[park381]

Originally Posted by Gayle

More houses on the same space of land!

I'm not saying that as a positive because I don't particularly like the idea of a three storey house, but even so, I'm sure that's why the developers do it.

3 storey means more floor area in the house, and as you say on the same plot of land as a normal 2 storey house, also at not a lot of extra cost to the builder.
My son lives in a new 3 storey house in St Helens, they have finished up having a conservatory built on at the back, to save them keep going up to the 1st floor lounge.