Typical cost in Irving
Irving Spiral Staircases installs spiral stairs to lofts, game rooms and finished attics in Irving homes, where a straight stair would take a room’s worth of floor. A spiral climbs in a square not much bigger than its diameter, in steel, wood or both, and we size it to the opening, the floor height and the people who will use it every day.
A spiral can give a game room a second way up or reach a room that never had a proper stair, in a house, a townhome or a loft condo. Our service area also includes Coppell and Southlake.
An upstairs game room or open loft may already be reachable from the main stair; a spiral adds a second way up from the family room or kitchen. Where the loft overlooks the room below, its edge needs a guard at least 36 inches high, and the stair’s top landing ties into that guard so there is no gap where they meet.
Turning attic space into a bedroom, office or playroom is an alteration that needs an Irving building permit, and the stair is part of what the plan shows. A spiral can land in a tight space between rafters, but the opening has to leave 6 feet 6 inches of headroom over every tread, which can mean moving the opening to the high part of the roof or framing a dormer.
A reading loft above a study or a mezzanine in a tall living room calls for a stair that looks like furniture. Oak treads on a black steel column, an all-wood spiral or forged-iron balusters can match the shelving and floors below, and the stair can turn either way so you step off facing into the room.
Townhomes and loft condos in Las Colinas and elsewhere in Irving add two steps. The owners association or condo board may need to approve the work, and every part has to fit through the entry, stairwell or elevator. Kits that bolt together from separate treads move into tight buildings more easily than a one-piece stair.
Under the 2024 IRC as Irving adopted it, section R318.7.11.1 sets the floor for a spiral stair: 26 inches of clear width at and below the handrail, treads at least 6 3/4 inches deep on a walkline no more than 24 1/2 inches from the center, identical treads, a rise of no more than 9 1/2 inches and at least 6 feet 6 inches of headroom.
The 26 inches is clear width, so the overall diameter is larger once the center column and handrail are added; compare a kit’s stated clear width, not only its diameter. Floor-to-floor height sets the tread count: a 10-foot height is 120 inches, and 120 divided by the 9 1/2-inch maximum rise is 12.6, so the stair needs at least 13 rises. The opening has to clear the diameter and leave headroom where you walk under its edge.
A spiral is a trade-off. It saves floor, and the code does not limit the open gap between spiral treads the way it does on regular stairs, so the stair looks light. In return you climb on the wide outer part of each wedge, carry loads with one hand on the rail, and move beds and dressers up another way. Small children and some pets need time to learn it, and a gate at the top can help. If the room will be a main bedroom or used by someone with limited mobility, a curved or straight stair is the better plan.
Have a kit already? See spiral staircase kit installation. For a stair to an outside deck or roof terrace, see outdoor spiral staircases. Other services are on the Irving Spiral Staircases home page.
Tell us the floor-to-floor height, the size of the opening or the space you have, and what the loft or attic is used for. Mention any HOA or condo approval you expect to need. We'll get back to you soon with an estimate or any questions we have. Estimates are free and there's no obligation.
Call (469) 351-6754