Product SKU: EN36L09S0VP1
11 ft Spiral Staircase Kit – The Avery Interior Stair
$1,859.00
Ordered
May 5
Shipping dates estimated
Delivered
May 15 - 19
Made in
Pennsylvania
Industry’s Only
Lifetime Warranty
Best Price
Guarantee Direct
from Manufacturer
DIY Prefabrication
Stair Kit Installation
About This Stair
This 11 ft Spiral Staircase Kit is designed for high ceiling applications and expansive interior spaces, making it ideal for multi-level homes and large-scale layouts. It provides extended vertical reach while maintaining a clean, cohesive stair design, commonly offered in models like the Avery.
The configuration shown reflects a standard setup of this stair type. Customization options allow you to adjust diameter, finishes, and tread details to better suit larger spaces and more open environments.
Best For: High ceilings, multi-level interiors, and larger residential layouts.
Indoor or Outdoor Use: Indoor use.
Code Compliance: Suitable for standard residential applications; confirm local code requirements as needed.
Available Height Range: Designed for floor-to-floor heights around 11 feet.
Diameter / Tread Options: Multiple diameter and tread configurations available to accommodate larger spaces and design flexibility.
Installation Difficulty: Moderate to advanced; taller installations may require additional planning and coordination.
What’s Included: Complete stair kit with all structural components, railing system, and installation hardware.
Product Specs
Width
3ft 6in Diameter
Height
9’11”-11’1″ Adjustable Height
Treads
Smooth Steel Treads
Handrail
Vinyl Handrail
Railing
1 Platform Rail
Customer Submitted Videos
Customer Q&A
Do you offer stairs that meet building code?
Sara C.
Yes, we do! Our SMA Certified Stair Designers are experts in your local building codes. We build thousands of stairs to code every year and we can do that for your project if you desire. The need to meet building code is required in some situations and in other situations code compliance may not be necessary. Please reach out to us to discuss further.
Do you have stairs for outdoor use?
Courtney B.
We have exterior spiral stair options that will last a lifetime outdoors. We have galvanized steel, raw aluminum, and powder coated aluminum stair material options! All of our outdoor spiral stairs are backed by a lifetime warranty.
Where do you ship your stairs?
Chris M.
We ship our stairs directly to consumers all across North America from our facility in Collegeville, Pennsylvania. All of our stairs are custom built to your specs and then shipped directly to you broken down in kit form for easy step-by-step DIY installation.
How much floor space do your stairs take up?
Ethan G.
The floor space a stair takes up is determined by the stair’s diameter. The smallest size diameter we offer is 3 feet 6 inches (42″ X 42″ floor footprint). Our standard diameters increase in six inch increments, 42″ x 42″ to 48″ x 48″ to 54″ x 54″ and so forth. We recommend that you place painters tape on the ground in the above dimensions to determine how the stair will look in your space.
Read Reviews From Our Customers
10 Reviews
Addy B.
Feb 19, 2026
We wanted a way to reach the loft of our cabin rental without taking up too much space. The cabin is already on the smaller side and a traditional staircase would’ve been way too big. Paragon’s price point and aesthetic were exactly what we were looking for.
Jeremy R.
Feb 28, 2026
I had an overall excellent experience with paragon. I bought a spiral staircase and installed it myself. Vincent helped me specify the correct stair case and railing. The packaging and parts labeling was awesome. Overall quality was top notch.
Krista S.
Feb 17, 2026
Paragon checked all of the boxes for us – easy ordering, great price, and a safe product! Installation was easy and we couldn’t ask for a better fit in our 1920’s home.
Tom S.
Mar 3, 2026
We knew we wanted a spiral for our home, but didn’t know where to start. We looked online and found Paragon Stairs. We got an amazing product and great service from our designer and the Paragon Team.
Jay C.
Feb 6, 2026
I had an amazing experience with Paragon. Not only was the sales rep extremely understanding of my complex situation but also worked to make sure that I was able to get a product that worked for my space and actually recommended a slightly less expensive option after going through all of the challenges.
Most Trusted Staircase Provider
We’re proud to have been entrusted by some of the nation’s most reputable brands and have been featured in top publications and productions. Here are some of the places our quality stairs can be found:
Discover the Perfect Custom Staircase with Our Complimentary Consultation
At Paragon, our free consultation for custom staircase design offers personalized insights, expert guidance, and a collaborative approach to ensure your vision transforms into a stunning, tailor-made staircase that perfectly complements your space and style.
- Design and sizing advice
- 3D model of your staircase in your space
- Design options that perfectly fit your budget
- Estimated product lead times
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