AA Screening Must Match the Project Screened; EIA Inapplicable to Pure Use Permissions; Limits on “Agreement with Planning Authority” Conditions

1. Introduction

The proceedings concerned a planning permission granted by An Coimisiún Pleanála (“the Commission”) for the use of part of an existing agricultural field as a private airstrip in County Galway. The airstrip had a planning history of successive time-limited permissions (2011 and 2018), with periods where no permission was in force. The planning authority granted permission in February 2024; the applicant (a local resident) appealed; an inspector recommended a grant but with a further five-year time limit; the Commission granted permission without any duration limit.

The applicant’s judicial review advanced a broad set of domestic and EU-law complaints, including: (i) that the Commission effectively granted a different development from that applied for by removing the time limit; (ii) inadequate reasons for departing from the inspector’s recommended condition; (iii) alleged defects in public notice and plans; (iv) EIA and AA screening errors; and (v) that a condition allowing use of a different aircraft “unless otherwise agreed” with the planning authority was uncertain and unlawfully expansive.

2. Summary of the Judgment

The High Court dismissed the proceedings and refused certiorari. However, the Court held that the applicant had achieved two clarifications of practical legal significance:

• Interpretation of Condition 3 (“unless otherwise agreed”): the Court directed that the perfected order should recite a restrictive interpretation of Condition 3, limiting it to substitution of a single aircraft and excluding any materially more impactful aircraft or any move to multiple aircraft.
• (Obiter) AA screening when the Commission differs from the inspector: if the Commission changes what is being assessed/screened compared with the inspector’s screening basis, it should carry out a fresh AA screening. On the facts, no breach arose because the inspector’s screening had to be read as relating to the unmitigated project.

Key holdings also included:

• The applicant’s “res judicata” type argument (that prior time-limited permissions compelled a further time-limited permission absent changed circumstances) was rejected as legally untenable.
• The Commission gave sufficient reasons on the main issues; no obligation existed to “engage with” submissions in a discursive way.
• EIA did not arise because the permission was for use without relevant physical works, and, in any event, the airstrip was not an “airport” project of the listed kind.
• The applicant failed to discharge the onus of proof on alleged defects in notice/plans and in environmental screening.

3. Analysis

3.1 Precedents cited and how they shaped the outcome

(A) Pleadings discipline: applicants confined to their case

The judgment is framed by a strong pleading discipline, anchored in Supreme Court authority that judicial review applicants are confined to their pleadings:

• A.P. v. Director of Public Prosecutions [2011] IESC 2
• Khashaba v. Medical Council [2016] IESC 10
• Casey v. Minister for Housing, Planning and Local Government & Ors. [2021] IESC 42
• Concerned Residents of Treascon and Clondoolusk v. An Bord Pleanála & Ors. [2024] IESC 28

Humphreys J. applied these authorities to pare back a number of arguments as inadequately pleaded (notably some sweeping “non-compliance with regulations” pleas and vague EU-law assertions). The approach reflects the broader modern line that complex planning/EU-law challenges must be pleaded with precision and not left to forensic improvisation at hearing.

(B) Reasons: “main reasons on the main issues”, not discursive engagement

On reasons, the Court relied on the well-known standard that the decision-maker must give the “main reasons on the main issues” (not an issue-by-issue rebuttal), drawing on:

• Connelly v. An Bord Pleanála [2018] IESC 31
• O'Keefe v. An Bord Pleanála [1993] 1 I.R. 39
• Faulkner v. Minister for Industry and Commerce 1997 WJSC-SC 962
• Oguekwe v. Minister for Justice, Equality and Law Reform [2008] IESC 25
• Rawson v. Minister for Defence [2012] IESC 26

The Commission’s direction included an explicit note: it “did not note any justification to limit the grant of permission to five years.” The Court treated this as adequate reasons in context. Importantly, Humphreys J. rejected any blanket proposition that reasons are never required where the Commission declines a recommended condition; a condition could, in a different case, be a “main issue”. But on these facts, reasons were adequate and the dispute was essentially merits-based.

(C) Judicial review’s role and the irrationality standard for planning judgments

The Court positioned the case squarely within orthodox judicial review limits:

• Amariei v. Chief Appeals Officer [2026] IESC 22 (legality not merits; onus of proof)
• Sherwin v. An Bord Pleanála [2024] IESC 13 (planning evaluative judgments reviewed on irrationality standard if not tainted by error)
• the State (Keegan) v. Stardust Compensation Tribunal [1986] I.R. 642; Meadows v. Minister for Justice, Equality and Law Reform [2010] IESC 3

This framing was dispositive of multiple grounds: the applicant’s disagreement with unlimited duration, and with the intensity/noise assessment, did not show legal error or irrationality.

(D) EIA: listed projects only, and “project” requires physical intervention

A central EU-law holding was that the EIA directive did not apply. The Court relied on:

• Concerned Residents of Treascon and Clondoolusk v. An Bord Pleanála [2024] IESC 28 (EIA directive does not apply to projects not listed)
• Brussels Hoofdstedelijk Gewest and Others v Vlaamse Gewest, C-275/09, ECLI:EU:C:2011:154
• Pro-Braine ASBL and Others v Commune de Braine-le-Château, C-121/11, ECLI:EU:C:2012:225

Humphreys J. emphasised that EIA is concerned with “projects” within Article 1(2)(a) of Directive 2011/92/EU—i.e. construction works or other physical interventions. A permission for continued use of land as a private airstrip, with no construction/excavation, did not trigger EIA. The Court also distinguished an “airstrip” from an “airport” (Annex I, class 7(a), requiring runway length of 2,100m or more and conceptually involving more than a single grass strip).

(E) AA screening and mitigation: People Over Wind drives how the screened “project” is defined

The applicant argued that the inspector’s AA screening assumed a five-year permission and that dropping the time-limit changed the assessed project, necessitating renewed screening. The Court accepted, in principle (and by analogy with Ventaway v. An Coimisiún Pleanála [2025] IEHC 406), that if the Commission changes what is being screened, it should conduct its own screening.

However, the Court held no breach arose because of:

• People Over Wind and Peter Sweetman v Coillte Teoranta, C-323/17, ECLI:EU:C:2018:244

Since mitigation measures cannot be relied on at AA screening stage, the inspector’s screening could not lawfully be read as based on a conditioned (time-limited) project; it must be treated as referring to the unconditioned proposal. Therefore, the Commission’s final permission did not depart from the screened project in a way that triggered a fresh screening on these facts.

(F) Presumption of consideration and burden of proof

The Court repeatedly invoked:

• G.K. v. Minister for Justice, Equality and Law Reform [2002] 2 I.R. 418 (presumption that materials were considered if the decision-maker says so)
• An Taisce v. An Bord Pleanála & Ors. [2022] IESC 8 (onus generally on applicant in environmental assessment challenges)

This underpinned rejection of claims that submissions were not considered, that screening lacked reference to conservation objectives, and that plans/notices were fatally deficient—where the inspector and planning authority found compliance and the applicant did not meet the evidential burden to displace that.

3.2 Legal reasoning on the main issues

(1) No “res judicata” constraint from earlier time-limited permissions

The Court rejected the notion that prior five-year permissions required a further five-year permission absent changed circumstances. Planning decisions are taken de novo, and prior conditions do not freeze future decision-making. Treating temporary permission as a one-time “bite of the cherry” was described as “logic-free and authority-free”, inconsistent with the statutory scheme under the Planning and Development Act 2000.

(2) Reasons for rejecting the inspector’s recommended time-limit

Even assuming the duration question could be a “main issue” in some contexts, the Commission’s note that it saw “no justification” for a five-year limit was sufficient. The Court also treated the applicant’s complaint as, at bottom, a disagreement with planning judgment rather than a legal deficiency in reasoning.

(3) The Commission did not grant a different development than applied for

A critical factual/legal point was that the application itself was not for a time-limited permission. The planning authority’s imposition of a time-limit did not deprive the Commission, on third-party appeal, of jurisdiction to grant the permission actually sought. The applicant’s appeal may have produced an “own goal” (a more favourable outcome for the developer), but that is not a ground of illegality.

(4) EIA complaints collapsed because EIA was not engaged

Once the Court characterised the permission as a use permission without physical intervention, EIA-based grounds were structurally incapable of succeeding. This also eliminated derivative arguments about public participation allegedly being bypassed by later “agreement” under Condition 3.

(5) AA screening upheld; no evidential basis for scientific doubt

The inspector’s AA screening relied on the scale/nature of the development, absence of works, and distance/lack of pathways to Lough Corrib SAC. The applicant’s assertions about noise/disturbance did not (without objective evidence) demonstrate reasonable scientific doubt, particularly where an AA screening report addressing conservation objectives was on file.

(6) Condition 3: uncertainty rejected, but meaning narrowed by recital

The Court’s most practically significant intervention was its clarification of Condition 3. It held that:

• Condition 3 allows substitution of aircraft “from time to time” (not only pre-commencement);
• it does not permit use of more than one aircraft at any one time;
• it does not permit substitution to an aircraft significantly different in adverse effects so as to create a genuine planning issue;
• any purported “radical expansion” by agreement would be ultra vires the permission.

This approach reinforces an interpretive principle: planning conditions must be read as a reasonable addressee would read them and in light of their stated purpose (“controlling extent and intensity” and limiting impacts), not as mechanisms for unbounded future intensification outside public process.

3.3 Impact

(A) EIA boundary for use-only permissions

The judgment consolidates a firm domestic application of CJEU authority that EIA is not engaged by permissions that are purely for use/change of use without physical intervention. This is likely to be cited where litigants attempt to reframe operational impacts (noise, emissions, disturbance) as triggering EIA in the absence of project works.

(B) AA screening and “what was screened” when consent is conditioned/varied

Although the point was ultimately fact-specific, the obiter guidance that the Commission should re-screen for AA where it varies the inspector’s screening basis offers a clear compliance signal for future cases—particularly where the Commission changes the project description, scale, intensity, or embedded assumptions that informed screening.

(C) Drafting and policing “unless otherwise agreed” conditions

The recital-driven narrowing of Condition 3 is a practical precedent in two directions:

• for developers and authorities: such conditions will be read as limited to matters within the assessed “envelope” of effects;
• for objectors: uncertainty arguments may fail if a lawful and sensible limiting construction is available, but courts may still clarify the operative meaning to prevent administrative drift.

(D) Litigation discipline: pleading, proof, and avoiding “merits dress-up”

The decision exemplifies the contemporary trend in Irish planning judicial review: courts will insist on precise pleading, evidential proof (especially for environmental defects), and will robustly distinguish legality from disagreement with planning merits.

4. Complex Concepts Simplified

• EIA (Environmental Impact Assessment): an EU procedure required only for certain listed categories of “projects”. A “project” generally means physical works or physical interventions. Operational impacts alone do not trigger EIA if there is no relevant project.
• AA screening (Appropriate Assessment screening): the stage-1 question under the Habitats Directive: is there a likelihood of significant effects on a European site? If yes (or if doubt remains), a stage-2 AA is required.
• Mitigation at AA screening (People Over Wind): measures designed to avoid/reduce harm cannot be used to screen out likely significant effects at stage 1. Screening must be based on the project as proposed, not “made safe” by mitigation.
• Irrationality review (planning judgment): courts do not re-decide planning merits. Unless there is legal/procedural/factual error, evaluative planning judgments are interfered with only if irrational.
• “Void for uncertainty” (conditions): a condition is not invalid merely because it could be misread expansively; courts prefer a lawful construction if available and may clarify meaning, but will not treat a permission as a vehicle for future expansion outside its assessed scope.

5. Conclusion

The High Court refused to quash the Commission’s permission for a private airstrip, holding that the applicant’s principal complaints were merits-based and not supported by pleaded, proven legal error. The judgment’s enduring value lies in three clarifications:

• EIA does not apply to a use-only permission absent physical intervention and absent a listed project.
• AA screening alignment: if a decision-maker changes what is being screened compared with the inspector’s screened project, a fresh screening should follow—though People Over Wind may require the screened project to be treated as the unmitigated proposal.
• “Agreement with planning authority” conditions are confined to substitutions within the assessed envelope and cannot lawfully facilitate intensification or materially different impacts without further permission.