How have the courts considered whether adjacent landowners have a sufficient interest to be entitled to procedural fairness?

Neither Hutterian Brethren Church of Scotland v. Starland No. 47 nor Chernipeski v. Lacombe involved a serious issue about whether adjacent landowners had a sufficient interest to be entitled to procedural fairness. A statutory authority either exercised a discretion affecting the enjoyment of adjacent land, or attempted to cure an unlawful permit by creating such a discretion. So there is no significant commentary in those cases about sufficiency of interest, rather the courts deal directly with the question of bias.