Double wall ovens take a lot of carpentry and electrical know-how and should only be handled by a qualified service technician. Installation costs between $100 and $250, so be sure to factor this into your oven’s overall cost. While you won’t have a direct hand in the installation work yourself, it is important not to neglect the planning that will make the whole process move smoothly. Make sure to measure ahead and ensure you have a space in your kitchen that is well-fitted to the oven.