AC43273 - Boyajian v. Planning & Zoning Commission (“This appeal requires us to consider whether the plaintiffs, who failed to appeal from a decision of the local zoning board of appeals to grant a variance; see General Statutes § 8-8 (b); may nevertheless collaterally attack the validity of that variance by opposing, before the local planning and zoning commission, a special permit application related to the property to which the variance attached. We conclude that the plaintiffs may not collaterally attack the validity of the variance.”)