The answer to 'how much to replace switch in my area' is that the cost to replace a light switch can vary significantly depending on several factors. Typically, the cost for a basic switch replacement by a professional electrician can range from $50 to $200 or more, not including any additional electrical work that may be required.
The main factors that influence the cost include the type of switch (basic vs. smart/dimmer), the complexity of the electrical work, the labor rates in your local area, and whether any permits or inspections are needed. It's important to get quotes from licensed electricians in your local area, as their rates and the cost of materials can vary widely by location.