedicated bedrooms, designed to give them privacy and independence, while still keeping them close enough to hear the call for dinner.
Their shared third-floor living area is equipped with built-ins and a dedicated hangout zone, while a barn door appropriately repurposes the former apartment entrance into a functional design feature. Together, these additions gave the family more breathing room without leaving their beloved Lower Manhattan home by the Hudson.
To accommodate the new staircase, portions of the second floor near the primary suite had to be reframed. This necessity also opened the door for better circulation and layout efficiency.
This structural layout adjustment also allowed to transform what was once a small bay window into a multi-purpose office/gym, enclosed with a custom iron-and-glass partition. This clever detail not only maximized square footage but also introduced a striking design that maintains natural light while still providing separation. Fitness and focus, what a combination.
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Vertical combinations can easily feel disjointed, but Team Gallery approached every detail with cohesion top of mind. The newly installed white oak flooring from PID on the third floor was carefully matched to the second-floor finishes, creating a seamless look across all levels. Custom P-Tech covers were custom fabricated to mesh with existing trim and doors, while choice updates, including refreshed paint, upgraded lighting, and small refinements in the bathrooms, revitalized dated areas without the need for a full-scale interior renovation.
When a home grows upward, so does the potential. Thanks to the client’s vision, plus our seamless execution of the vertical combination, this Battery Park property gained immediate lifestyle benefits and long-term value. What was once a two story townhouse with built-in neighbors is now a seamless three-story home that includes two new bedrooms and a versatile office/gym - along with added contemporary visual appeal throughout. Beyond daily functionality, this rare three-level offering in Battery Park City enhances resale potential, blending practical living with thoughtful design.
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Further highlights from our Battery Park townhouse and apartment vertical combination at East 79th Street include:
Considering a townhouse or vertical apartment combination in NYC? Explore our portfolio of townhouse renovations and apartment combinations, learn more about Gallery, or contact us today. We’re a New York Times-featured design-build firm in New York City with a full-service approach to residential renovations, from architecture services and interior design and to material selection/procurement and construction management.
Whether you’re expanding up, down, or sideways, our integrated all-inclusive process delivers creative solutions, structural expertise, and timeless design that makes every square foot count.
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For a full apartment of about 1,700 square feet, construction typically runs five to six months. Design, board approval, and permitting come first and usually take four to six months, so most full renovations move from first consultation to move-in in 10 to 12 months. Scope, building rules, and how much infrastructure is being replaced set where a project falls in that range.
Read More: How Long To Renovate An Apartment In NYC?
The construction portion of a full kitchen renovation typically takes 7 to 11 weeks. Door to door, the timeline depends mostly on the building: about 10 to 14 weeks in a private townhouse, 14 to 20 weeks in a condo, 16 to 24 weeks in a post-war co-op, and 20 to 30 weeks in a pre-war co-op, where board and engineering review take longer. Gallery KBNY orders custom cabinetry, stone, and long-lead appliances during design and approvals, so materials arrive ready for the build.
Read More: How Long Does a Kitchen Renovation in NYC Take? A 2026 Timeline Breakdown
The construction portion of a bathroom renovation typically takes three to four weeks. Gallery KBNY renovates bathrooms as part of larger interior renovations, so bathroom work is sequenced alongside the rest of the apartment within the overall project schedule.
Learn More: Our NYC Bathroom Renovations
Board review and execution of the alteration agreement typically take 6 to 10 weeks in a post-war co-op and 8 to 14 weeks in a pre-war co-op, where asbestos filings, electrical load letters, and engineering review add steps. DOB permits usually run at the same time. A complete package with full technical drawings and specifications tends to clear the building's reviewing architect in one or two rounds, which keeps the approval phase on schedule.
Get Into The Specifics: In-Depth Co-Op Board Approval Process For Complex NYC Renovations: What to Expect
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