The answer to 'how much to replace dimmer switch' is that the cost can vary widely, typically ranging from $50 to $300 or more, depending on several factors. The price will depend on the type of dimmer switch, the complexity of the installation, and whether any additional electrical work is required.
Factors that can influence the cost include the dimmer switch brand and features, the difficulty of the installation (such as if the wiring needs to be updated), and whether a professional electrician is hired to do the work. DIY installation may be possible for some homeowners, but calling in an electrician is recommended for safety and to ensure the job is done properly.