Indoor Spiral Staircases
INDOOR
SPIRAL
STAIRCASES
The Iron Shop has helped over 100,000 homeowners transform their living spaces with precision-crafted indoor spiral staircases. From compact lofts to grand two-story libraries — steel, aluminum, and solid oak options with 20+ finish colors.
WHY CHOOSE AN INDOOR SPIRAL STAIRCASE FROM THE IRON SHOP?
An indoor spiral staircase from The Iron Shop is more than a way to move between floors — it is a design statement. Our precision-engineered kits are built to last a lifetime, arrive pre-cut and pre-drilled, and install in a single weekend without professional labor.
SPACE-SAVING DESIGN
Diameters starting at 42" — ideal for lofts, attics, libraries, and basements where a straight staircase won't fit.
STYLE VERSATILITY
Choose from modern steel, ornate Victorian cast aluminum, or warm kiln-dried red oak — all with 20+ powder-coat finishes.
CODE COMPLIANT
Every indoor staircase meets or exceeds IBC and IRC residential building code requirements in all 50 states.
DIY WEEKEND INSTALL
Ships fully pre-cut and pre-drilled. Most homeowners complete installation in one weekend with a helper and basic tools.
OUR INDOOR STAIRCASE SERIES
Three distinct indoor series — each engineered for a different aesthetic and budget. All code-compliant, all DIY-installable.
Most PopularSTEEL SERIES
Our best-selling indoor spiral staircase. Powder-coated steel construction with grating or solid steel treads. Clean, modern lines that complement any interior.
- ›Diameters from 42" to 72"
- ›20+ powder-coat finish colors
- ›Steel grating or solid tread options
- ›Fits openings as small as 44"
OrnamentalVICTORIAN SERIES
Cast aluminum balusters with ornate scrollwork and decorative details. The Victorian series brings timeless elegance to traditional and transitional interiors.
- ›Cast aluminum ornamental balusters
- ›Brass or black finish options
- ›Decorative scroll center column
- ›Available in 5ft and 6ft diameters
Premium WoodRED OAK SERIES
Kiln-dried red oak treads paired with wrought iron balusters. The warmth of solid wood with the durability of steel — perfect for traditional and craftsman homes.
- ›Kiln-dried red oak treads
- ›Wrought iron baluster options
- ›Stainable to match existing floors
- ›Available in 5ft and 6ft diameters
COMPARE INDOOR STAIRCASE SERIES
Not sure which indoor series is right for your home? Compare key specs side by side.
| Feature | Steel Series ★ Most Popular | Victorian Series | Red Oak Series |
|---|---|---|---|
| Starting Diameter | 42 inches | 5'0" (60") | 5'0" (60") |
| Tread Material | Steel grating or solid | Steel grating | Kiln-dried red oak |
| Baluster Style | Standard steel | Cast aluminum ornamental | Wrought iron |
| Finish Options | 20+ powder coats | Brass or black | Stainable wood + 10+ metal finishes |
| DIY Installation | ✓ Weekend install | ✓ Weekend install | ✓ Weekend install |
| Building Code | ✓ All 50 states | ✓ All 50 states | ✓ All 50 states |
| Best For | Modern & contemporary | Traditional & Victorian | Craftsman & transitional |
| Lead Time | 3–4 weeks | 3–5 weeks | 4–6 weeks |
FROM QUOTE TO INSTALLED IN 4 STEPS
We have streamlined the entire indoor staircase experience — from your first call to a fully installed centerpiece in your home.
Request Your Free Quote
Fill out our quick form or call us. An indoor stair specialist will reach out within one business day to discuss your space, ceiling height, and floor opening.
Design & Configure
Select your diameter, tread material (steel, aluminum, or oak), railing style, and finish color. We provide a detailed rendering of your staircase before you commit.
We Build & Ship
Your indoor staircase is precision-manufactured and ships fully pre-cut and pre-drilled, typically within 3–5 weeks of order confirmation.
Install Over a Weekend
Follow our detailed video guides and step-by-step manuals. Most indoor installations are completed in one weekend with a helper and basic tools — no contractor required.
REAL INDOOR INSTALLATIONS BY OUR CUSTOMERS
Every staircase is custom-configured and installed by the homeowner. Here are a few recent indoor projects.
WHAT HOMEOWNERS ARE SAYING
"I installed the Steel Series staircase in my loft over a weekend. The instructions were crystal clear and the support team answered every question I had. It's the centerpiece of our home now."
"We chose the Victorian Series for our library and it is absolutely stunning. The ornamental cast aluminum balusters are gorgeous. Our guests can't stop talking about it. Worth every penny."
"The Red Oak Series matched our existing hardwood floors perfectly. I stained the treads myself before installation and the result looks completely custom. Couldn't be happier."
QUESTIONS ABOUT INDOOR SPIRAL STAIRCASES?
Our indoor stair specialists are available by phone to walk you through sizing, materials, and installation for your specific space.
Call an Indoor Stair Specialist
1-800-523-74271-888-816-0550Monday – Friday
8am to 8pm
Saturday
8am to 12pm EST
Our smallest indoor spiral staircase starts at 42 inches in diameter, requiring a floor opening of approximately 44 inches. This makes it ideal for tight spaces like lofts, attics, and basements where a conventional staircase simply won't fit.
Yes. All of our indoor spiral staircases meet or exceed IBC and IRC residential building code requirements. We provide full permit documentation with every order to support your local permit application.
Absolutely. Every kit ships pre-cut and pre-drilled with numbered components. Detailed step-by-step instructions and installation video guides are included. Most homeowners complete the installation in a single weekend with one helper and basic tools — no contractor required.
You need three measurements: the floor-to-floor height (total rise), the diameter of the staircase you want, and the size of the floor opening. Our specialists will walk you through the exact measurements over the phone or via our online configurator.
Indoor treads are available in steel grating, solid steel plate, kiln-dried red oak, and aluminum. Railing options include standard steel balusters, ornamental cast aluminum (Victorian series), cable rail, and glass panels. All metal components come in 20+ powder-coat colors.
Standard indoor spiral staircases typically ship within 3–5 weeks of order confirmation. The Red Oak Series may require 4–6 weeks. We provide tracking information and keep you updated throughout the production process.
GET A FREE QUOTE.
Tell us about your indoor staircase project and a specialist will contact you within one business day — no pressure, no obligation.
- ✓Free design consultation
- ✓Detailed rendering of your staircase included
- ✓Transparent pricing, no hidden fees
- ✓Permit documentation provided
- ✓Builder & contractor pricing available