Spiral stairs have one of the widest price ranges of any staircase, because the same small footprint can hold a basic steel kit or a fully custom, stained-wood centerpiece. This guide breaks down spiral staircase cost by project type, size and material, explains what moves the price, and shows how a custom spiral is priced for homes in Wake County & Triangle Area, NC.
Jump to: cost by type, cost by size, cost by material, price factors, outdoor spiral stairs, kit vs custom and the FAQ. Ready to price your own? See our custom spiral stairs.
How much does a spiral staircase cost by project type?
The biggest price split is between a kit you install yourself and a spiral designed, built and installed for your space. Kits cost the least up front; custom spirals cost more but are sized, finished and installed to fit your home.
| Project type | What you get | Typical cost |
|---|---|---|
| Spiral kit, materials only | Standard-size steel or iron kit you assemble yourself | $1,000 to $5,000 |
| Kit with professional installation | Steel or iron kit installed by a pro | $1,300 to $6,000 |
| Mid-range metal or wood spiral | Upgraded materials and finishes, installed | $4,000 to $10,000 |
| Custom-built spiral | Designed and built to your height, opening and style | $10,000 to $20,000+ |
How does size change the cost of a spiral staircase?
Diameter and height matter most: a compact 4-foot spiral for a loft costs roughly half as much as a roomy 6-foot spiral for a main living area. Each step beyond a standard ceiling height adds about $150 to $300.
| Diameter x height | Typical use | Typical cost |
|---|---|---|
| 4 ft x 9 ft | Lofts and tight spaces | $3,000 to $6,000 |
| 5 ft x 10 ft | Common residential size | $5,000 to $10,000 |
| 6 ft x 12 ft | Main living areas, easier to climb | $8,000 to $15,000 |
| Custom or oversized | Unique dimensions or several levels | $12,000 to $20,000+ |
Wider spirals cost more but are easier to climb and to carry things up. Code-compliant spirals often need a larger diameter than compact kits.
What does a spiral staircase cost by material?
Steel and wrought iron are the most affordable spiral materials at about $1,300 to $6,000 installed, while wood, aluminum and glass spirals run from about $2,500 to $20,000 or more.
| Material | Best for | Typical installed cost |
|---|---|---|
| Steel | Modern and industrial interiors | $1,300 to $6,000 |
| Wrought iron | Traditional interiors | $1,300 to $6,000 |
| Wood | Warm, custom looks matched to floors | $2,500 to $18,000 |
| Aluminum | Outdoor spirals and decks | $2,500 to $20,000 |
| Glass (with metal or wood) | High-end contemporary designs | $5,500 to $20,000+ |
| Composite | Low-maintenance outdoor stairs | $4,000 to $8,000 |
A steel frame with wood treads is a common middle ground: it brings the warmth of wood at a lower cost than an all-wood spiral.
Common add-ons and extra costs
| Item | Typical cost |
|---|---|
| Each step beyond a standard height | $150 to $300 |
| Upgraded treads, handrails or balusters | $500 to $2,500 |
| Removing an existing staircase | $500 to $2,000 |
| Framing or enlarging the floor opening | Varies with structure |
| Permits | Varies by jurisdiction |
What drives the price of a custom spiral staircase?
Seven things set the price of a custom spiral: size, materials, configuration, railing, finish, site work and whether it goes inside or outside. That is why custom builders like JF Stairs price each spiral as a complete project instead of quoting labor by the hour.
- Size
- Diameter and floor-to-floor height set how many treads and how much material the stair needs.
- Materials
- Steel, iron, aluminum or wood, and for wood treads the species: oak, white oak, maple, walnut or hickory.
- Configuration
- How far the stair turns, the direction of travel, the landing platform size and where you step on and off. A spiral that turns less than a full circle can need fewer treads.
- Railing and balusters
- Wood, iron, rod, cable or glass change both the look and the cost.
- Finish
- Stain matched to your floors, paint, two-tone or a weather-ready coating.
- Site work
- Framing or enlarging the floor opening, removing an old stair, and patching and finishing around it.
- Interior or exterior
- Outdoor spirals need weather-resistant materials and a solid connection to a deck, footing or pad.
How much does an outdoor spiral staircase cost?
Outdoor spiral stairs usually cost more than comparable indoor models because they need weather-resistant materials such as aluminum, galvanized steel or powder-coated finishes. Aluminum spirals alone range from about $2,500 to $20,000 installed.
In Wake County and the Triangle, humid summers, heavy rain and occasional winter ice are hard on outdoor stairs, so the finish and the connection to your deck matter as much as the stair itself. A spiral also reaches a raised deck in a fraction of the yard space a straight stair needs. See how we build exterior spiral stairs.
Is a spiral staircase kit cheaper than a custom spiral?
Yes, up front: a kit can cost several thousand dollars less. The gap narrows once you add installation, code checks, finish upgrades and fixes for a kit that does not quite match your height or opening.
| Spiral staircase kit | Custom spiral by JF Stairs | |
|---|---|---|
| Upfront cost | Lower | Higher, one fixed written price |
| Fit | Standard sizes, adjusted on site | Built to your exact height, diameter and opening |
| Finish | Limited catalog options | Your wood species, stain match and railing style |
| Code | Code and non-code kits are both sold; checking is up to you | Planned around the requirements for your home |
| Installation | Your time, or an installer you hire separately | Installed by the crew that designed and built it |
A kit can make sense for a low-traffic utility space. For a stair your family will use every day, or one that should look like it belongs in your home, a custom spiral is usually the better investment. We design, build and install for you, not a kit.
Does building code affect spiral staircase cost?
Yes. Code-compliant spirals typically need a larger diameter and more generous treads than compact non-code kits, which adds material and cost. Under the International Residential Code (IRC), which North Carolina’s Residential Code is based on, a spiral needs at least 26 inches of clear width, 6 3/4-inch treads at the walkline, risers no taller than 9 1/2 inches and 6 feet 6 inches of headroom.
Your local building department confirms which requirements apply. See the full spiral stair code requirements.
Is a spiral staircase cheaper than a regular staircase?
Not always. National guides put a standard main interior staircase at about $2,000 to $5,000, so a custom spiral can cost more in dollars. What a spiral saves is space: it fits in roughly a 4- to 6-foot square, where a straight stair needs a much longer run.
Spirals also have trade-offs: one person at a time, harder furniture moves, and a steeper climb for small children, older adults and pets. A larger diameter and a solid handrail reduce most of them. If a spiral is not the right fit, or you want to swap an existing spiral for a conventional stair, see new staircase installation.
How does JF Stairs price a spiral staircase in Wake County & Triangle Area, NC?
We price every spiral as one project with a fixed written price, never by the hour. Your price comes from your free 3D design, based on size, materials, configuration, railing, finish and site work.
Every JF Stairs project runs through founder Jorge Felipe da Silva, who leads the design and the team of stair specialists that builds and installs it. You talk to the owner, not a call center.
- Share photos and a few measurements. We review your space and how you will use the stair.
- See your spiral in 3D. Choose materials, railing and finish before anything is built.
- Get one fixed written price. The whole project, in writing, before work starts.
- Our own crew builds and installs it. Installation takes days, not weeks, and we clean up every day.
The Modern: $$
The Serene Spiral: $$$
The Horizon Spiral: $$$$See all three styles on our custom spiral stairs page. We design, build and install spiral stairs across Wake County & Triangle Area, NC, including Raleigh, Durham, Cary, Apex, Wake Forest, Holly Springs, Morrisville, Garner, Chapel Hill, Clayton, Fuquay-Varina, Knightdale, Wendell, Zebulon and Rolesville.
What do you need for an accurate spiral staircase quote?
A few measurements and photos get you most of the way to an accurate price:
- Floor-to-floor height, from finished floor to finished floor.
- The size of the floor opening, or where you would like one.
- Headroom above the path of the stair.
- Whether it is interior or exterior, and what it connects to: loft, bonus room, deck or upper-level entry.
- Photos of the space from the bottom and the top.
- Your material, railing and finish preferences, if you have them.
Send them with your request and we will turn them into a 3D design and a fixed written price.
How we put these numbers together
The ranges in this guide come from national home cost guides (HomeAdvisor, Angi and HomeGuide) reviewed in September 2026, and the code minimums from the International Residential Code. They are market ranges, not JF Stairs prices, and we review them every year.
Spiral staircase cost questions
What is the average cost of a spiral staircase?
About $10,400 on national averages, with most homeowners paying $3,000 to $15,000 installed. Kits start near $1,000 for materials only, and high-end custom or exterior spirals can reach $20,000 to $25,000 or more.
How much does a spiral staircase cost per step?
Pricing usually covers a standard height of about 8.5 to 9 feet, and each additional step adds roughly $150 to $300 depending on materials. Custom spirals are priced as a whole project rather than step by step.
How much does it cost to install a spiral staircase kit?
A steel or iron spiral kit costs about $1,000 to $5,000 for materials and about $1,300 to $6,000 with professional installation. Upgraded treads, railings or changes to the floor opening add to that. For a stair that fits your space exactly, compare it with a custom spiral quote.
How much does an outdoor spiral staircase cost?
Outdoor spirals usually cost more than similar indoor ones because they need weather-resistant materials and finishes, and aluminum spirals run about $2,500 to $20,000 installed. JF Stairs designs, builds and installs exterior spiral stairs for decks and upper-level entries in Wake County & Triangle Area, NC.
How much does a wrought iron spiral staircase cost?
A wrought iron spiral staircase costs about $1,300 to $6,000 installed on national averages, similar to steel. Decorative ironwork, wood treads, larger diameters and extra height push it higher. For a custom metal spiral, JF Stairs prices the full project from your free 3D design.
Are spiral staircases up to code?
Yes, spiral staircases are generally permitted in homes when they meet minimum dimensions: under the IRC, which North Carolina’s Residential Code is based on, that means at least 26 inches of clear width, 6 3/4-inch treads at the walkline, risers no taller than 9 1/2 inches and 6 feet 6 inches of headroom. Your local building department confirms the requirements for your project.
Is a spiral staircase cheaper than a regular staircase?
Not necessarily. A standard main interior staircase costs about $2,000 to $5,000 on national averages, while most installed spirals run $3,000 to $15,000. The advantage of a spiral is its small footprint, not a lower price.
How much does it cost to replace a spiral staircase with a regular staircase?
It depends mostly on space and structure. A conventional stair needs a longer run and usually a larger floor opening, so the project often includes removing the spiral, reframing the opening and finishing work. We price it as one project after a free design consultation.
Does JF Stairs charge by the hour for spiral stairs?
No. We price each spiral staircase as a complete project with one fixed written price, based on your free 3D design.
How long does it take to install a spiral staircase?
Once your stair is built, installation takes days, not weeks. The full timeline depends on your design, materials and site work.
Get a free spiral staircase design and quote
Skip the guesswork. Send us a photo of your space and a few measurements, and we will design your spiral in 3D and give you one fixed written price.
About the author
Jorge Felipe da Silva, Owner & Founder, JF Stairs
Jorge Felipe da Silva is the owner and founder of JF Stairs, a locally owned and operated stair contractor in Wake County, NC. For more than 12 years he has led staircase design, build and installation projects across the Triangle, for new construction and remodels alike. Every JF Stairs project runs through Jorge: he guides the design with the homeowner and leads the team of stair specialists who build and install it.
JF Stairs is SMA-certified, licensed and insured, and rated A+ by the BBB.
