The average cost to install a straight staircase is $1,900 to $5,000.
The average cost of a U-shaped staircase installation is $2,500 to $6,000.
The average cost of a winder staircase is $2,000 to $5,500.
The average cost of spiral staircase installation is $2,500 to $15,500.
The average cost of an L-shaped staircase installation is $2,200 to $5,700.
The average cost of a curved staircase installation is $9,000 to $100,000.
The average cost of a floating staircase installation is $15,000 to $100,000.
The average cost of a circular staircase installation is $9,000 to $100,000.