Depending on the size of your home, it can cost anywhere from $2,000 - $8,000 to have a central AC unit installed. Generally speaking, the bigger the home, the more expensive it will be to install a central AC unit. Some other factors that can affect the overall cost of having a central AC unit installed include: whether or not there is already an existing AC unit in place; whether or not the home is equipped with ductwork; and whether or not there are any existing structural problems with the home that need to be addressed before installing a new AC unit.

The cost to install a central AC unit will vary depending on the size of your home, the type of unit you choose, and the contractor you choose. However, on average, you can expect to pay around $3,000 for installation. That said, it's important to get multiple quotes from contractors in order to get the best price. Be sure to ask for references and check them out, and also make sure the contractor is licensed and insured.