Understanding the 27-Step Rule for Spiral Staircases

Spiral staircases are more than just space-saving solutions — they’re architectural statements that bring elegance and efficiency into your home. But if you’re planning to install one, you’ve probably come across something called “the 27-step rule.” So, what is it, and why does it matter?

🌀 Why Choose a Spiral Staircase?

Spiral staircases are ideal for:

• Small spaces: They take up less floor area than traditional stairs.
• Loft conversions: Perfect for accessing attics, mezzanines, or rooftop terraces.
• Modern aesthetics: With clean lines and curved beauty, spiral stairs add a stylish focal point to any home.
• Outdoor use: Many homeowners opt for spiral stairs on decks or balconies.

At Ideal Stairs, we customize spiral staircases to match your home’s layout, materials, and style. For other inspiration, check out our staircase design renovation tips or visit our blog library.

📏 What Is the “27-Step Rule”?

The 27-step rule is a general design guideline in staircase planning. It states that the total number of risers (steps) in a staircase should not exceed 27 in a single flight — especially in traditional stairs.

Why does this matter?

• Safety: Climbing more than 27 steps without a landing can cause fatigue or increase fall risk.
• Building code: Most building regulations (including in Canada) recommend or require landings for long stair flights.
• Comfort: Breaking up the stairs with a landing adds rest points and improves usability.

But here’s the twist — spiral staircases don’t always follow the same rules. Because of their compact and circular nature, they’re often exempt from the 27-step rule — as long as they meet safety standards like:

• Correct tread depth
• Uniform riser height
• Stable handrails

So while the 27-step rule is essential for traditional straight or L-shaped stairs, spiral stairs are often designed with different spacing and vertical rise allowances.

Thinking of Adding a Spiral Staircase?

Let’s talk. Whether it’s an indoor centerpiece or an outdoor solution, our team at Ideal Stairs is ready to design and build your custom spiral staircase — safely and beautifully.

📞 Contact us today for a consultation and take advantage of our current spring promotion.

Explore more at Houzz: Spiral Staircase Designs