The average cost to build an indoor swimming pool in the United States ranges from $80,000 to $200,000, with high-end custom designs exceeding $300,000. Key factors influencing these costs include material selection, enclosure type, heating systems, and regional labor rates. For example, concrete pools cost $40–$100 per square foot, vinyl-liner pools $25–$50 per square foot, and fiberglass pools $60–$100 per square foot. Glass or polycarbonate enclosures add $50,000–$150,000, while heating systems require $10,000–$30,000 annually. Permits, site preparation, and long-term maintenance also contribute significantly to total expenses.

The cost variance stems from material durability and installation complexity. Concrete pools, though expensive upfront, offer longevity and customization, while vinyl-liner pools are cost-effective for smaller budgets but require frequent replacement. Fiberglass pools balance initial and maintenance costs but limit design flexibility. Enclosure expenses depend on transparency (glass) versus cost-efficiency (polycarbonate). Heating is a major ongoing cost due to indoor insulation challenges; solar systems reduce annual expenses by 20–30%. Regional labor rates also play a role, with costs 15–25% higher in coastal states like California or Florida compared to Midwest or Southwestern regions. According to the National Swimming Pool Industry Association, 60% of indoor pool owners spend over $100,000, with 20% exceeding $200,000. Additionally, energy-efficient upgrades (e.g., variable-speed pumps, heat pumps) add 10–15% to initial costs but lower lifetime expenses by 30–50%. Local regulations, such as Americans with Disabilities Act compliance and structural load requirements, further increase costs by 5–10%. Data from the U.S. Census Bureau shows that indoor pools are 3x more common in high-income households (households earning over $150,000 annually), reflecting their premium pricing. Ultimately, total costs depend on balancing upfront investments with long-term energy and maintenance savings.