District of Columbia Code Division II. Judiciary and Judicial Procedure § 12-310. Actions arising out of death or injury caused by defective or unsafe improvements to real property.

(a)(1) Except as provided in subsection (b), any action --

shall be barred unless in the case where injury is the basis of such action, such injury occurs within the ten-year period beginning on the date the improvement was substantially completed, or in the case where death is the basis of such action, either such death or the injury resulting in such death occurs within such ten-year period.

(2) For purposes of this subsection, an improvement to real property shall be considered substantially completed when --

(1) any action based on a contract, express or implied, or

(2) any action brought against the person who, at the time the defective or unsafe condition of the improvement to real property caused injury or death, was the owner of or in actual possession or control of such real property, or

(3) any manufacturer or supplier of any equipment or machinery or other articles installed in a structure upon real property, or

(4) any action brought by the District of Columbia government.