It is important to know the rate of AC installation in Port St. Lucie before heading for the installation work. In 2020, the average cost of installing an air conditioner in Port St. Lucie is in the range of $1810 to $9053. The installation cost is inclusive of average labor cost, which is needed for the installation, along with other tasks like surface preparation, cleanup fees, and average costs for machinery, equipment, and materials required for the installation. General contractor’s fees might be separately charged, which is in the range of $650-$815, and will be added to the final bill.