Fake baseboard
In the same way that adding coving to a room can make it feel more luxurious, adding baseboards can do the same down at the bottom. With reasonably priced trim and moldings, along with some paint, you can create an upscale feel with only a few dollars.
If you already have thin baseboards but want to make them bigger (a good sign of an expensive renovation), then you can add a thin piece of wood above it and paint in between to match the original baseboard.