4. Determine the finished counter height. Standard counters are 36-inches tall. Factoring in the countertop thickness and the finished countertop height desired, level the units at the highest and lowest parts of the patio to immediately identify any potential problems. Adjust the desired countertop height if necessary to address the patio slope.
5. Once all the cabinets and back panels are in position, level, square and plumb each component.
6. Proper leveling will create a flat surface for countertop installation. It will also create even gaps between adjacent doors and drawers. Cabinet bodies must be touching neighbor cabinets at the front and back from top to bottom. If there are uneven gaps, the cabinets are not yet properly leveled.