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Install a Spiral Staircase

Create convenient access between an upstairs room and a downstairs room by installing a spiral staircase. Use these step-by-step instructions to install one today.

More in Remodeling

installing a spiral staircase
  • Time


  • Price Range

    $1,000 - $2,500

  • Difficulty



Step 1: Secure the Base and Center Pole

Determine and mark on the floor the center of the opening, then position the base. Secure it in place with screws (Image 1).

Screw the center pole into the base plate positioned on the floor below (Image 2). Follow up by inserting the base plate cover onto the pole.

Step 2: Add Spacers, Spacer Cans and Treads

Now it's time to insert the spacers, the spacer cans and the treads (Image 1). When adding the treads, it's important to alternate placing one to the right and one to the left, distributing the weight in a balanced way.

Repeat this process until you reach the top (Image 2). Keep in mind you can add additional spacers if desired to give more rise between the stairs.

Step 3: Add the Landing

When you have reached the top, screw the support for the newel post into place (Image 1) and add an additional spacer and spacer can before setting the landing into place (Image 2).

Using a cordless drill, start the pilot holes for the brackets that secure the landing into place (Image 3).

Step 4: Secure the Treads

Once the landing is in place, it's time to line up the treads and prepare for the baluster install.

As a rule when lining up treads for a spiral staircase, the rear of each tread should overlap in the front of the tread immediately above it by 1" to 3" (Image 1).

Using the vertical rods to secure the treads into place, start at the bottom and work your way up as you prepare to install the handrail (Image 2).

Step 5: Add the Handrail and Newel Post

Once part of the handrail is in place, screw in the threaded couplers that help lock it in place, adding glue for extra security; continue this process until the handrail reaches the bottom of the stairs (Image 1).

Finally attach the newel post (Image 2) and the installation is complete.