47-inch spiral staircases are a popular compact diameter, balancing modest footprint with usable tread depth. A 47" spiral stair requires a 49" x 49" minimum ceiling opening, making it a strong fit for lofts, garages, basements, and second-floor access in homes where space is limited but not extremely tight. At this diameter, a spiral stair is not IRC compliant for primary egress, so 47" kits are best used for secondary access, additions, and where local code permits.

We offer 47" spiral stair kits in three product lines: the Manhattan (indoor, all-painted steel construction), the Denver (indoor, solid beech wood treads with powder-coated steel), and the Naples Exterior (outdoor, hot-dip galvanized steel rated for all weather). Each is Italian-designed, ships ready for DIY installation, and offers adjustable rise and a universal landing. Browse the available 47" options below, or see our complete spiral staircase buyer's guide for help choosing between indoor steel, indoor wood, and outdoor configurations.