Step 9. Level and Fasten the Vanity
Slide the vanity into place, making sure it’s level, back-to-front and side-to-side. If your vanity doesn’t have adjustable feet, adjust it with shims, trimming as necessary with a utility knife. If you’re fastening your new vanity to drywall, it’s best not to reuse existing holes. However, if your old vanity was attached to a tile wall, use the existing holes, marking them with a vertical line. Center the vanity and mark for screw placement. Drill your holes, then install the new vanity with screws.