Planning Applicants Must Proactively Address New Development Plan Objectives: s.137 Fair Procedures Relief Turns on Practical Opportunity and Prejudice

Case: Garryduff Properties Ltd v An Coimisiun Pleanala and Anor [2026] IEHC 78 (Holland J)
Court / Date: High Court of Ireland, 16 February 2026
Context: Planning & Environment — Judicial Review (ss.50, 50A, 50B Planning and Development Act 2000)

1) Introduction

This judicial review challenged An Coimisiún Pleanála’s refusal of permission for a residential scheme at Kilminchy, Portlaoise, Co. Laois. Garryduff Properties Limited sought permission (initially 85 three-bedroom houses; revised to 89 units including 10 one-/two-bedroom duplex apartments). The Laois County Development Plan changed mid-process: the 2021–2027 plan took effect on 8 March 2022 and introduced a quantified housing-mix objective: Housing Policy Objective HPO1 requiring that applications for residential development of 10 units or more “Ensure that 35% … provides for single and two person households.”

The Council granted permission without addressing HPO1. A third-party appeal followed, which did not raise housing mix. The Board’s inspector initially recommended grant. The Commission then sought an addendum report specifically addressing (inter alia) housing mix under the new plan. The addendum report identified non-compliance with HPO1 (11% provided versus 35% required), but still maintained a recommendation to grant (without explicitly recommending a specific HPO1-compliance condition). The Commission refused permission on the sole basis of non-compliance with HPO1 and consequent conflict with proper planning and sustainable development.

The core issues before the High Court were:

  • s.137 PDA 2000: whether the Commission unlawfully relied on a matter not raised by the parties (HPO1/housing mix) without giving the statutory notice and opportunity to make submissions;
  • Reasons: whether the Commission gave legally adequate reasons (i) for finding non-compliance with HPO1 and (ii) for departing from the inspector’s recommendation to grant permission.

2) Summary of the Judgment

  • The Court dismissed the judicial review and refused certiorari.
  • On s.137, the Court assumed (without deciding) that there may have been a technical breach, but held that relief should be refused:
    • Garryduff had a sufficient opportunity to address HPO1 in submissions to the Commission (submissions in appeals are not confined to appeal grounds);
    • There was no substantive procedural unfairness or prejudice; and
    • Certiorari would be disproportionate as discretionary relief.
  • On reasons, the Court held the decision was intelligible and adequate:
    • HPO1 was “emphatic” and “simply quantified”; the 35%/11% comparison was straightforward;
    • The applicant itself had supplied the 11% figure; and
    • The Commission’s reason for departing from the inspector was terse but sufficient because “there was really little more to be said” on a simple quantified issue.

3) Analysis

3.1 Precedents Cited

A. How development plans function and why they matter

  • AG (McGarry) v Sligo County Council [1991] 1 IR 99 and Byrne v Fingal County Council [2001] 4 IR 565 were used to frame the development plan as an “environmental contract” and a public representation binding the planning authority to act “openly and transparently” in accordance with the plan. This underpinned the judgment’s emphasis that development-plan objectives often embody, and publicly signal, what “proper planning and sustainable development” means in the area.
  • Ebonwood Ltd v Meath County Council [2004] 1 I.L.R.M. 305 and Element Power Ireland Ltd v An Bord Pleanála [2017] IEHC 550 supported the centrality of the development plan as the “first reference point” and part of the “four corners” within which planning decisions are made.
  • Wexele v An Bord Pleanála (No. 1) [2010] IEHC 21 (and Browne’s text in Simons) was used for the proposition that plan objectives are not invariably “conclusive” because proper planning and sustainable development is overriding, yet in practice the two are often “inextricably linked.”

B. Interpreting planning text: the “intelligent layperson”

  • In re XJS Investments Limited [1986] IR 750, recently confirmed in Sherwin v. An Bord Pleanála [2024] IESC 13, grounded the Court’s rejection of “legalistic” parsing of HPO1. Holland J held that an intelligent layperson would broadly equate “one- and two-bedroom units” with accommodation for “single and two person households.” This mattered because Garryduff’s reasons challenge tried to create “methodology” uncertainty about the 11% figure; the Court treated that as linguistic cavilling.

C. New development plan during a pending application: decision must apply current plan

  • Crofton Buildings Management CLG v. An Bord Pleanála [2022] IEHC 704, [2024] IESC 12 was invoked for the settled rule that the decision-maker must determine the application/appeal by reference to the development plan in force at the date of decision. This was central to rejecting the idea that the applicant could rely on the earlier plan as a procedural shield.
  • Protect East Meath v. An Bord Pleanála & Rockmill [2025] IEHC 276 reinforced the practical warning about “hazards” of timing applications near a plan change (“Timing is everything”). Holland J used it to frame a normative expectation: applicants must manage that hazard.

D. Applicant proactivity and the limits of procedural complaint

  • McMonagail Stone v Ireland & An Bord Pleanála [2023] IEHC 223 supplied the language of “self-interested pro-activity”: applicants must “anticipate the issues” and cannot act as passive entities waiting to be told weaknesses. Holland J treated this as illuminating the general expectations on an applicant whose application spans a plan change.
  • Pat O'Donnell & Co v Dublin City Council & Uniphar [2024] IEHC 671 (citing Baile Bhruachlain Teoranta v Galway County Council [2024] IEHC 604) was used rhetorically for the principle that “the law helps those who help themselves,” reinforcing the discretionary-relief analysis.

E. s.137 PDA 2000 (notice of “other matters”) and fair procedures

  • The Commission cited Frank Harrington v An Bord Pleanála [2010] IEHC 428, Keshmore Homes v An Bord Pleanála [2023] IEHC 369, and Annagh Windfarm Limited v. An Bord Pleanála [2025] IEHC 2, but the Court observed that the existing s.137 case law did not “much assist” on the precise interpretive question raised (whether “may” excludes matters the Board “must” consider).
  • Heneghan v Minister for Housing, [2023] IESC 7 was cited on statutory interpretation of “may” (context can make “may” imperative). Holland J flagged but did not decide the planning-law implications of the may/must distinction in s.137, preferring to dispose of the case on lack of substantive unfairness and discretion.
  • Wexele v An Bord Pleanála (No. 1) [2010] IEHC 21 and State (Haverty) v. An Bord Pleanála, [1987] I.R. 485 were relied on for the flexible, contextual nature of fair procedures (“utility”; “commonsense and fair play”). This supported the conclusion that where the applicant had an available avenue to be heard but did not use it, the process is not unfair in substance.
  • Morehart v. An Coimisiún Pleanála & Abbott Ireland [2025] IEHC 418 (and [2025] IEHC 701) was important to the Court’s rejection of the notion that submissions are confined to grounds of appeal: Farrell J held observers’ submissions are not restricted in “nature or scope,” which the Court treated as a fortiori applying to an applicant responding to an appeal.
  • Reilly v An Coimisiún Pleanála & Lark Finance [2025] IEHC 659 was used for discretionary-relief factors (inaction by claimant, lack of prejudice, proportionality). These factors were decisive in refusing relief even assuming a s.137 breach.

F. Reasons in planning decisions (including departure from inspector)

  • The judgment gathered modern “reasons” principles from Rural Residents Wind Aware and Environmental Group v An Coimisiún Pleanála & White Hill Wind [2025] IEHC 600 and Foran v An Coimisiún Pleanála & Glenveagh [2026] IEHC 23, with the key touchstones drawn from Balz v An Bord Pleanála [2019] IESC 90, NECI v Labour Court [2021] IESC 36, Connelly v An Bord Pleanála [2018] IESC 31, YY v Minister for Justice and Equality, [2018] 1 ILRM 109, and Mallak v Minister for Justice [2012] IESC 59. Holland J stressed: main reasons on main issues; essential rationale; contextual and practical reading; reasons can be implicit if obvious.
  • Sexton v ABP & Fingal CC [2025] IEHC 449 (with Ventaway v An Comisiúin Pleanála [2025] IEHC 406 and McGowan v An Comisiúin Pleanála [2025] IEHC 405) was cited for an “enhanced” duty to give reasons when the Commission departs from an inspector. Holland J accepted the principle but treated its application as context-sensitive.
  • Leefield Limited v An Bord Pleanála & O'Flynn Construction [2012] IEHC 539 provided the key analogy: where the question is straightforward, a terse reason can be sufficient because “there was really little more to be said.” This became the model for upholding the Commission’s short reason for departing from the inspector.
  • Killegland Estates v Meath County Council [2023] IESC 39 supported the proposition that a decision should not be quashed for reasons if there is no “real doubt” about why it went the way it did.
  • GOCE v An Bord Pleanála [2024] IEHC 554 was addressed directly because Garryduff argued that plan non-compliance cannot, by itself, justify refusal. Holland J distinguished GOCE as fact-specific and rejected reading it as a general rule that plan non-compliance can never suffice to ground a conclusion on proper planning and sustainable development.
  • Clane Community Council v. An Bord Pleanála [2023] IEHC 467 supported the characterization of quantified objectives as “simple, straightforward and mathematical,” assisting the conclusion that the Commission’s reasoning here was adequately transparent.

G. Pleading discipline and “scattergun” grounds

  • Ballyboden Tidy Towns Group v. An Bord Pleanála & Ors. [2022] IEHC 7 was used to caution that ambiguity in grounds does not benefit an applicant in judicial review, reinforcing the Court’s insistence on precise identification of core grounds.
  • Shatter v Guerin [2021] 2 IR 415 and SWI, IFI, Sweetman & Ors v ALAB et al [2024] IEHC 421 were invoked to condemn unjustified allegations of bias/prejudgment as “ugly” and requiring a proper factual and legal basis.

H. Reasons to “illuminate” future applications

  • Weston v An Bord Pleanála [2010] IEHC 255 and South Bucks District Council v Secretary of State for Transport, Local Government and the Regions [2004] UKHL 33 were raised to suggest reasons should indicate what might be acceptable in a future application.
  • Holland J preferred West Wood Club Ltd v An Bord Pleanála [2010] IEHC 16, which held Irish law does not impose a duty to specify what would be acceptable in a future application; reasons must equip a party to appeal or judicially review the present decision.

3.2 Legal Reasoning

A. The “new development plan” problem: applicants bear the risk and must respond

A distinctive and practically important thread in the judgment is its explicit treatment of what happens when a development plan changes during a pending application/appeal. Drawing on Crofton and the practical warning in Protect East Meath, the Court framed a clear expectation: where the “target shifts” because the operative plan changes, a prudent applicant must “shift one’s aim.”

Holland J treated HPO1 as neither subtle nor marginal: it was a new, emphatic (“ensure”) and quantified (35%) objective newly introduced into the operative plan. Given Garryduff’s own stated 11% provision, the “hazard” to the application was “obvious.” The Court’s approach is not that the Commission had to coach the applicant through the risk; rather, the applicant was expected to proactively address it—by redesign, proposing conditions, or making submissions (including a case for material contravention being acceptable).

B. s.137 PDA 2000: technical breach vs substantive unfairness

The Court did not finally resolve a potentially significant interpretive question: whether s.137 is confined to “matters” the Board “may” have regard to (discretionary matters) and excludes matters it “must” have regard to (like the operative development plan). Holland J flagged the practical complexity: although the Board “must” have regard to many documents, most will be irrelevant in any given case, and in practice “may/must” can blur.

Instead, the Court assumed breach arguendo and disposed of the claim on fair procedures and discretion:

  • Opportunity to be heard existed: In a de novo appeal, submissions by a party responding to an appeal are not confined to the appeal’s grounds. The applicant could and should have addressed HPO1 in time. The fact that Garryduff’s submission was rejected as out of time did not convert that into unfairness; the unfairness, if any, lay in Garryduff’s failure to use the available opportunity properly.
  • No prejudice; relief disproportionate: Because s.137’s animating principle is audi alteram partem, and because that principle was satisfied in substance, certiorari was refused as a discretionary remedy (invoking proportionality, inaction/passivity, and absence of prejudice).

C. Reasons: quantified policy objectives can justify terse reasoning

The Court treated HPO1 compliance as a simple quantified comparison. Garryduff’s reasons challenge—complaining of lack of “methodology” and uncertainty as to how 11% was derived—failed because: (i) Garryduff itself had presented the 11% figure; and (ii) the Court rejected attempts to separate “one- and two-bedroom units” from “single and two person households” as contrary to the XJS “intelligent layperson” approach.

On the separate statutory requirement to give reasons for departing from the inspector (s.34(10)), the Court held the Commission’s explanation essentially repeated its refusal reason—but that can be sufficient. Critically, the inspector’s first report did not address HPO1, and the addendum did not clearly recommend a concrete HPO1-compliance condition. The Commission’s divergence therefore turned on a single, straightforward quantified point: 35% required vs 11% proposed. Applying Leefield and Killegland, the Court held there was no “real doubt” about why the Commission differed and “little more to be said.”

D. Development plan non-compliance and “proper planning and sustainable development”

Although Garryduff relied on GOCE to argue that plan non-compliance cannot, per se, justify refusal, the Court confined GOCE to its context and rejected any such universal rule. The judgment explains why: development plans are authoritative local articulations of proper planning and sustainable development; a decision-maker’s finding of plan contravention often communicates (and can adequately evidence) its view on sustainability and proper planning—unless context requires more.

3.3 Impact

  • Practical burden on applicants during plan transitions: The judgment strongly signals that applicants must actively manage development-plan change risk. Where a new plan introduces clear quantified requirements, silence can be fatal, and later procedural challenges will be met with the response: you had the opportunity to address it—use it.
  • s.137 challenges may fail on discretion even where arguable: Even if a matter was not raised by parties, an applicant may be refused relief if it had a fair practical opportunity (within the statutory submission window) to address it and cannot show substantive prejudice. This narrows s.137 as a “rescue” mechanism for parties who did not engage proactively.
  • Reasons jurisprudence: reaffirmation of contextual sufficiency: For quantified objectives, terse reasons can be lawful—both for refusal and for rejecting an inspector—if the rationale is obvious and leaves no real doubt.
  • Pleading discipline: The judgment is also a cautionary precedent on “scattergun” pleading and improper allegations (bias/prejudgment), signalling potential forensic and reputational consequences.

4) Complex Concepts Simplified

  • “Development plan”: The local authority’s legally adopted planning strategy and objectives for its area. Decision-makers must have regard to the plan in force when they decide.
  • “Proper planning and sustainable development”: The overarching statutory test for planning decisions. Development-plan objectives often express (but do not always conclusively determine) what that means locally.
  • De novo appeal (planning appeals): The Commission decides an appeal afresh “as if” the application were made to it in the first instance. It is not confined to the issues the appellant chose to raise.
  • s.137 PDA 2000 notice: A mechanism requiring the Commission to notify parties if it proposes to take into account “other matters” not raised by parties, and to invite submissions. In this case, even if s.137 applied, the Court found no substantive unfairness because Garryduff already had a practical opportunity to address the operative plan.
  • “Discretionary relief” in judicial review: Even if an error occurred, the court may refuse to quash a decision where doing so would be disproportionate, where the applicant suffered no real prejudice, or where the applicant’s own inaction caused the problem.
  • “Adequate reasons”: Decision-makers must give the main reasons on the main issues so that parties and a reviewing court can understand why the decision went the way it did. They do not need to write a judgment; where the reason is obvious, brevity can be acceptable.
  • The XJS “intelligent layperson” approach: Planning text is read in a practical, non-legalistic way—how a reasonable member of the public would understand it.

5) Conclusion

Garryduff Properties Ltd v An Coimisiun Pleanala and Anor affirms a pragmatic, responsibility-based approach to planning procedure and judicial review. Where a new development plan takes effect mid-process, an applicant must anticipate and address its implications; failing to do so undermines later claims of unfairness. Even assuming a technical s.137 issue, the High Court will refuse relief absent real prejudice, especially where the applicant had (and failed to use) an available opportunity to be heard. On reasons, the judgment confirms that for clear quantified policy objectives, concise reasoning can lawfully suffice—including when departing from an inspector’s recommendation—so long as the rationale is obvious and leaves no real doubt as to “what” was decided and “why.”