It is, every single time. I often end up removing it altogether. Space is kind of at a premium in Twinbrook, and since riding is not a planned supermax for any of my sims, I don't need it. Though I might reconsider, since I haven't restarted yet.
If you're considering doing a dynasty in Twinbrook, think about how a mere 40x40 lot will service your immortals. If you're not comfortable with not having an inch of extra space, you might want to book it to another town. It's still perfectly doable to complete a dynasty in Twinbrook with the limited space, but I had to have most of the house on columns so I could fit a garden on the lot.