Rectification Cures: Judicial Review Will Not Quash a Permission for a Landowner-Consent Defect Corrected by a Lawful Amendment

1) Introduction

This judgment (Rural Residents Wind Aware and Environmental Group and Ors v An Coimisiun Pleanala and Ors [I] [No. 2] [2026] IEHC 135, Humphreys J.) concerns a strategic infrastructure development (“SID”) permission for a 7‑turbine wind farm in counties Carlow and Kilkenny. The applicants challenged the “parent” permission granted on 21 November 2023, principally contending that the developer had no standing to apply for permission insofar as elements of the permitted works encroached on neighbouring land without landowner consent (core ground 1), and also advancing a constitutional/validity challenge to article 214(1) of the Planning and Development Regulations 2001 as amended (core ground 8A).

Critically, a later lawful amendment (under s. 146B) removed the offending encroachment. Module II therefore asked whether anything remained of the judicial review once the underlying practical defect had been cured, and whether the court should entertain a residual challenge to the Regulations.

2) Summary of the Judgment

  • Core ground 1 (landowner consent/standing): dismissed. The court accepted there had been a problem with the original permission, but held that the problem had been rectified by a lawful amendment; quashing the parent permission would be “overkill” and would elevate “metaphysics of invalidity” over practical justice.
  • Core ground 8A (validity of article 214(1)): withdrawn in oral submissions; in any event, the court stated it was without foundation because legislation is not unconstitutional merely for failing to restate that statutory powers must be exercised constitutionally—this is implicit (citing East Donegal Co-Operative Livestock Mart Ltd v. Attorney General [1970] I.R. 317).
  • Result: proceedings dismissed; a provisional “no order as to costs” approach was indicated, subject to written submissions.

3) Analysis

3.1 Precedents Cited

A. The court’s “practical” conception of judicial review (legality not merits; restrained reading; no micro-parsing)

The judgment situates the outcome within a body of authority emphasising the limited supervisory nature of judicial review and the avoidance of semantic or technical attacks divorced from practical consequences:

  • Sweeney v. Fahy [2014] IESC 50: judicial review addresses legality, not correctness; it is not an appeal on the merits.
  • the State (Keegan) v. Stardust Compensation Tribunal [1986] I.R. 642 and Meadows v. Minister for Justice, Equality and Law Reform [2010] IESC 3: courts should not substitute their view for the decision-maker’s.
  • R (Cart) v. Upper Tribunal [2011] UKSC 28: warns against dressing factual disagreement as a “point of law”.
  • M.R. (Bangladesh) v. International Protection Appeals Tribunal [2020] IEHC 41; Rostas v. DPP [2021] IEHC 60; St. Margaret's Recycling v. An Bord Pleanála [2024] IEHC 94; Duffy v. An Bord Pleanála [2025] IEHC 715: administrative decisions should be read sensibly and “in the round”, not in the most error-seeking way.
  • R (Blewett) v. Derbyshire County Council [2003] EWHC 2775 (Admin) and O'Sullivan v. HSE [2023] IESC 11: reject “legalistic over-parsing” and “an entitlement to elaborate procedures at every point”.
  • Okunade v. Minister for Justice [2018] IESC 56: judicial review is not “pointless formalism”.

These authorities underpin the judge’s central theme: judicial review remedies tangible legal problems; once the tangible problem is gone, insistence on quashing becomes a technical exercise rather than a proportionate response.

B. Planning judgment and deference to evaluative assessment

While the present Module II issues were not about planning merits, the judgment reiterates the standard that planning evaluative judgment is primarily for the decision-maker:

  • Tesco Stores Ltd v. Secretary of State for the Environment [1995] 1 WLR 759 (HL): weight is for the decision-maker.
  • Sherwin v. An Bord Pleanála [2024] IESC 13; Graymount House Action Group v. An Bord Pleanála [2024] IEHC 327 and Graymount House Action Group v. An Bord Pleanála [2025] IESCDET 22: planning judgments are typically reviewed on irrationality where not tainted by legal/procedural error.

C. The “eight-fold test” and the structure of judicial review relief

Humphreys J. relies on his earlier articulation of an “eight-fold path” to relief:

  • Reilly v. An Coimisiún Pleanála [2025] IEHC 659 and Foran v. An Coimisiún Pleanála & Glenveagh [2026] IEHC 23: (i) jurisdictional requirements, (ii) legal correctness and workability, (iii) pleading specificity, (iv) issue-specific standing, (v) material before decision-maker, (vi) proof, (vii) error must be material (not harmless/technical), and (viii) discretion/proportionality.

In this case, elements (iv), (vii) and (viii) do most of the work: once the amendment removed the encroachment, any remaining defect was historical/technical, and certiorari became disproportionate.

D. Harmless error / immateriality (including in EU-law contexts)

The court’s refusal to quash is reinforced by the “harmless error” line of authority:

  • Carrownagowan Concern Group v. An Bord Pleanála [2025] IESCDET 9 and Massey v. An Bord Pleanála [2025] IESCDET 126: not every error warrants quashing; harmless error is well-established, and EU law does not necessarily compel a different result.
  • Gemeinde Altrip and Others v Land Rheinland-Pfalz, C-72/12: a reviewing court may conclude a defect was harmless; it may rely on evidence “where appropriate” (as noted also in the discussion of Carrownagowan Concern Group v. An Bord Pleanála (No. 3) [2024] IEHC 549).
  • R (Champion) v. North Norfolk District Council [2015] UKSC 52; R. (Hudson) v. Windsor and Maidenhead Royal Borough Council [2021] EWCA Civ 592: supportive common-law expressions of non-automatic quashing for non-material defects.
  • Commission v Ireland (Derrybrien Wind Farm), C-261/18: after-the-event regularisation is exceptional where EU-law breaches are material—cited here as part of the framework distinguishing material from immaterial error.

Although the landowner-consent issue is framed primarily as a constitutional/property-rights point rather than an EIA/AA defect, the same core idea is deployed: the court should not grant a remedy when any “error” is now non-operative, with no live consequences.

E. Standing, ius tertii, and discretion against entertaining moot or hypothetical points

  • Cahill v. Sutton [1980] I.R. 269; Hellfire Massy Residents Association v. An Bord Pleanála [2021] IEHC 424; Conway v. Minister for Housing, Local Government & Heritage & Ors. [2024] IESC 34: applicants cannot ordinarily vindicate third-party rights (ius tertii) or pursue abstract/hypothetical outcomes not arising on the facts.
  • Friends of the Irish Environment CLG v. Government of Ireland & Ors. [2021] IECA 317: failure to raise points during participation may be relevant to discretion and good administration (quoted at length in the judgment).
  • O'Connell v. Behan [2021] IECA 186; Independent Newspapers v. I.A. [2020] IECA 19; Dun Laoghaire Rathdown County Council v. Westwood Club Ltd [2019] IESC 43: judicial review is discretionary; practicality (mootness/futility) and proportionality matter.

These cases support the court’s conclusion that, once the amendment removed the encroachment, there was no continuing injury warranting certiorari—at most a transient historical infringement that did not justify the blunt remedy of quashing an extant, corrected permission.

F. Landowner consent and constitutional interpretation

  • Frescati Estates v. Walker [1975] I.R. 177: relied on in the earlier (No. 1) judgment as informing the constitutional/property-rights premise that a planning application should not facilitate intrusion into property rights absent consent or lawful authority; in this (No. 2) judgment, that premise is treated as assumed rather than re-litigated because the practical defect has been cured.
  • Pembroke Road Association v An Bord Pleanála [2021] IEHC 403: referenced by parties as applying Frescati Estates v. Walker in a modern planning context.
  • East Donegal Co-Operative Livestock Mart Ltd v. Attorney General [1970] I.R. 317: used decisively to reject core ground 8A—laws are read as intended to be operated constitutionally; absence of an express “consent” line in article 214(1) does not itself render the Regulation invalid.

3.2 Legal Reasoning

A. The decisive point: rectification eliminates the live controversy

Humphreys J. frames judicial review as a remedy for “tangible legal problems, not to pursue technicalities”. The parent permission originally “erroneously encroached on neighbouring land without landowner consent”, but that “problem has since been rectified by the lawful amendment of the permission”. The court treats this as transforming the case from a live rights-based controversy into an essentially historical one.

The judge’s reasoning is intentionally practical:

  • Even assuming a consent defect existed and mattered when the original permission issued, once a lawful amendment has removed the encroachment, quashing the entire parent permission would be a disproportionate, blunt response.
  • The court rejects an approach that would insist on quashing because an initial decision was once “invalid” in some abstract sense: “metaphysics of invalidity” must yield to practicality and judicial restraint.
  • The judgment ties this to standing and materiality: with no continuing injury, “there is now no injury and hence no standing, or any injury is technical and de minimis”.

B. Discretion and proportionality: certiorari as “overkill”

The court’s conclusion is expressed through overlapping doctrinal lenses—standing, de minimis/materiality, and discretion—but the destination is the same: quashing is not justified where the defect has been cured. The judgment treats certiorari as a remedy whose utility and proportionality must be assessed in real-world terms (including whether the issue is “purely historic” and whether the error has been “rectified promptly when it came to light”).

C. Core ground 8A: no invalidity from omission to restate constitutional compliance

Core ground 8A alleged that article 214(1) is invalid because it does not expressly require written landowner consent for SID applications. The applicants withdrew the point, but the court nonetheless indicates the argument fails in principle: legislation need not “spell out that it can only be exercised in a constitutional manner”; that is “implicit”, and the interpretive approach in East Donegal Co-Operative Livestock Mart Ltd v. Attorney General [1970] I.R. 317 defeats the notion that omission of an express safeguard equals unconstitutionality.

3.3 Impact

  • Rectification as a practical answer to planning-application defects: The judgment strengthens a pragmatic line: where a planning permission defect (here, landowner-consent/encroachment) has been lawfully cured by amendment, the courts will be slow to quash the parent decision merely to vindicate an abstract conception of past invalidity.
  • Mootness, standing, and de minimis in planning JR: The decision encourages challengers to show a live, ongoing effect. A purely “temporal” or historical rights infringement, once remedied, may not sustain standing or justify certiorari.
  • Regulatory validity challenges framed as “omissions”: The court signals a high threshold for constitutional invalidity arguments based on the absence of an express textual requirement where constitutional compliance is presumed and implied by interpretation (per East Donegal Co-Operative Livestock Mart Ltd v. Attorney General [1970] I.R. 317).
  • Practical administration of environmental/planning litigation: The “eight-fold test” discussion (drawn from Reilly v. An Coimisiún Pleanála [2025] IEHC 659 and Foran v. An Coimisiún Pleanála & Glenveagh [2026] IEHC 23) continues to provide a structured template likely to be cited in future planning judicial reviews, particularly on materiality and discretion.

4) Complex Concepts Simplified

  • Certiorari: a court order quashing an administrative decision (here, a planning permission). It is discretionary, not automatic.
  • Standing / sufficient interest: the requirement that an applicant be sufficiently affected to bring and maintain proceedings; the judgment emphasises that issue-specific standing and a continuing practical impact matter.
  • De minimis / harmless error: a breach that is too minor, technical, or non-consequential (especially once corrected) to justify quashing.
  • Mootness: where there is no longer a live dispute because the problem has been resolved; courts generally avoid deciding moot or hypothetical issues.
  • “Metaphysics of invalidity” (as used here): an insistence that a decision must be quashed because it was once defective, even though the defect has since been cured and no practical harm remains.
  • East Donegal presumption/interpretation: courts interpret statutes and regulations as intended to be applied constitutionally; a measure is not invalid merely because it does not expressly repeat constitutional limits.

5) Conclusion

The core significance of [2026] IEHC 135 lies in its insistence that judicial review in planning is not a forum for technical victory after the practical problem has been cured. Where an original permission contained a landowner-consent/encroachment defect but a lawful amendment has removed the infringing element, the High Court will treat certiorari of the parent permission as disproportionate and unnecessary, with standing and materiality falling away. The judgment also underscores that constitutional invalidity cannot be inferred simply because a regulation does not expressly restate requirements that are constitutionally implicit, applying the interpretive approach in East Donegal Co-Operative Livestock Mart Ltd v. Attorney General [1970] I.R. 317.