Indoor Spiral Staircases
A Staircase That Earns Its Place in the Room.
We design and builds custom indoor spiral staircases that do exactly what a well-made object should: function without compromise and look like they were always meant to be there.
100%
Satisfied Customers
95%
Years in Business
50
States Served
GET A FREE QUOTE.
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Your information is never sold or shared.
Pay over time with AffirmAs low as 0% APR — Subject to credit check
%
Satisfied Customers
%
Years in Business
States Served
Our INDOOR Collections
Designed with Character in Mind
Our indoor spiral staircase kits come in metal, oak, and specialty configurations – each one built to order and customizable across diameter, height, direction, tread material, and finish. Whether you’re replacing an existing stair, finishing a loft, or designing a space from scratch, we’ll configure a kit that fits your opening and your aesthetic.
Functional
Metal Series
- ✓Steel or Aluminum
- ✓Diamond plate or smooth treads
- ✓Custom colors available
- ✓Stair Diameters starting at 3’-6”
- ✓Code Compliant Stair Diameters starting at 5’-0”
- ✓Configurable with a range of unique accessories and styles
Elegant
Modern
- ✓Steel or Aluminum
- ✓Stainless Steel or Bronze Multi-Line hardware
- ✓Diamond plate, smooth or wood treads
- ✓Custom colors available
- ✓Stair Diameters starting at 3’-6”
- ✓Code Compliant Stair Diameters starting at 5’-0”
- ✓Configurable with a range of unique accessories and styles
Refined
Wood Enhanced
- ✓Steel or Aluminum
- ✓A variety of wood species available
- ✓Custom colors available
- ✓Stair Diameters starting at 3’-6”
- ✓Code Compliant Stair Diameters starting at 5’-0”
- ✓Configurable with a range of unique accessories and styles
Cozy
Oak
- ✓Hand-selected by a Master Carpenter for quality
- ✓Made from Northern and Appalachian Red Oak
- ✓Designed for ease of assembly
- ✓Customizable with handrails, spindles, and more
Distinct
Victorian
- ✓Ornamental scrolling and cutwork embellishments
- ✓Cast from low maintenance aluminum
- ✓Weighs one-third less than cast iron
- ✓Wide range of customizable finish options
Timeless
American Industrial
- ✓Honors the history of American craftsmanship
- ✓Reminiscent of masonry construction techniques
- ✓Crafted from lightweight aluminum
- ✓Industrial aesthetics with modern functionality
★★★★
4.4
Customer Rating
Since 1931
95+ Years Engineering Indoor Staircases
The Iron Shop has been designing, fabricating, and finishing spiral staircases from a single facility in Broomall, Pennsylvania since 1931. Four generations of the Cohen family have run this operation – and every step of the process, from design and engineering to machining, welding, finishing, and shipping, still happens under one roof.
95+ Years in Business
100,000+ Staircases Installed
125 Expert Craftspeople
1 Facility. Every Step.
How It Works
FROM QUOTE TO INSTALLATION
01
Free Consultation
Speak with a staircase expert who can walk you through measurements, materials, and code requirements – no pressure, just answers.
02
Custom Design
We configure your stair to your exact specs: diameter, height, direction of rotation, tread material, and finish.
03
Precision Manufacturing
Your staircase is fabricated in our Broomall, PA facility by our team of 125 craftspeople and shipped directly to you.
04
Simple Installation
Every kit includes all components and hardware. Most two-person crews can complete installation in a single day with basic hand tools.
Perfect For
ANY INDOOR APPLICATION
Loft Access
Connect upper levels without committing to a full staircase footprint
Open Floor Plans
Add vertical access without walling off your space
Renovations
Replace an existing stair or open a new level entirely
New Construction
Specify early, install during rough-in or finish phase
Library & Mezzanine
Elegant access to elevated shelving or working mezzanines
Multi-Family Friendly
Code-compliant configurations for duplex and multi-unit builds
Get Inspired
INSTALLATION GALLERY
IMG_5856
Oak, 4-0 diameter interior stair
201496-Koranek test pictures
Steel, 5-0 code diameter interior spiral, black matte finish, with oak tread coverings and handrail
Multiline
Steel, 5-0 code diameter interior spiral, oil rubbed bronze finish, with oak coverings and multiline rails
American_Industrial_07
American Industrial, 4-0 diameter interior spiral, verdi gris antique finish
Vic verdi
Victorian cast aluminum, 5-0 code diameter interior spiral, verdi gris antique finish with scroll ends on railing
IMG_2073
American Industrial, 5-0 code diameter interior spiral, black gloss finish, with brass handrail
Hear first hand
WHAT OUR CUSTOMERS SAY
Common Questions
INDOOR STAIRCASE FAQ
Have more questions?
Call a spiral stair expert at 1-800-523-7427.
Mon–Fri 8am–8pm | Sat 8am–12pm EST.
What's the difference between Code and Non-Code stairs?
Code-compliant stairs meet IBC and IRC requirements for primary-use staircases – including spindle spacing of less than 4 inches between verticals and specific tread dimensions. Non-Code stairs are typically used for secondary access (lofts, attics, storage areas) where building code does not apply. Your design consultant can help determine which is right for your project and local requirements.
What measurements do I need before I order?
Two critical measurements: your finished floor-to-floor height, and your well opening size. The finished well opening must be at least 2″ larger than the stair diameter overall. If you haven’t cut your opening yet, your consultant can walk you through how to factor in subflooring and finished floor thickness.
How long does installation take?
Most two-person crews can install a standard metal kit in about one full day. Oak and Code metal kits typically take two days. You’ll need a ladder, drill, level, and basic hand tools – no specialty equipment required.
Can I get wood treads on a metal staircase?
Yes! The Iron Shop offers tread covers in 7 wood species for interior stairs: American Cherry, Hickory, Mahogany, Maple, Red Oak, Walnut, and White Oak. Wood tread covers are installed over the metal tread base and are one of the most popular ways to customize the look of a metal spiral stair for interior use.
GET A FREE QUOTE.
Share a few details about your project and one of our staircase experts will follow up – usually within one business day. We’ll help you nail down the measurements, work through your options, and make sure the stair you order is the right one for the space.
- ✓Free consultation with a staircase expert.
- ✓No pressure. No obligation.
- ✓Ships directly from our Broomall, PA facility.
- ✓95+ years of engineering behind every kit.
We respect your privacy. Your information is never sold or shared.
Pay over time with AffirmAs low as 0% APR — Subject to credit check