Casetta is a cute diminutive for house, in Italian, but actually the place is all but diminutive.
Plenty of space, plenty of style, plenty of warmth. And Nicoletta is a great B&B host, and landlord when you are on a long stay. I was there with my daughter and partner for more than 3 months and I got more than a hint of the place, thus my endorsement may have grounds and I do endorse la casetta nel parco.