Bought condo. Updating bathroom, including changing floor tile. HOA said when vinyl floors were updated, kitchen and bathroom cabinet bases were not removed, and new floorings were just placed around the bases. When I removed a kitchen cabinet base, I thus had 2.5 x 2.5 foot hole which i repaired. I have no need to remove the bathroom vanity (just refaced doors), but i wanted to replace the rubber toe kick with the new ceramic flooring tile. Unfortunately when I removed the rubber toe kick, the wood board it was attached to was rotted. When it was removed the bathroom vanity has a similar hole but it is filled with broken rock, grout, concrete, etc.

Because I'm not removing the vanity my options are limited. Because I lived in a condo my options are limited. Considering filling hole with lightweight rubber rocks and topped with a waterproof liner, or ignoring and installing a new wood baseboard topped with the floor tile. Ideas????