Retention Permission Must Address Comparable Restoration of a Removed Party Boundary

1. Introduction

This judgment identifies an important limit on the use of forward-looking landscaping conditions when granting retention permission. Where the planning assessment accepts that a shared boundary hedge has been removed without agreement, it is not necessarily sufficient to require a new, generally acceptable boundary treatment. The decision-maker must address whether that treatment will fully rectify the removal by providing a boundary comparable to the former one, unless an objectively justified planning reason supports a different outcome.

The applicants were adjoining householders challenging An Coimisiún Pleanála’s grant of retention permission for agricultural buildings and associated infrastructure in County Kildare. Their complaints concerned residential amenity, environmental effects, enforcement history, constitutional rights and the removal of a boundary hedge. Almost all their grounds failed. Nevertheless, the High Court quashed the permission because the treatment of the removed hedge left an essential issue unresolved.

The decision is expressly fact-dependent. It does not establish that every allegation of unauthorised development prevents permission, that adjoining owners possess a general veto, or that the High Court determined the parties’ underlying property dispute.

2. Background and Procedural Context

The development comprised an existing farm building containing a fuel store, workshop, calf creep area, straw-bedded housing, feed passage and underground effluent tanks, together with a silage base and an unroofed slatted effluent tank.

The developer applied for retention permission in December 2023. Following a request for further information, the local planning authority granted permission in August 2024. The applicants appealed. After a site inspection and an inspector’s report, the national planning authority granted retention permission on 13 June 2025, subject to 16 conditions.

Those conditions addressed matters including landscaping, agricultural use, water management, slurry disposal, noise, lighting and financial contributions. Condition 2 required a detailed boundary treatment scheme, prepared by a suitably qualified person and agreed with the local planning authority. It envisaged predominantly indigenous hedging and trees, stock-proof fencing, planting deadlines and replacement of failed planting.

There was also a background of enforcement and private litigation. A District Court noise order had been made, while Circuit Court proceedings concerning unauthorised development and separate claims involving nuisance and property damage remained ongoing. These proceedings provided context; the judicial review did not determine those disputes.

The applicants represented themselves. The developer, although a notice party, did not participate in the hearing and later disputed their account in correspondence responding to the draft judgment. Humphreys J. expressly declined to make independent adverse factual findings against him. The court assessed the planning decision on the factual basis adopted in the inspector’s report.

3. Summary of the Judgment

The decisive distinction was between providing an acceptable boundary for the future and addressing the loss of the boundary that previously existed.

The inspector considered the proposed planting and fencing sufficient to mitigate visual impact and provide a secure screen. However, neither that assessment nor condition 2 addressed whether the replacement would be fully comparable to the removed party hedge. The condition permitted a range of outcomes, including potentially less effective restoration.

The court upheld the second element of ground 15 on that limited basis. Removal of the party boundary was a main issue requiring substantive consideration, not merely a generic landscaping problem.

Treatment of the other challenges

The order

The court ordered certiorari quashing the decision of 13 June 2025 in case reference PL09.320690. Unless a party made written legal submissions within seven days, the order was to be perfected with expenses, including reserved expenses, awarded to the applicants against the commission. Any dispute about their amount was to proceed to legal costs adjudication, with the adjudication’s costs and expenses also covered.

The operative order did not expressly grant the requested prohibition or direct remittal. The judgment therefore should not be described as permanently preventing any future permission for the development.

4. Legal Reasoning

4.1 Judicial review is not a rehearing of planning merits

Much of the judgment concerns the boundary between administrative legality and disagreement with an expert planning assessment. Expressions such as “insufficient”, “inadequate” or “excessive” consideration do not themselves identify a legal defect. Ordinarily, the decision-maker determines the weight attached to competing considerations.

Similarly, the rejection of an objection does not establish that the objection was ignored. Nor does the description of a farmyard as “established” become unlawful merely because a neighbouring dwelling is older.

These conclusions do not make planning assessments immune from review. They explain why a claimant must identify a legally significant omission, irrational conclusion or procedural defect, rather than simply seek a different balance of interests. The successful boundary ground did identify such an omission.

4.2 Retention and enforcement are distinct processes

Retention permission exists to allow retrospective consideration of development already undertaken. Its availability would be undermined if prior unauthorised construction or enforcement attention automatically removed jurisdiction to grant it.

The converse is also important. Humphreys J. warned that applying for retention does not ordinarily justify withholding otherwise warranted enforcement relief. Repeated retention applications and challenges should not enable indefinite postponement of compliance with planning law.

Those wider enforcement observations were not necessary to dispose of enforcement proceedings, which were not before the court. The operative conclusion here was narrower: existing enforcement measures did not themselves invalidate the retention grant.

4.3 Exemption conditions are not universal planning prohibitions

The applicants relied on the 100-metre separation requirement in the agricultural exempted-development provisions of the Planning and Development Regulations 2001. Their argument treated failure to meet that requirement as preventing permission without neighbouring consent.

The court rejected that inference. Exemption asks whether development may proceed without an application for permission. A planning application asks whether development should be permitted after assessment. Failure to qualify for exemption does not answer the second question.

The relevant Office of the Planning Regulator leaflet did not change the position because its discussion also concerned exemption. The court noted that development-plan separation provisions had been considered, but did not govern this particular agricultural development.

4.4 Substance matters more than constitutional labels

The applicants invoked property rights in relation to loss of light, privacy, noise, visual impact and overbearing development. The court held that the inspector had addressed the substance of those interests.

A planning assessment does not become unlawful merely because it omits the words “constitutional rights” or “ECHR rights”. Conversely, simply using those labels would not replace substantive consideration. The judgment’s emphasis is on what was actually assessed.

4.5 The missing comparison with the former boundary

The central reasoning appears at paragraphs 91–100. The inspector acknowledged removal of the eastern boundary, resulting changes to the applicants’ surroundings, difficulties involving farm animals entering their garden, and the absence of agreement on replacement planting. The court treated the inspector’s account as the relevant premise without resolving the developer’s contrary factual position.

Condition 2 was adequate as a general screening requirement. Its deficiency arose from treating the situation substantially as though a new boundary were being introduced where none had previously existed.

The required assessment was comparative: would the new treatment fully rectify the removal by producing an outcome wholly comparable to the former party boundary? The inspector did not address that question, and the condition did not secure such an outcome.

Neither preparation by a suitably qualified person nor later agreement with the local authority answered the substantive omission. Expertise and subsequent approval could help implement a restorative standard, but did not supply a standard absent from the decision itself.

4.6 Property disputes and planning consequences are not identical

The inspector noted that landownership disputes belonged before the courts and referred to section 34(13) of the Planning and Development Act 2000. That provision preserves the distinction between planning permission and a legal entitlement to carry out development.

The High Court did not require the commission to determine title or adjudicate trespass. It required the commission to address the planning consequences of the boundary removal on the factual basis its inspector had accepted. Referring private-law questions elsewhere did not resolve that separate issue.

4.7 Full restoration is not an inflexible rule in every case

The judgment recognises that full rectification might be impossible or inappropriate. A weighty, objective planning justification could support a different treatment; the court illustrated this with a boundary obstructing wildlife movement.

No such justification arose here. Accordingly, the decision should be understood as requiring proper consideration and an adequately secured restorative outcome on these facts—not automatic historical reconstruction regardless of planning circumstances.

5. Precedents Cited and Their Influence

5.1 The central authorities on previous illegality

Duffy v An Coimisiún Pleanála [2026] IEHC 322

This was the principal doctrinal foundation. At paragraph 87(iv), quoted in the present judgment, Humphreys J. distinguished a mere allegation of unauthorised development from a decision-maker’s conclusion that previous development was actually unauthorised.

An allegation alone does not require an open-ended investigation. Where illegality is established, however, new permission should not simply facilitate or perpetuate it. Appropriate responses may include full rectification, retention permission addressing the illegality, or a compensating measure where complete rectification is impossible or inappropriate.

The present case applies the restrictive side of that approach. On the inspector’s accepted account, a general replacement-boundary condition did not sufficiently address the consequences of the earlier removal. The court considered that allowing substantial uncertainty about comparable restoration perpetuated the problem.

Hession v An Coimisiún Pleanála [2026] IEHC 355

The court relied on paragraph 110 for the proposition that unauthorised developments do not preclude permission where the permitted development is neither dependent on nor facilitative of them. Together with Duffy v An Coimisiún Pleanála, this shows that the governing inquiry concerns the relationship between the new permission and the earlier illegality, rather than the mere existence of wrongdoing somewhere in the development’s history.

Murphy v. An Bord Pleanála [2009] IEHC 38

This authority appeared within the passage quoted from Duffy v An Coimisiún Pleanála. That passage cautioned against treating a particularly permissive authority as the sole governing standard. Its significance here is contextual: the court adopted a synthesis allowing ordinary planning administration to proceed while retaining meaningful limits where permission would perpetuate an identified illegality.

Doorly v. Corrigan [2022] IECA 6

This case was cited illustratively when assessing the commission’s reliance on a suitably qualified person. Humphreys J. referred to unacceptable arrangements endorsed by an ostensibly qualified person in that litigation. The citation supported the limited point that professional involvement does not, without more, guarantee a substantively adequate outcome. It was not the source of the planning-law test.

Meath County Council v Murray [2018] 1 IR 189

This authority appeared in the parties’ submissions reproduced in the judgment. The commission relied on McKechnie J.’s description of the enforcement provisions’ policy aspiration: legislative compliance enabling orderly development in a regulated and coherent manner.

The applicants disputed the commission’s use of that proposition, arguing that proper planning could not excuse unauthorised building or interference with another’s land. The present judgment did not independently develop the authority into a separate test. Its relevance is to the distinction between securing planning compliance and treating retention as punishment or reward.

5.2 Constitutional interests

In re MacCionnaith [2026] NIKB 55

The court cited paragraphs 33–35 in support of examining substance rather than terminology. The inspector’s consideration of privacy, light and residential amenity was not invalid merely because it lacked an express constitutional or Convention-rights label. This authority therefore supported rejection of the applicants’ separate constitutional ground.

5.3 Litigants in person and the limits of procedural latitude

The judgment drew on several authorities to explain how the court could read the applicants’ pleadings fairly without constructing a different case for them:

• C.O'S. & Anor v. Doyle & Others [2013] IESC 60 supported allowing some latitude to avoid disadvantage arising from lack of legal knowledge.
• Talbot v. Hermitage Golf Club [2014] IESC 57, paragraph 48, was cited for the same general approach to unrepresented litigants.
• Flynn v. Desmond [2015] IECA 34, paragraph 19, formed part of that supporting line of authority.
• Kelly v. An Bord Pleanála & National Transport Agency [2024] IEHC 364, paragraph 65, supplied a planning-litigation reference for those principles.
• Croghan v. Collins [2024] IEHC 607, paragraph 9, was also cited within that line of authority.
• O'Doherty and Waters v. Minister for Health [2022] IESC 32 supplied the essential limit: some latitude is permissible, but not “radical surgery” to the case actually advanced.
• McGreal v. Minister for Housing, Local Government and Heritage (II) [2024] IEHC 690, paragraphs 31–37, was cited for further discussion of those limits.

The practical result was balanced. Failure to isolate formally labelled core grounds was not fatal, and the boundary complaint was recognisable within ground 15. But latitude did not admit the unpleaded EIA complaint, cure every vague allegation, or alter the applicable legal tests.

The court also referred to Delany and McGrath on Civil Procedure, fifth edition, paragraph 31-140, as a supporting procedural text.

5.4 Draft judgments, fairness and confidentiality

A substantial procedural section explained the draft-judgment process under Practice Direction HC 137. The following authorities concerned that process, not the substantive validity of retention permission:

• O'Sullivan v. Health Service Executive [2023] IESC 11 supported the warning that procedural fairness does not create an entitlement to elaborate procedures at every stage.
• O'Sullivan v. Sea Fisheries Protection Authority [2017] IESC 75 supported rejection of the assumption that only procedures resembling a criminal trial can be fair.
• Attorney General v. Crosland (No. 2) [2021] UKSC 58 was cited for the administration-of-justice reasons supporting restrictions on publication of draft judgments.
• Baigent v. Random House Group Ltd [2006] EWHC 1131 (Ch) was cited as further authority relevant to draft-judgment confidentiality.
• R. (Counsel General for Wales) v. Secretary of State for Business, Energy and Industrial Strategy [2022] EWCA Civ 181 likewise appeared among the supporting confidentiality authorities.
• Public Institution for Social Security v. Banque Pictet & Cie SA and others [2022] EWCA Civ 368 provided further support in that procedural context.
• Itkin v. Wood [2023] JRC 101 completed the cited group of confidentiality authorities.

The judgment did not separately analyse the facts or individual holdings of the latter authorities. Their collective function was to support confidentiality and disciplined engagement with a draft, rather than reopening argument on the merits.

6. Pleading, Participation and Fair Procedures

The commission argued that the applicants’ case contained narrative grievances rather than properly formulated legal pleas. The court accepted that criticism only in part. Several grounds did articulate legal complaints, notwithstanding imperfect organisation.

The judgment also draws useful distinctions about participation in the administrative process:

• A complaint arising from the decision-making process itself need not invariably have been anticipated and raised beforehand.
• Failure to use the expression “constitutional rights” does not prevent a later argument where the underlying interests were raised.
• An important planning document might potentially require consideration despite not being expressly invoked by a participant, although that possibility did not assist with the exemption guidance here.
• A procedural challenge concerning a newly adopted climate plan required identification of something material the applicants would have said. No relevant difference or lost submission was demonstrated.

The developer’s response to the draft judgment also illustrates the limits of that procedure. His disagreement with the applicants’ account did not turn the draft stage into a factual trial. The court clarified the restricted basis of its reasoning instead.

7. Potential Impact

For planning authorities and inspectors

The judgment encourages a clear separation between ordinary mitigation and restoration of an identified loss. If removal of an existing boundary is accepted and materially affects neighbours, an assessment should explain how the proposed treatment compares with what was removed.

Generic planting specifications, professional preparation and later approval may be insufficient if they leave the essential restorative objective unresolved. Where comparable restoration is inappropriate, the decision should identify the objective planning justification for another outcome.

For developers

Retention remains available despite an enforcement history. However, an application may be vulnerable where its conditions leave an accepted earlier interference effectively unaddressed. Addressing the previous boundary and the proposed replacement expressly may be more important than simply proposing an otherwise acceptable landscaping scheme.

For objectors

The applicants succeeded by identifying a specific unanswered issue, not by establishing a general entitlement to prevent neighbouring agricultural development. The judgment demonstrates the value of a focused challenge linking an accepted factual premise to a concrete defect in the assessment or conditions.

Limits on the precedent

This is a High Court decision expressly tied to its facts. It does not impose a general investigative obligation whenever illegality is alleged, convert exemption distances into mandatory permission standards, or establish the developer’s civil liability. Its significance lies in applying an existing principle against perpetuating illegality to an inadequately addressed party-boundary removal.

8. Complex Concepts Simplified

Retention permission

Planning permission sought retrospectively for development already carried out. Its grant does not itself settle ownership disputes or private claims.

Certiorari

A court order quashing an unlawful public decision. Here, it removed the retention permission rather than substituting the court’s preferred planning scheme.

Exempted development

Development that can proceed without an ordinary permission application if specified requirements are met. Losing exemption does not necessarily mean permission must be refused.

Merits versus legality

Merits concern whether a planning choice is desirable. Legality concerns whether the authority acted within its powers and properly addressed what the law required.

Party boundary

The shared boundary between adjoining properties, including the hedge at issue here. The court did not determine its precise ownership or the parties’ civil liabilities.

Comparable rectification

Remedying removal by securing an outcome comparable to the previous boundary, rather than merely providing some acceptable new screening.

Section 34(13)

The statutory distinction between planning permission and entitlement to carry out development: permission does not override another person’s property rights.

Obiter observations

Judicial comments extending beyond what was necessary to decide the case, including the wider warnings about repeated retention applications delaying enforcement.

9. Conclusion

The judgment combines substantial restraint towards planning expertise with a focused requirement of restorative accountability. Most objections failed because they concerned planning weight, misunderstood exemption rules or lacked a sufficiently demonstrated legal basis.

The successful point was different: having accepted a materially harmful boundary removal, the planning assessment did not address whether its condition would fully rectify that loss through comparable replacement. A generally satisfactory future boundary was not enough to answer that question.

The central lesson is therefore narrow but important: planning conditions must address the actual problem disclosed by the accepted facts, rather than solve a different, purely prospective one.