Conn. Gen. Stat. § 7-147i

Any person or persons severally or jointly aggrieved by any decision of the historic district commission or of any officer thereof may, within fifteen days from the date when such decision was rendered, take an appeal to the superior court for the judicial district in which such municipality is located, which appeal shall be made returnable to such court in the same manner as that prescribed for other civil actions brought to such court. Notice of such appeal shall be given by leaving a true and attested copy thereof in the hands of or at the usual place of abode of the chairman or clerk of the commission within twelve days before the return day to which such appeal has been taken. Procedure upon such appeal shall be the same as that defined in section 8-8 .