Curved stair lifts are significantly more expensive than straight models due to the need for custom rail fabrication and complex engineering. While a straight stair lift typically costs between $2,000 and $5,000 including basic installation, a curved stair lift generally ranges from $10,000 to $15,000 or more.

The price difference is driven by several factors:

• Base Unit: Straight units cost $2,000 to $5,000, while curved units jump to $10,000 to $15,000.
• Installation: Professional fitting for straight models ranges from $500 to $1,500, whereas curved installations are more labor-intensive, costing between $1,500 and $3,000.
• Rail Customization: Rails for straight models start around $1,000, but custom-bent rails for stairs with turns can exceed $10,000.

Overall, the total average investment for a curved lift (including installation) is estimated at $12,000 to $18,000, which is approximately three to four times the cost of a straight lift setup ($3,500 to $7,000).