Floating &
Cantilever
Stairs
Engineering-first floating stair design for NYC townhouses, lofts, co-ops, and commercial interiors. We handle DOB documentation, structural calculations, fabrication, and installation.
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Four Ways to Build a Floating Stair
The structural approach determines the visual result, the wall requirements, and the overall cost. Each system has different load paths, installation constraints, and aesthetic trade-offs.
One central hollow steel beam runs under each tread. Slim profile, symmetrical look — the most popular choice in NYC homes. Compatible with wood, glass, or metal treads.
Two parallel beams — one on each side of the tread — for wider staircases. Provides greater lateral stability and handles higher live loads.
Treads anchor directly into a structural wall with no visible beam. The most dramatic option — support is entirely hidden. Suspended variants hang from ceiling rods.
Spiral stairs wrap a central column with cantilevered open-riser treads. Curved designs use CNC-bent steel stringers for non-linear geometry. Both are space-efficient.
Our Full Suite of NYC Floating Stair Services
In 2026, the most requested NYC configurations combine mono-stringer steel structures with white oak or walnut treads and frameless glass balustrades. Industrial lofts lean toward all-steel with cable railing. Upper East Side townhouses tend toward blackened steel stringers with wide hardwood treads. We build all of it.
We design, fabricate, and install custom floating stair systems with clean structural lines, coordinated finishes, and NYC-specific engineering and DOB compliance.
Best for: New builds, townhouse renovations, and full interior remodels that need a signature staircase.
We prepare the engineering and permitting side of floating stair jobs in New York City — from support strategy and wall review to DOB-compliant drawing coordination.
Best for: Projects where NYC DOB documentation, load calculations, and faster approvals are required.
We build glass tread floating stair systems with coordinated engineering, code-conscious detailing, and contemporary railing options suited to New York City interiors.
Best for: Contemporary loft and co-op interiors that need maximum light flow and open sightlines.
Choose white oak, walnut, maple, and other premium wood options for floating stairs that feel architectural but still livable and warm.
Best for: Warm residential interiors where natural materials and finish quality matter.
We fabricate steel-forward floating stairs for SoHo lofts, Tribeca commercial interiors, and modern homes that need stronger exposed structure.
Best for: SoHo lofts and Tribeca commercial interiors that need strong exposed structure.
We engineer curved and custom-geometry floating stairs that preserve visual openness while handling complex layouts common in New York City townhouses and lofts.
Best for: Townhouses and custom homes that need non-linear geometry and a sculptural centerpiece.
We help New York property owners add floating stairs to existing spaces where access, footprint, and structure all need careful planning.
Best for: Existing NYC lofts, mezzanines, and properties converting upper floors into living space.
We design outdoor floating entryways with finish and material choices suited for New York's climate — including freeze-thaw cycles, salt air, and heavy seasonal use.
Best for: Outdoor entry projects exposed to freeze-thaw cycles, salt air, and year-round NYC weather.
Before a cantilevered stair goes in, we reinforce the wall assembly or support structure so the final build performs the way it should, including in older NYC construction.
Best for: Pre-war buildings and older NYC construction that need upgraded wall backing before install.
We add clean LED lighting packages that improve nighttime visibility and elevate the finished look of modern floating stairs in New York City homes and offices.
Best for: Clients who want safer nighttime navigation and cleaner architectural ambiance.
Pair your floating stair build with custom glass balustrades designed for safety, NYC code compliance, and uninterrupted sightlines.
Best for: Open-concept homes and lofts that want code-compliant fall protection without visual bulk.
We build commercial floating stairs that balance architectural impact with tougher NYC usage expectations, co-op board documentation, and project coordination needs.
Best for: NYC offices, showrooms, and co-ops needing board documentation and commercial-grade execution.
For deadline-sensitive jobs in New York, we create milestone-driven floating stair schedules with tighter coordination and real-time communication.
Best for: Projects with tight NYC move-in dates or GC milestones that cannot slip.
Keep your floating stairs performing and looking right with recurring inspections, finish checks, and hardware review across the NYC metro area.
Best for: Owners who want proactive safety checks and finish protection on an existing stair system.
Full-scope design, engineering, and installation for NYC properties.
Learn more →Structural documentation and DOB submission coordination.
Learn more →Contemporary glass tread builds for modern NYC interiors.
Learn more →What We Build With
The structural backbone of most modern floating stairs. The hollow cross-section reduces weight without compromising load-bearing strength — critical when treads cantilever from a single wall. Laser fabrication gives us precise tolerances, clean edges, and consistent dimensions across every component.
Glass railings preserve sightlines and allow light to pass between floors — a meaningful gain in narrow NYC brownstones. We use tempered or laminated safety glass panels as required by NYC building code. Frameless systems with standoff hardware or base shoe channels give the cleanest finish.
The most requested tread material for residential projects in New York. Wood adds warmth and texture that contrasts well against steel or glass. Species selection depends on hardness, tone, and maintenance tolerance. Engineered wood resists humidity shifts better than solid wood — relevant in NYC's variable climate.
Concrete treads are common in commercial and industrial settings where durability is the priority. Precast units are formed off-site and installed as finished pieces, reducing on-site labor. Hybrid designs optimize each component: steel for structure, concrete for durability, glass for visual openness. We size the wall mounting system to handle the additional weight.
Four Railing Systems — One Decision That Shapes Everything
Frameless tempered or laminated panels with standoff hardware or base shoe channel. Preserves sightlines and passes light between floors. Required glass thickness: 3/8"–1/2" residential, 1/2"–3/4" commercial.
316 stainless steel horizontal cables between steel posts. Post spacing ≤ 36". Must prevent 4" deflection per IRC. Reinforces the open, airy aesthetic of floating stairs at lower cost than glass.
Flat bar panels, laser-cut screens, or vertical picket systems fabricated in the same hollow steel as our stringers. Powder-coated, brushed, or raw finish. Custom geometric patterns available.
White oak, walnut, or maple top rails mounted on steel or aluminum posts. Round, oval, or flat-topped profiles. Requires periodic refinishing. Most often combined with glass or cable balusters.
The only NYC firm built entirely around floating stair engineering
Most contractors treat floating stairs as a side job. We don't. Every project we take is a floating stair project. That focus means deeper expertise, fewer surprises, and better outcomes for NYC clients dealing with DOB requirements, pre-war building conditions, and co-op board documentation.
One practical advantage most people don't anticipate: floating stairs with open risers change how light moves through a building. In narrow brownstones and townhouses, a staircase positioned near a rear window or skylight can distribute natural light across multiple floors. Glass treads take that further — light travels downward with almost no obstruction, which matters in dense NYC blocks where neighboring structures limit daylight on lower floors.
We've worked in Manhattan townhouses, Brooklyn brownstones, SoHo lofts, and Jersey City high-rises. The structural challenges vary. Our standard doesn't.
We prepare and coordinate permit-ready documentation that satisfies DOB structural requirements. No waiting on outside engineers or chasing paperwork.
Older NYC buildings have structural realities that modern specs ignore. We evaluate existing conditions first, then design to what's actually there.
We provide the engineering summaries and plan sets co-op boards and condo associations require before approving structural work.
NYC Building Code Requirements
A building permit is required for most floating stair installations in New York. The NYC Building Code — based on IBC standards — sets minimum dimensions for every component. Filing with the NYC Department of Buildings and scheduling required inspections typically adds 4 to 8 weeks to a project depending on the borough. We handle the entire permit workflow.
Co-op buildings add a layer of review: boards typically require engineering summaries and plan sets before approving structural work. We provide those documents as part of our standard scope.
What Floating Stairs Cost in New York
Most projects land between $7,000 and $30,000+ depending on configuration and materials. Open-riser wood tread stairs on a single stringer sit at the lower end. Cantilevered steel systems with glass railings and laser-fabricated components are at the top.
Custom-cut components — especially laser-fabricated steel stringers — cannot be adjusted on-site without significant cost. A site assessment before fabrication is the most important step in keeping a project on budget.
How We Deliver a NYC Floating Stair Project
Keeping Your Floating Stairs in Condition
Powder-Coat Steel
Wipe powder-coated steel components with a damp cloth and mild detergent. Avoid abrasive pads. Check for chips at anchor points annually — touch up before rust can start.
Fastener Check
Inspect visible fasteners and anchor hardware every 12 months. Light torque on exposed bolts is normal upkeep. Loose hardware should be addressed immediately — don't let it sit.
Hardwood Tread Refinishing
Wood treads in high-traffic NYC homes typically need refinishing every 5–10 years depending on finish type and foot traffic. Sand lightly and recoat — don't wait for visible wear-through.
Wall Anchor Inspection
Cantilevered stairs load the wall assembly at anchor points. Every few years, inspect for cracking, movement, or grout separation around anchors — especially in older NYC plaster walls.
Get a Free NYC Floating Stair Assessment
We visit your property at no cost and deliver a full structural and design recommendation within 48 hours. No pressure. Just honest engineering advice.