Housing Suitability Certificate
Plain English
It's a certificate from your comune (or sometimes the ASL) that confirms your home meets minimum size and hygiene standards for the number of people who'll live in it. A surveyor or technician usually inspects the place first.
Why it matters
You need it for family reunification, for some work permits, and for long-term EU residence. The space-per-person rules are strict, so a 40-square-metre studio won't pass for a family of four.
Real example
"Before bringing his wife and three kids over from Lahore, Imran asked the comune of Modena for an idoneità alloggiativa on his new 90-square-metre flat. A technician came by, measured every room, and the certificate arrived three weeks later."
Common confusion
The exact thresholds vary by region and even by comune, so don't rely on what a friend in another city told you. Ask your own town hall.
Official source
Ministero dell'Interno