53 Pa. Stat. § 13804
Additional land and property shall be acquired by the city in connection with an improvement only when the title acquired for the improvement shall be in fee. The acquisition of title to additional land and property, in connection with an improvement, shall be authorized in the same manner and at the same time as the acquisition of title to the land and property required for the improvement is authorized. When the acquisition of title to additional land and property in connection with an improvement is authorized, title to such additional land and property shall be acquired by the city in the manner, and according to the procedure (except in such respects as are herein set forth) provided for the acquisition of title to land and property required for the improvement, and in the same proceeding in which title to the land and property required for the improvement is acquired.
53 P.S. § 13804