were willing to forego the deck and to make other accommodations to their neighbors' concerns.
On January 9, 1989, the Commission issued a decision denying the Raffertys' application. The Commission stated that it agreed with the views expressed by the Office of Planning, by ANC 3-D, by the Sampertons, and by other persons opposed to the modification of the PUD. In particular, the Commission found that the Raffertys' proposed addition
would result in a significant reduction in the open space quality of the PUD site, would have a negative effect on privacy and would reduce the light and air of adjacent property owners.
The Commission also found merit in the concerns expressed by opponents regarding "negative residential value of approving the proposed modification and the integrity of the PUD process." The1154 (D.C.1990).

B. Procedural Irregularities.
The Raffertys complain of the Commission's decisions authorizing the belated filing of the report of the Office of Planning and the untimely intervention of the Sampertons. We hold that the Raffertys have failed to show prejudice.
The report of the Office of Planning was supposed to be filed ten days before the hearing. 11 DCMR § 3011.5 (1987). Filing did not occur until October 28, 1988, six days before the originally scheduled date of November 3, 1990. Since the hearing was subsequently postponed to November 17 at the Raffertys' request, however, any prejudice to which the Raffertys might have been subjected if the hearing had been held as initially scheduled was dissipated by the continuance.[7]
The Sampertons filed their application for party status on November 9, less