INDOOR
SPIRAL
STAIRCASES
Transform any loft, attic, library, or basement with a hand-crafted indoor spiral staircase. Unique visual appeal, space-saving design, and weekend installation — available in steel, Victorian, and red oak series.
INDOOR SPIRAL STAIRCASES
Indoor spiral staircases offer homeowners unique visual appeal and space savings and lend themselves to many different types of spaces and styles. From a minimalistic design to a traditional Victorian style, spiral staircases enhance and add interest to loft spaces, libraries, converted attics, basements, bonus spaces, and more.
The Iron Shop offers hand-crafted spiral staircases in a wide range of sizes and trim features to complement any style. Each staircase is precision-manufactured, pre-cut, and pre-drilled for a straightforward DIY installation that most homeowners complete in a single weekend.
SPACE SAVING
Diameters starting at 42" — ideal for tight openings where straight stairs won't fit.
STYLE VERSATILE
Modern, Victorian, or natural wood — a style to match every interior design.
CODE COMPLIANT
Meets or exceeds IBC and IRC building code requirements in all 50 states.
EASY INSTALL
Pre-cut, pre-drilled kit with video guides. Most installs complete in one weekend.
PERFECT FOR EVERY INDOOR SPACE
Whether you're accessing a loft, finishing a basement, or adding architectural interest to a library, there's an Iron Shop staircase designed for your space.
Loft Access
Open-plan lofts and mezzanines
Home Libraries
Reach upper shelving in style
Attic Conversion
Finished attic living spaces
Basement Stair
Replace tight basement stairs
Bonus Rooms
Above-garage bonus spaces
Commercial
Offices, retail, hospitality
CHOOSE YOUR SERIES
Three distinct indoor staircase series — each crafted to a different design aesthetic and budget. All include free shipping and a lifetime structural warranty.
Most PopularSteel Series
Our best-selling indoor spiral staircase. Precision-welded steel construction with a wide range of powder-coat finishes. Ideal for modern and transitional interiors.
- ›IBC/IRC code compliant
- ›Pre-cut, pre-drilled kit
- ›Adjustable rise height
- ›Optional oak tread upgrade
Best for Traditional HomesVictorian Series
Ornamental scrollwork and decorative cutwork embellishments bring timeless Victorian elegance to any home. Perfect for libraries, foyers, and historic renovations.
- ›Hand-forged ornamental details
- ›Kiln-dried red oak option
- ›Master Carpenter craftsmanship
- ›Heirloom-quality construction
Premium WoodRed Oak Series
Kiln-dried red oak treads hand-selected by a Master Carpenter. Warm, natural wood tones complement any interior design scheme from rustic farmhouse to contemporary.
- ›Hand-selected red oak
- ›Precision woodwork
- ›Stainable to match floors
- ›Lifetime structural warranty
CUSTOMIZE EVERY DETAIL
Every Iron Shop staircase is built to your specifications. Choose from dozens of options to create a staircase that is uniquely yours.
Diameter
- ›42"
- ›48"
- ›54"
- ›60"
- ›66"
- ›72"
Custom sizes available
Tread Material
- ›Steel Grating
- ›Steel Plate
- ›Kiln-Dried Red Oak
- ›Aluminum
- ›Composite
Mix & match available
Railing Style
- ›Standard Baluster
- ›Ornamental Iron
- ›Cable Rail
- ›Glass Panel
- ›Victorian Scroll
10+ options
Finish Color
- ›Gloss Black
- ›Satin Black
- ›Antique Bronze
- ›Hammered Silver
- ›Custom Match
20+ powder-coat colors
INDOOR STAIRCASES IN REAL HOMES
Every staircase shown was installed by a homeowner or contractor using an Iron Shop kit.
WHEN IT COMES TO INSTALLATION, WE'VE GOT YOUR BACK
Spiral Staircases from The Iron Shop are simple to install over a weekend with a helper and basic tools. We recognize that customers may only purchase one spiral staircase in their lifetime. That's why we pride ourselves on providing friendly customer service and helpful tools to assist with your installation.
We offer instructional videos and manuals that cover the complete process, from unboxing and layout to assembly and final installation.
Want to talk to a human? No problem. Give us a call. You may even get the owner of the company.
Request Quote
Fill out our form or call. An expert will reach out within one business day.
Design & Configure
Select diameter, treads, railing, and finish. We provide a detailed rendering.
We Build & Ship
Pre-cut, pre-drilled kit ships in 3–5 weeks with full tracking.
Weekend Install
Follow our video guides. Most homeowners finish in one weekend with a helper.
INDOOR STAIRCASE QUESTIONS?
Our spiral stair experts are available to answer any questions about sizing, materials, installation, or building codes.
1-800-523-74271-888-816-0550Monday – Friday
7am to 8pm EST
Saturday
8am to 12pm EST
Our smallest indoor spiral staircase starts at 42 inches in diameter, requiring a floor opening of approximately 44 inches square. This compact footprint makes spiral staircases ideal for lofts, attics, and basements where a conventional staircase would require too much floor space.
Yes. All of our indoor spiral staircases are designed to meet or exceed IBC and IRC residential building code requirements. We provide full documentation to support your local permit application. Our team can also advise on any state-specific requirements.
For indoor applications, we offer steel grating, steel plate, kiln-dried red oak, and aluminum treads. The red oak option is especially popular for homes where the staircase will be a focal point, as it can be stained to match existing flooring.
Standard ceiling height requirements vary by local code, but generally you will need a minimum of 6 feet 6 inches of headroom measured from the tread nosing to the ceiling above. Our team can help you calculate the exact rise and run for your specific ceiling height.
Absolutely. Our kits are specifically designed for DIY installation. Each order includes step-by-step printed instructions, access to our full library of installation videos, and direct phone support from our team. Most homeowners complete the installation in one weekend with a single helper and basic tools.
Our standard indoor spiral staircases are engineered to support a minimum of 300 lbs per tread, which exceeds residential building code requirements. Heavy-duty configurations are available for commercial applications or higher load requirements.
GET A FREE QUOTE FOR YOUR INDOOR STAIRCASE.
Tell us about your space and a spiral stair expert will contact you within one business day with a detailed quote — no pressure, no obligation.
- ✓Free design consultation with a spiral stair expert
- ✓Detailed 3D rendering included with every quote
- ✓Transparent pricing — no hidden fees or surprises
- ✓Permit documentation provided for your local authority
- ✓Contractor & builder pricing available for trade accounts