So sell or rent out one of the houses. Having a large non-income generating asset that you don't make full use of is a luxury the non-rich can't afford.
Sometimes at least one of the houses is in some rural area nobody wants to move to so there is basically no market for them. Common in the mountains.
Real case: the parents family houses are in the mountains, parents moved to city, children (adult now) live in another city. They'll eventually inherit the 3 houses and they won't use them. The city house can be sold or rented. The other ones, not a chance. If taxes on them would be too high (they aren't now) they could rather destroy those two houses. I don't think this is what we want.
There is always the way out of renouncing the heredity. Then you still get an empty house that nobody wants and nobody maintains.
