You created value when you made the room suitable for someone else’s use rather than your own.

The "Value" of the room was created when it was constructed and taxed. The "additional value" of a remodel will be reflected in the tax statements and property value (which is usually a return when sold). The room always had value, just not as a business asset which you want. These comments and the ones below are some of the craziest mental gymnastics I've seen this year. "but the landlord is my hero and stopped me from freezing by charging me 150% on the only place I can afford because all the real mean landlords took all the other houses". It's a scam, a con. A lord and serf arrangement carried on through centuries of oppression. It's a grift, has been since it's inception. Which came first, a house or a landlord? Which one was necessary and which one was created with excess capital that was distributed unequally?

There's no new value being created, the room was created once. Renting it out takes no labor, it isn't a service, it is literally just seeking income from ownership. "Value" isn't some mystical thing, it's a measure of inputs and outputs, and in the case of renting a room out, there are no new inputs.

It becomes Private Property the second you become a landlord and rent-seek. Rather than using it for yourself, you seek value from ownership.

I'm using fairly standard understandings of rent-seeking, pretending that allowing someone else to use something you own via a fee is providing a service is landlord justification, it isn't a service.