Conn. Practice Book § 10-54 — Pleading of Counterclaim and Setoff

In any case in which the defendant has either in law or in equity or in both a counterclaim, or right of setoff, against the plaintiff's demand, the defendant may have the benefit of any such setoff or counterclaim by pleading the same as such in the answer, and demanding judgment accordingly; and the same shall be pleaded and replied to according to the rules governing complaints and answers. (See General Statutes §§ 52-139 to 52-142.)