Finalize Hardware Location
Once you've purchased the vessel bowl and faucets for your vanity, carefully take note of measurements for the sink, hardware and the envisioned concrete top. In our project, the faucets would be hard to reach behind the glass vessel sink so we built two small backsplash shelves on either side of the gooseneck faucet for the handles also in the same 2-inch thickness.
It's a good idea to have your vanity base selected or purchased in advance. It's important to make sure the height of the vanity, once you add the concrete top and vessel sink, is comfortable for washing hands. In our project, we created a concrete pedestal but you can use a pre-made base, a cabinet with four legs or any other option.
Next, create a template out of thin wood veneer or masonite to the exact size of the proposed vanity (Image 1).
Cut the wood with a sharp table saw and make the curves with a jigsaw.
Do a dry run by positioning the template in the installation space as it's far easier to make changes to the template than to the finished vanity. Finalize the placement of the sink and hardware on the template (Image 2), outlining their location with a marker.