Since houses in the game aren't on wheels, your house should be wherever you left it if you've played at any time in the last 10 months since the demo timer hasn't been active long enough for it to have demo'd yet.

If you didn't have one, why are you asking where it is?

On a more serious note, Ragnarok had new houses added in 4.2, 5.1 and 5.35 just like every other world. It's false to claim that no additional plots have been added in years.

We know Ishgard housing is coming sometime after the Restoration is completed on all worlds but we don't know how long the wait will be.

In the meantime, there should be a temporary influx of available houses next week when we hit the 45 day point since the demo timer was reactivated. You might want to keep an eye out to see if you can snag one.