In English, the phrase "casas en remate" means "homes for auction" or "homes that are for sale through auction." "Casa" is the word for "house" and "remate" means "bargain," "sale" or "close out sale through auction."
This phrase would be seen when a home is in foreclosure and the bank is auctioning it off or when someone is auctioning off the contents of an estate or home. It could also be translated to reference an auction house that puts items up for auction.
The meaning of the phrase would depend upon the context it is used. In this phrase, the word "casas" is plural so it would seem to reference "homes that are up for sale through auction."