Questions & Answers about Мой дом старый, зато уютный.
Зато is a coordinating conjunction used to introduce a positive or compensating fact in contrast to a negative one. While но simply means but (neutral contrast), зато carries the nuance of “but at least”, “yet”, or “on the bright side”.
Example:
• Мой дом старый, но холодный. – My house is old but cold.
• Мой дом старый, зато уютный. – My house is old, but at least it’s cozy.