Built-in grills undoubtedly cost more than freestanding options, but this higher price tag comes with a lot of benefits. These models tend to be made with high-end, more durable materials, and they are designed for endurance and longevity more than the best portable gas grills. They are also the best option for a seamless, aesthetically-pleasing outdoor kitchen area, though this may require even more investment in professional set-up and installation.