Underfloor heating is a luxurious bathroom upgrade that your feet will be thanking you for. The cost to install underfloor heating depends on the size of the bathroom, type of heating system, and complexity of the installation. There are two types of underfloor heating: electric and hydronic (water-based). Electric is approximately $5–$12 per square foot, while hydronic is slightly more expensive at $7–$20 per square foot. Additional costs include thermostats and controls, insulation, and additional materials. Labor rates can vary, but expect to spend $50–$150 per hour for installation, or some contractors charge a flat fee. Overall, homeowners should expect to spend $2,000–$5,000+ installing underfloor heating.