Bathrooms are the room where cheap cabinetry gives itself away fastest. It is a small wet space, everything is seen from close up, and the drawers are opened several times a day by people in a hurry. So we build a vanity the way we build a kitchen: the same carcase construction, the same soft-close hardware, and the same paint line.
The two decisions that shape the room are how the vanity meets the floor and what happens around the basin. A floating vanity makes a small bathroom read larger and makes the floor easier to clean, but it needs the plumbing set out before the wall is closed up. A floor-standing vanity gives you more storage and is more forgiving on an uneven floor. Around the basin, an undermount basin gives you a clean stone run to wipe down, while a top-mounted basin gives you back a full drawer underneath.
Then it is the everyday things. A drawer notched around the waste so it still opens. A shaving cabinet with the power inside it rather than a bare socket on the tiles. Enough clearance for the tapware you have actually chosen. We work these out on the drawing rather than on site.
