Callaghan v An Bord Pleanala

Factual and Procedural Background

The Appellant objected to a proposed 46–turbine wind-farm near The City promoted by Company A. In May 2014 Company A began the statutory pre-application consultation with the planning board (“the Board”). On 11 September 2014 the Board, acting ex parte, opined that the project constituted a “Strategic Infrastructure Development” (SID) under the Planning and Development (Strategic Infrastructure) Act 2006. Consequently, any planning application had to be made directly to the Board rather than to the local planning authority.

The Appellant sought judicial review of that SID designation. The High Court (Judge Costello) refused leave ([2015] IEHC 357) but certified a question of exceptional public importance. The Court of Appeal (Judge Hogan) answered that question in the negative ([2016] IECA 398). Although the underlying planning application was later refused and the dispute became moot, the Supreme Court (Judge Clarke, Chief Justice) granted and heard a further appeal to resolve the legal issue because it was likely to recur.

Legal Issues Presented

1. Whether an interested third party has a legal or constitutional entitlement to be heard before the Board decides, under s 37A of the Planning and Development Act 2000 (as amended), that a proposed development is an SID.
2. Whether the Board, at the later substantive permission stage, may lawfully revisit issues (such as strategic importance) considered during the SID designation without infringing s 50(2) of the 2000 Act, which restricts challenges to Board decisions to judicial review.

Arguments of the Parties

Appellant’s Arguments

• The ex parte SID designation finally and materially affects third-party rights because it predetermines matters of “strategic importance,” influences the ultimate permission decision and alters procedural safeguards.
• Differential procedures for SID cases (e.g., modification powers, absence of land-owner consent requirements, altered notice and appeal regimes) disadvantage objectors, thus triggering constitutional and EU-law rights to be heard (Dellway standard and Aarhus principles).
• If the Board were free to revisit its SID opinion later, that would contravene s 50(2) by “questioning” its own earlier decision other than via judicial review.

Respondents’ and Notice Parties’ Arguments

• The SID opinion is purely procedural; it does not finally determine substantive rights and therefore does not attract a right to be heard.
• All matters—including strategic importance—remain open for full reconsideration at the substantive decision stage; therefore no material prejudice arises.
• Section 50(2) bars collateral attack on the SID decision, but re-examining strategic importance within the later merits decision is not such an attack; it serves a different statutory purpose.
• Any procedural differences between SID and ordinary applications are insufficiently material to satisfy the Dellway threshold for fair-procedure rights.

Table of Precedents Cited

Court’s Reasoning and Analysis

Judge Clarke first analysed the statutory scheme. Sections 37A–37E create a two-step process: (1) a preliminary, developer-only consultation resulting in an SID opinion; and (2) a full, merits-based permission decision. Applying constitutional principles, especially East Donegal, the Court held that any such two-stage scheme must be interpreted so that earlier ex parte opinions do not bind the later merits decision. Therefore:

• The Board is obliged to reassess strategic importance, environmental impact and all other relevant matters afresh when determining the substantive application.
• This reassessment does not “question” the validity of the earlier SID opinion and thus does not breach s 50(2).

Because everything remains open at the substantive stage, the Court found no “material or practical effect” on the Appellant’s rights arising from the SID opinion. Consequently, the Dellway threshold for a hearing right was not met.

The Court then examined each procedural disparity invoked by the Appellant (consultation advice, amendment powers, notice requirements, development-plan contravention procedures, land-owner consent). In every instance it concluded that the differences were either:

• Illusory (e.g., land-owner consent applies equally under both regimes); or
• Insufficiently significant to impede the Appellant’s ability to object effectively at the substantive stage.

Finally, potential EU-law concerns (Aarhus participation rights) were neutralised by the Court’s construction that “all options remain open” when public participation actually occurs.

Holding and Implications

APPEAL DISMISSED.

The Supreme Court confirmed that an interested third party has no entitlement to participate at the preliminary SID-designation stage. The Board may reconsider all strategic and environmental questions during the final permission decision, preserving constitutional and EU-law fairness. The decision removes uncertainty about SID procedure but sets no new substantive precedent; it primarily clarifies existing statutory interpretation and fair-procedure thresholds.