My parents have a 3-floor townhouse and it's far, far more practical than the goofy sprawling "open floorplan" designs. Plus not having neighbors above/below you is a great tradeoff. I don't think this is as impractical as it would appear to someone not living in one (that's been my experience at least).
The floor space of an actual Dublin Georgian townhouse is frankly enormous - the houses seem narrow but they’re very deep. We’re talking 5000 square feet between the 4 floors in a country where the average house is 1000 square feet. And that’s in the densest part of a dense, old city.
These things weren’t built for mom, dad and 2.4 kids, but much larger families (6? 8 kids?) who were rich enough to have their own staff living alongside. Many were eventually subdivided into tenements and by the 20th century one street managed to fit 835 people between 15 houses.
There’s a reason well maintained Georgian houses sell for approaching €2 million euro. These new Georgian-style builds are targeting the very wealthy rather than trying to be practical city centre housing, in Ireland at least.
> There’s a reason well maintained Georgian houses sell for approaching €2 million euro.
Which is still a good bit less than you'd expect for the square footage (that would work out to 4-500eur/sqft, which would def. be on the low end for the areas they're most found in), reflecting the awkwardness of the layout.
That’s a problem with the square footage, not the number of stories. It is well within the realm of possibility to have a reasonably sized 3 or 4 story townhouse. It can even have Georgian design elements while being reasonably sized.