We have outlined several factors to consider when determining the cost of custom floating stairs including shape, size, constructions, materials, style, accessories, engineering, and shipping. You can expect to spend $15,000 – $100,000 for a complete floating stair which includes stringers, treads, and railings. Generally, many of our customers are spending on average $20,000 – $30,000 per flight with railings however, your imagination is the only limitation and pricing can fluctuate dramatically.