Fixr estimates around $4,000–$13,000 for 100 sq., assuming the outdoor kitchen is being fully constructed with a new patio, countertops, storage, grills, refirgeration, plumbing, and cover. The cost range can vary significantly, depending on a multitude of factors: Size and Layout: The overall dimensions of your outdoor kitchen area greatly influence the cost. A larger kitchen with an extensive counter area, cooking zones, and ample seating will naturally be more expensive than a. Installing an outdoor kitchen costs $7,000 to $35,000 on average. High-end, luxury outdoor kitchen projects can approach $100,000 based on high-end materials and appliances. But before you start designing your perfect outdoor cooking space, it's important to understand the cost.