Unlike real hardwood flooring, laminate boards are scratch- and impact-resistant. Laminate flooring is made from a combination of resins that are bonded together at extremely high temperatures to produce a strong and durable finish. While a bulky bathroom vanity unit would be likely to mark up a hardwood floor, the impact on laminate boards would be less dramatic.
If you're worried about the impact your bathroom vanity unit will have on your laminate flooring, you can buy protective pads to stick to the parts of your unit that come into contact with the floor. These pads are available from hardware stores and online. They come in a range of different sizes to fit furniture of different sizes and dimensions.
It’s possible to buy a bathroom vanity unit that can be mounted onto your wall. This type of setup will not come into contact with your laminate flooring and can provide additional storage space in the area between the vanity base and the floorboards. A wall-mounted unit will not be suitable if your walls are constructed of thin plaster board, however.
You can limit the impact your bathroom vanity unit has on your laminate flooring by making sure it moves as little as possible. Laminate flooring is more likely to sustain damage if the vanity unit is regularly jostled around. Position the unit away from the bathroom door and areas where it's less likely to be knocked around.