The answer to 'cost to install junction box' is that the cost can vary significantly depending on several factors. Generally, the installation of a junction box by a professional electrician can range from $100 to $500 or more, depending on the complexity of the job and your location.
The primary factors that influence the cost include the accessibility of the installation site, the need for any additional electrical work, the materials required, and the labor rates in your local area. Older homes may require more extensive work, which can increase the overall cost. Additionally, the size and type of junction box, as well as any necessary permits, can also affect the final price.