The answer to 'how much to replace thermostat in my area' is that the cost to replace a thermostat can vary widely depending on several factors. In general, you can expect to pay anywhere from $50 to $300 or more to have a new thermostat installed by a professional HVAC technician. The exact price will depend on the type of thermostat, the complexity of the installation, and your local labor rates.
More basic, manual thermostats are typically on the lower end of that range, while smart, programmable, or Wi-Fi-enabled thermostats can be more expensive. The cost will also depend on whether any additional wiring or electrical work is required during the installation. It's best to get quotes from a few local HVAC companies to compare prices and find the best value for your home.