A home from home
Definition 1 of 1
Pro Tip 1/3Emotional Attachment
This phrase often implies a strong emotional connection, not just physical comfort. 
Staying at my aunt's house is like a home from home; I feel so loved there.
Pro Tip 2/3Not Literal
'A home from home' doesn't mean you have two houses; it's about the feeling a place gives you. 
My friend's place is a home from home – it's where I can be myself.
Pro Tip 3/3Travel Context
Often used when traveling to describe accommodations that are especially welcoming or comfortable. 
The cozy cottage we rented was truly a home from home.