Valuation appeals include the unit of valuation: the Tribunal may review and reverse a s.17(2)(b) “split”

Introduction

This High Court judgment ([2026] IEHC 375, Ms. Justice Siobhán Phelan, 12 June 2026) concerns two “case stated” appeals under s.39(5) of the Valuation Act 2001 (as amended) arising from decisions of the Valuation Tribunal. The appellant, DAA Plc (the airport operator), challenged the Commissioner of Valuation’s decision in a 2019 revaluation to stop valuing Dublin Airport as a single rateable unit and instead to value it as three separate “relevant properties”: the Main Airport, the Car Parks, and the External Buildings.

The central legal issue was jurisdictional: whether the Tribunal, hearing an appeal under s.34, can examine and potentially overturn the valuation officer’s decision under s.17(2)(b) to subdivide a property into separately occupiable parts. The Tribunal had held it could not, treating the “split” as an unappealable administrative act and proceeding only to determine values for the car parks and external buildings.

Summary of the Judgment

  • The High Court held the Tribunal was wrong in law to conclude it had no jurisdiction to hear an appeal effectively challenging a s.17(2)(b) subdivision and was wrong to conclude it could not consider whether the s.17(2)(b) power was properly exercised.
  • The Court considered it unnecessary to answer the valuation-methodology questions (risk factors and tenant’s share in the R&E approach) or the procedural question (issuing two decisions while the third remained undelivered), because the matter had to be reheard on the correct jurisdictional basis.
  • The decisions were remitted for rehearing before a differently constituted Tribunal, with the possibility of agreeing to admit some of the previous transcript evidence to shorten the rehearing.

Analysis

1) The statutory setting: why “unit of valuation” matters

The judgment is anchored in the interaction between:

  • Schedule 3 (defining “relevant property” by categories of rateable property and the pre-existing concept of “rateable occupation”);
  • s.17 (the “unit of valuation” rule and exceptions):
    • s.17(1): each separate relevant property is valued separately;
    • s.17(2)(a): officer may combine contiguous properties occupied by one person;
    • s.17(2)(b): officer may subdivide a relevant property into parts “capable of being occupied separately” and value those parts separately, even if occupied by the same person;
    • s.17(4): once split/combined, the outcome applies “for all the other purposes” of the Act (including valuation list and certification).
  • s.34 (appeals to the Tribunal) and s.37 (Tribunal powers and jurisdiction on appeal).

The Court accepted that splitting may be administratively convenient and may not ultimately change the cumulative value. Crucially, however, it also accepted the unit decision can affect valuation methodology choices (e.g. whether a contractor’s approach might be argued for the whole property) and thus may expose a ratepayer to a higher valuation.

2) The new rule: s.34 appeals extend to reviewing a s.17(2)(b) split

The Tribunal’s approach was formal and restrictive: because s.34 does not expressly mention s.17(2)(b), it treated the split as outside its remit and suggested the only remedy was judicial review.

The High Court rejected that construction. The Court’s key interpretive steps were:

  • Reading s.34 purposively within the Act as a whole: the appeal provisions were designed to provide an extensive merits appeal in valuation matters (and remove such disputes from courts into an expert forum).
  • “Property concerned” language in s.37(1): the Tribunal must determine the value of “the property concerned” (not merely accept the administratively-demarcated “relevant property” as fixed if that demarcation is itself in issue).
  • s.34(1)(a), (b), (c) in combination:
    • An appeal against “a determination … of the value” cannot be meaningfully separated from identifying what unit is to be valued, where unit affects value/method;
    • The “details” appeal route (s.34(1)(b)) did not, by itself, necessarily decide the question (the Court noted valuation list “details” are limited), but it was consistent with a broader appellate role;
    • Most importantly, the Court saw a plausible fit under s.34(1)(c) (decisions to include or not include the property in the list): valuing the car parks and external buildings as separate entries can be framed as an inclusion decision capable of challenge.
  • Confirmatory force of s.37(2)(b)(v) and (vi):
    • The Tribunal has an express power to amalgamate relevant properties (the subject of 2 or more appeals) and to subdivide property, then to determine valuations accordingly.
    • The Commissioner argued these powers were effectively confined to revision cases because they refer to s.49. The Court found that unpersuasive: similar references to s.49 appear in contexts accepted to apply beyond revisions, and—critically—the same s.17(2) power underpins splitting in both revaluation and revision settings. It was illogical to suppose the Tribunal could address unit issues on revision but not on revaluation.
  • Judicial review is not an adequate substitute for the intended appellate remedy: JR focuses on legality and process, not merits; the Act’s structure indicates the Oireachtas intended unit/method/value disputes to be resolved in the specialist appeal forum.

The resulting principle is practical and precedent-setting for Irish valuation appeals: where a s.17(2)(b) subdivision is integral to (and potentially distorts) the valuation outcome, it is within the Tribunal’s appellate jurisdiction under s.34 to consider whether the split was properly made and, if appropriate, to amalgamate/subdivide on appeal.

3) Precedents cited and how they shaped the reasoning

Commission of Valuation v. Carlton Hotel Dublin Airport Limited & Ors. [2016] 2 I.R. 385, [2013] IEHC 170 (“Carlton Hotel”)

Carlton Hotel was the Court’s main authority for a broad understanding of the 2001 Act’s appellate architecture. Ms. Justice Phelan relied on O’Malley J.’s characterisation of the Act as creating an “unusually extensive appeal system” and allowing appeals on “any appropriate ground”. Although Carlton Hotel dealt with valuation methodology rather than unit of valuation, the Court treated its logic as transferable: if methodology—though not expressly listed in s.34—is appealable, then unit identification (which can determine methodology and value) must likewise be appealable.

Heather Hill Management Co. CLG v. An Bord Pleanála [2024] 2 I.R. 222, [2022] IESC 43

This was cited for general principles of statutory interpretation: the words of the Oireachtas are the primary guide, read in context and having regard to purpose. The Court used this lens to resist a narrow, literalistic reading of s.34 that would undermine the overall scheme.

Redwood Extended Care Facility v. Tailte Éireann [2026] IESC 3

The Court invoked Redwood (by analogy) to caution against reading implied limitations into statutory appeal rights where there is no contextual or purposive justification for doing so.

Iarnród Éireann v. Commissioner of Valuation [2022] IEHC 668 and Stanberry Investments Limited v. Commissioner of Valuation [2020] IECA 33

These cases were cited on the scope of a case stated appeal: the High Court does not rehear the merits; it intervenes for legal error, incorrect interpretation, or unsupported/unreasonable findings. This framed the Court’s approach: it corrected the Tribunal’s legal error on jurisdiction and remitted, rather than itself deciding valuation.

Celtic Roads Group (Portlaoise) Ltd. & Anor. v. the Valuation Tribunal [2013] IEHC 180

This authority supported the shared premise that the Tribunal is a creature of statute with no inherent jurisdiction. The dispute was therefore not about inherent powers, but about the correct construction of the powers actually conferred, expressly or by necessary implication, within the statutory scheme.

Honeybridge Limited and Anor. v. Commissioner of Valuation (Judgment of Hyland J., 21st of December, 2020)

The Commissioner relied on Honeybridge as suggesting s.17 decisions were not appealable. The Court carefully distinguished it:

  • Procedural posture: there was no opposing party (no legitimus contradictor), limiting the weight to be placed on broad propositions.
  • Issue mismatch: Honeybridge turned on the Tribunal deciding an unappealed point and failing to follow the statutory outcomes under s.37 (a fundamental flaw), rather than squarely deciding the appealability of a s.17 split in a valuation appeal.
  • Obiter character: to the extent that Honeybridge contained general remarks about s.17 appeals, they were not determinative on the facts and did not engage with s.37(2)(b)(v) and (vi).

4) Legal reasoning in detail: why the Tribunal’s “JR-only” model was rejected

The Court’s reasoning can be summarised as a rejection of a “two-track” remedial system (Tribunal for value, High Court for unit) where the unit decision is intertwined with valuation outcomes:

  • Functional necessity: valuation cannot be correctly determined without first identifying the property to be valued; if the unit is wrong, the valuation may be wrong.
  • Coherence with s.37 powers: express amalgamation/subdivision powers would be hollow if unit questions were categorically excluded from s.34 appeals.
  • Legislative purpose: the 2001 Act channels technical rating disputes to an expert tribunal; it would be inconsistent to carve out the unit decision (a core valuation determinant) to the courts via JR.

5) Impact

The immediate impact was to set aside the Tribunal’s restrictive jurisdictional stance and require a rehearing. More broadly, the judgment is likely to influence Irish rating practice in several ways:

  • Appeal strategy: ratepayers can frame s.17 subdivision/combination issues as part of s.34 appeals, without being forced into judicial review to challenge the unit decision.
  • Tribunal workload and reasoning: the Tribunal must address unit-of-valuation arguments where they bear on correct valuation, and cannot treat s.17 decisions as untouchable administrative choices.
  • Commissioner decision-making: valuation officers’ s.17(2)(b) decisions may receive closer scrutiny within the specialist merits appeal system, potentially encouraging more fully evidenced and articulated unit choices.
  • Revaluation vs revision symmetry: the Court’s reasoning discourages constructions that yield arbitrary differences in appealability depending on procedural route.

Complex Concepts Simplified

  • “Relevant property”: the rateable unit listed for valuation (as defined through Schedule 3 and the concept of rateable occupation).
  • Unit of valuation (s.17): deciding whether something is valued as one property or broken into multiple separate properties (or combined with others).
  • s.17(2)(b) “split”: the officer can treat parts of one property as separate properties if each part is capable of separate occupation, even if the same occupier uses them.
  • Net Annual Value (NAV): the annual rent a hypothetical tenant would pay under statutory assumptions (s.48), forming the basis for rates liability.
  • Contractor’s method (s.50): a cost-based approach (replacement cost plus site value, adjusted, then 5%), often used where there is no meaningful rental market for a specialised property.
  • Receipts & Expenditure (R&E): values a property by assessing maintainable income and costs to estimate a hypothetical tenant’s bid.
  • Case stated (s.39): a High Court appeal limited to points of law; the court does not redo valuation, but can correct legal errors and remit.

Conclusion

The High Court confirmed that the Valuation Act 2001’s appeal system is intended to be substantively effective: an appeal against valuation under s.34 can encompass the foundational question of what unit is being valued, including whether a s.17(2)(b) subdivision was properly made. The Tribunal therefore erred in treating the unit decision as unappealable and judicial-review-only. The consequence is a rehearing in which the Tribunal must consider, de novo, both the appropriate unit of valuation and (only then) the appropriate valuation methodology and NAV.