PERIPHERAL BY CHOICE: KENYA'S SUPREME COURT FIRES A WARNING SHOT ON THE INTERESTED PARTY TRAP IN APPELLATE PROCEEDINGS
Analysis by Gody Mwango
On 31st March 2026, a 5-Judge bench of the Kenyan Supreme Court [“the Court”] sitting in Mbaazi Avenue Residents’ Association & another v. Metricon Home Nairobi Company Limited & 2 others [2026] KESC 30 (KLR) reiterated a settled principle that an interested party lacks the capacity to transform itself into a principal party/appellant notwithstanding how directly the outcome of a case affects it. When Mbaazi Avenue Residents’ Association (hereafter “the Association”), a residential association in Lavington, applied to be enjoined in a constitutional petition to fight the development of 3 sixteen-storey apartment blocks in its neighbourhood, it became an interested party and not a principal petitioner. That one procedural decision before the Environment and Land Court (trial court) silently decimated its right of appeal in the years that followed.
The summarised factual basis is that both courts below dismissed the petition. Years later, the association sought to appeal to the court, and the question of standing unraveled. Before the apex court, both applicants, the Association and Millennium Gardens Management Ltd, acted as co-petitioners, a potentially problematic and unravelling reclassification. Consequently, among others, the issue before the court was whether an interested party could institute an appeal where none of the principal parties had done so.
The ruling noted that the court had the requisite jurisdiction under Article 163(4)(a), specifically because the issues at the lower courts “turned on the interpretation and application of the Constitution” [18]. Therefore, the appeal satisfied the constitutional trajectory test. The issue of standing immediately unraveled, with the court holding that even though the standing of the management company was unchallenged, the capacity of the association to appeal was not.
More specifically, while citing with approval the ruling in Macharia & another v DPP & 11 others [2022] KESC 61 (KLR), the court was unequivocal that: “An interested party cannot suddenly and on appeal transform itself into a substantive party and take over such a party’s case. In the event, we agree with the 1st respondent that an appeal by an interested party cannot be sustained” [18]. Crucially, the court relied on its inherent jurisdiction to cure the error apparent on the face of the record by properly reclassifying the association as an interested party. As such, the court permitted the appeal by Millennium Gardens Management Ltd, which was a principal party in the suit in the courts below, to proceed. More striking is the court’s ruling that the correction was possible only because a legitimate principal party remained in the proceedings. Without the management company, there would have been no appeal to save [18].
The ruling is jurisprudentially sound and aligns with other earlier findings: the Macharia case, Muruatetu & another v Republic [2016] KESC 12, and the Senate & 3 others v Speaker of the National Assembly [2025] KESC 11 all reinforce it across civil and constitutional contexts [15]. Curiously, though, the applicant association’s case sought to invoke the apex court’s indulgence based on its earlier contradictory ruling in Law Society of Kenya v Centre for Human Rights and Democracy [2014] KESC 29. LSK, which was previously an interested party in the courts below, was successful in appealing to the court. This position was met with judicial silence by the court, which is telling, as it is left for analysts to infer that perhaps, maybe perhaps, the public interest standing of the LSK is statutorily anchored, a position the association did not enjoy. For now, the distinction remains unclear and will, in time, require being confronted more directly.
The ruling depicts an underlying structural problem. For instance, many community groups that are adversely impacted by a lack of public participation, environmental harm, or zoning abuses often seek enjoinment in suit as interested parties. In this capacity, they build a sound constitutional record, only to discover that their procedural label as interested parties is a judicial ceiling to their appeal right. Indeed, the court found that in their label as an interested party, the Association had not demonstrated, “with sufficient precision,” how their environmental rights were being infringed [18].
The lessons for advocates from this ruling are direct and immediate. Any party with a genuine grievance, be it public participation, environment, or land use, must bring a suit as a principal party right from the trial court. The choice to take part as an interested party in litigation, either to avert procedural exposure or costs, may (permanently) foreclose the right to appeal in the future. The ruling in Mbaazi Avenue is the absolute until such a time that the court will revisit the issue of whether the stake of a party, be it intergenerational, environmental, or communal, could be a justifiable or sufficient basis for an independent right of appeal for interested parties. Until that moment comes, advocates must select their procedural label wisely because it may turn out to be the most consequential choice in the course of the litigation.
©Gody Mwango (Advocate). The author practises at the intersection of constitutional, human rights & judicial review law.