The answer to 'how much to replace thermostat in my area' is that the cost can vary widely depending on several factors. Typical ranges for a basic thermostat replacement can be anywhere from $100 to $300, but more advanced smart thermostats or complex installations may cost $400 or more.
The key factors that influence the cost include the type of thermostat (basic, programmable, smart), the complexity of the HVAC system, whether any electrical work is required, and the labor rates in your local area. It's best to get quotes from 2-3 local HVAC contractors to compare prices and find the right solution for your home.