Gas oven installation can range from around $115 to $230, with an average cost of about $160, as of 2015. Prices depend on the location, as well as the complexity and length of installation.
If the appliance is a new addition, rather than a replacement, the cost may increase due to the work necessary to prepare the kitchen for the new appliance. A gas oven requires access to gas lines and an electrical outlet. If these are not readily available, the installation may also cost more. Wall ovens are more complicated to install, and therefore pricier, than slide-in ones. Residential installation usually costs less than installing commercial-sized ovens.