Mwachenga v Omondi & 3 others (Enviromental and Land Originating Summons 005 of 2023) [2025] KEELC 3260 (KLR)
The bottom line
#The Environment and Land Court at Kwale ruled that a res judicata claim needs evidence, so it cannot be used to strike out a suit at the preliminary stage.
What this practically means
#Executive summary
#Key legal issues
#Threshold of a preliminary objection
A preliminary objection must be a pure point of law; where it requires probing of evidence it is misconceived.
The court relied on Mukisa Biscuits, Sir Charles Newbold's articulation and the Supreme Court's Aviation & Allied Workers decision to restate that a preliminary objection is argued on the assumption that all pleaded facts are correct. Because res judicata cannot be determined without ascertaining facts and probing judgments, the objection fails the threshold.
Res judicata as a preliminary objection
The plea of res judicata requires ascertainment of facts such as identity of parties, issues and prior judgments, and so cannot be disposed of at the preliminary stage.
Section 7 of the Civil Procedure Act sets the test for res judicata, which the Supreme Court in IEBC v Maina Kiai held must be satisfied conjunctively. The Plaintiffs disputed the identity of parties and the similarity of the prior suits, and the Defendant annexed none of the prior pleadings, so the court could not determine res judicata without probing evidence.
Costs of the objection
The Plaintiffs are entitled to costs as the objection was defeated.
Section 27 of the Civil Procedure Act provides that costs follow the event. Having failed to meet the legal threshold, the Defendant's preliminary objection was dismissed, making the Plaintiffs the successful party entitled to costs of the objection.
Legal principles established
#- A preliminary objection raises pure points of law argued on the assumption that all facts pleaded by the other side are correct; it cannot be raised where facts must be ascertained or judicial discretion exercised.
- Whether a suit is res judicata requires probing of evidence and is therefore incapable of being handled as a preliminary objection.
Court orders
#- 1.The Notice of Preliminary Objection dated 14th January 2025 is found to lack merit and is dismissed entirely.
- 2.Mention on 26th June 2025 for a Pre-Trial Conference pursuant to Order 11 of the Civil Procedure Rules, 2010.
- 3.Hearing date of the matter on 29th October 2025 through physical means.
- 4.Costs of the Preliminary Objection awarded to the Plaintiffs.
- Jurisdiction invoked
- Article 162(2) of the Constitution of Kenya, 2010 (Environment and Land Court); suit arising from the Civil Procedure Act, Cap. 21
Key timeline
#Practical implications
#Frequently asked questions
#Later judgments citing this (1)
#Judgments in the corpus that rely on this one. Where the Court said how it treated the authority, that is shown.
Cite this brief
#Cite this brief
Caselaw, "Mwachenga v Omondi & 3 others (Enviromental and Land Originating Summons 005 of 2023) [2025] KEELC 3260 (KLR)", Case Analysis (2025). Not stated in the judgment. Source: https://new.kenyalaw.org/akn/ke/judgment/keelc/2025/3260/eng@2025-04-03
Suggested citation format for research notes or client memos. Always verify the original judgment before relying on any point.