Date: Jul 17, 2026

Developer Liability for Foreseeable Tree-Root Uplift Hazards After a Road is Taken in Charge; Nonfeasance Bars a Claim Against the Road Authority Absent Misfeasance or Notice

1) Introduction

Loua v South Dublin County Council; Loua v. Cavan Developments Ltd and Ors (Approved) [2026] IEHC 511 is a High Court decision (Brett J., delivered 17 July 2026) arising from a trip-and-fall on a public footpath in a housing estate. The plaintiff tripped at an expansion joint where a concrete lip (measured at roughly 10–15mm) had formed and suffered a serious left-shoulder fracture.

The main contest was between (i) the developer, who designed and constructed the estate layout and planted an original lime tree in the adjacent verge, and (ii) the local authority (South Dublin County Council), which had taken the relevant roads, footpaths and grass margins “in charge” as public roads in 2009 under the Roads Act 1993.

Core issues included: (a) what caused the uplift; (b) whether the developer remained liable for a hazard that manifested after taking-in-charge; and (c) whether the Council was liable or protected by the misfeasance/nonfeasance distinction (and related “no private law duty from public powers” authorities), particularly where it had no notice of the defect.

2) Summary of the Judgment

Defect and causation proved: The Court accepted engineering and arboricultural evidence that a 10–15mm height differential at an expansion joint constituted a trip hazard, caused the fall, and was caused by tree-root uplift from the original lime tree.
No contributory negligence: The plaintiff was not found to have failed to keep a proper lookout.
Developer liable: The developer was held legally responsible for creating a foreseeable risk by selecting/planting an unsuitable tree species in a constrained verge without mitigation (e.g., a root barrier). Liability was strengthened by evidence that the developer removed the tree about six months before the accident, when the defect already existed, yet did not remediate the footpath or notify the Council.
Council not liable: The claim against the Council was dismissed as nonfeasance: the Council did not create or worsen the hazard and had no notice; the complaint was framed as a failure to discover and repair a defect created by others. The Court declined to decide broader novel questions about whether and when tree-management functions might generate private law liability.
Damages: General damages of €110,000 were awarded (€65,000 past; €45,000 future). No special damages were awarded.

3) Analysis

3.1 Precedents Cited and Their Role

A. Public-law powers vs private-law duties

The Council relied on authorities reflecting judicial caution in converting statutory/public responsibilities into actionable private duties:

Convery v. Dublin County Council [1996] 3 I.R. 153 and Sunderland v. Louth County Council [1990] I.L.R.M. 658: planning/authority functions characterised as for the public at large, not ordinarily generating a duty of care to individuals.
Glencar Exploration plc. v. Mayo County Council (No. 2) [2002] 1 I.R. 84: foreseeability and statutory power alone do not create a common law duty; reluctance to impose liability for omissions.
Flynn v. Waterford County Council [2004] IEHC 335: cited as part of the general line limiting private law liability from public functions.
University College Cork v. ESB [2020] IESC 38: invoked (via the plaintiff and the discussion in Best v. South Dublin County Council [2024] IEHC 243) for modern principles where liability may arise despite not creating the danger—particularly assumption of responsibility and special control.

Brett J. treated these as “serious and well founded” in principle, but ultimately did not need to finally resolve whether the Council owed a duty grounded in tree-management functions, because (even assuming some duty) the claim was defeated by nonfeasance on the facts found.

B. Misfeasance vs nonfeasance in highway/road cases

The operative legal engine of the Council’s success was the reaffirmed Irish position on nonfeasance:

O'Riordan v. Clare County Council [2021] IECA 267: central authority reaffirming the distinction, approving historic and UK lines (including “Harbinson through Gallagher, Gorringe, Nash and Baxter”). The Court drew heavily on O’Riordan’s formulation that the defendant “did not make things worse but merely failed to make them better,” and on the concept that dedication/taking-in-charge means the public takes the highway “defects and all.”
Gallagher v. Leitrim County Council [1955] 89 I.L.T.R.: approved statement (Kingsmill Moore J.) that a roads authority is not liable for leaving roads/footpaths in improper repair (nonfeasance), but is liable if it does something “so as to create a danger” (misfeasance).
Gorringe: relied upon via O’Riordan for the proposition that no one had ever been liable in private law for non-repair of a highway.

Brett J. characterised the plaintiff’s Council case as a paradigmatic nonfeasance claim: a failure to discover and remedy a hazard created by others, with no evidence that the Council created, exacerbated, or had actual notice of the defect.

C. Trees as a potentially distinct category (left open)

The plaintiff’s attempt to distinguish tree-root uplift from ordinary road defects was framed through Best v. South Dublin County Council [2024] IEHC 243, where O’Higgins J. noted there was no Irish authority on applying nonfeasance to trees and posed questions such as “Does a tree form part of a public road? Does the defence of non-feasance apply to trees?”

Brett J. acknowledged the force of the “trees are different” argument (living organisms; progressive, foreseeable growth; potential control through tree policy), but exercised restraint and refused to decide more than necessary. This leaves the “tree-management duty/special control” route available for future litigation where facts and evidence properly raise it.

3.2 Legal Reasoning

A. Factual findings drove liability allocation

The Court made clear, sequential findings:

Hazard: 10–15mm differential at an expansion joint was a trip hazard.
Mechanism: Uplift was caused by roots from the original lime tree; no root barrier was installed.
Foreseeability: Root ingress and secondary thickening beneath slabs was a known, predictable phenomenon for such a species in a constrained verge, especially near an expansion joint offering a favourable micro-environment.
Developer’s continuing involvement: The developer arranged removal of the lime tree in late 2017 following resident complaints; the Court inferred the footpath defect already existed at that time.
Non-notification/non-remediation: There was no evidence the developer repaired the footpath or warned/notified the Council of the defect when removing the tree.
Council’s position: The Council did not plant/remove the tree, did not create or worsen the hazard, and had no record of complaints/notice.

B. Why the developer remained liable despite taking-in-charge

The developer argued that taking-in-charge in 2009 transferred responsibility to the Council and that the footpath appeared flush at that time. Brett J. held that these points did not answer whether the developer had created a foreseeable, latent mechanism of danger through design/species selection and omission of root-management measures.

The Court effectively treated the developer’s wrong as the creation of a risky condition whose harmful manifestation was foreseeable over time, rather than as a defect necessarily visible at handover. The late-2017 removal of the tree (with the hazard already present) and silence to the Council was treated as an “evidential bridge” linking the initial creation to the accident, reinforcing that developer responsibility had not been cleanly displaced by the handover.

C. Why the Council succeeded: nonfeasance as the narrow dispositive ground

The statutory context mattered but was not determinative. Section 2 of the Roads Act 1993 defines “road” to include a footpath; “maintenance” includes improvement and management. However, section 2(3) provides that nothing in the Act affects any existing rule of law on road authority liability for failure to maintain.

Brett J. treated O'Riordan v. Clare County Council [2021] IECA 267 as decisive that Irish law preserves nonfeasance in public road maintenance, and on the findings here the Council “merely failed to make [the footpath] better” rather than making it worse. The claim therefore fell within nonfeasance.

Importantly, the Court signposted that different facts (e.g., proven notice to the Council, or evidence of Council tree-management acts creating/worsening risk) might have required grappling with the more novel “trees/special control” arguments; but those facts were absent here.

3.3 Impact

Developer-focused litigation in root-uplift cases: The decision encourages plaintiffs to scrutinise developer design/species selection, planting distances, and mitigation (root barriers), rather than assuming the roads authority is the natural defendant post-taking-in-charge.
Practical warning for developers post-handover: Where a developer remains involved (e.g., instructing contractors to remove/replace trees) the failure to remediate adjacent infrastructure or to notify the road authority may materially strengthen causation/responsibility findings against the developer.
Local authority defence remains robust in nonfeasance fact patterns: Absent misfeasance or proof of notice/positive acts, O’Riordan-style nonfeasance continues to defeat claims framed as failure to inspect/repair.
Open door on “tree management” duties: The Court deliberately left unresolved whether—and in what circumstances—local authority tree policies or control of street trees might amount to assumption of responsibility/special control (per University College Cork v. ESB [2020] IESC 38) sufficient to ground liability notwithstanding highway nonfeasance doctrine.

4) Complex Concepts Simplified

Taking in charge: A local authority’s formal acceptance that specified estate roads (including footpaths and grass margins, as here) become public roads for which it performs statutory road functions.
Misfeasance vs nonfeasance: Misfeasance is doing something that creates or worsens danger (potentially actionable). Nonfeasance is failing to repair or improve an existing defect (traditionally not actionable in highway/road maintenance), affirmed in Ireland by O'Riordan v. Clare County Council [2021] IECA 267.
Assumption of responsibility / special control: Modern negligence concepts (discussed in University College Cork v. ESB [2020] IESC 38) where a defendant who did not create a hazard may still owe a duty if it has taken responsibility for managing the risk or has particular control over the danger.
Expansion joint and root uplift: An expansion joint is a gap between slabs allowing movement; it can also allow moisture/air exchange, encouraging roots to grow beneath slabs. Over time, roots thicken and lift slabs, creating a “lip” that can trip pedestrians.
Root barrier: A construction measure installed to direct roots downward/away from pavements and reduce the risk of root ingress beneath slabs.

5) Conclusion

[2026] IEHC 511 delivers a fact-driven but important allocation of responsibility in tree-root uplift litigation: where a developer’s species selection and planting in a constrained verge foreseeably causes progressive root ingress and footpath uplift, the developer may be held liable even long after the estate is taken in charge—especially if it later intervenes (e.g., removes the tree) without remediation or warning. Conversely, a road authority that did not create or exacerbate the hazard and had no notice is protected where the claim is properly characterised as nonfeasance, in line with O'Riordan v. Clare County Council [2021] IECA 267.