The answer to 'thermostat installation cost' is that the cost can vary widely depending on several factors. Typically, professional thermostat installation by an HVAC technician ranges from a basic service call fee up to several hundred dollars. The final cost will depend on the complexity of the installation, the type of thermostat, any necessary system modifications, and your location.
For example, a basic programmable thermostat replacement may cost $100-$300, while a smart thermostat with advanced features could be $200-$500 or more. The labor costs can also vary significantly based on your local HVAC service rates. Getting multiple quotes from reputable local HVAC companies is essential to understanding the typical costs in your area.