Gráinne Ryan

The intent is clear: remove the barriers that have historically slowed housing, water, energy and transport projects, and do it without waiting for events to force the pace.

That same month, a very different signal arrived from the courts. Shorten v An Coimisiún Pleanála [2026] IEHC 517 concerned the Environmental Impact Assessment (EIA) associated with 19 houses in a small Wicklow village, the kind of development that would once have previously proceeded with barely a second thought on environmental grounds.

The High Court’s questions about the housing scheme, whether the state’s environmental assessment shortcuts hold up, and what data a decision-maker must actually engage with, raise exactly the kind of uncertainty the reform agenda is trying to remove. Progressing through the system quickly and getting the environmental assessment right are not the same thing, and developers who treat them as one risk finding out the difference only when a permission is challenged – which may be too late.

That conversation around this has sharpened further with news that the Government is reportedly preparing to remove the requirement for EIAs altogether for housing developments of up to 250 units, along with the infrastructure that serves them such as wastewater treatment plants and overhead cables. The stated aim, reportedly set by Minister of State at the Department of Housing with responsibility for Planning John Cummins, is to speed up delivery and cut costs.

Arriving at the same moment as Shorten, a case built on doubts about a far lighter-touch exemption, it raises the obvious question of whether removing screening altogether would reduce legal risk, or simply delay it to the point a permission is challenged?

What the Court actually said

Most of the applicant’s grounds in this case were dismissed or withdrawn, on pleading grounds and on the High Court’s now well-established discretion not to quash a permission over defects that caused no real prejudice. But two questions survived, and neither has been finally decided.

The first asks whether a competent authority must take reasonable steps to seek out and rely on the most current, comprehensive monitoring data available, rather than whatever happens to be on file, once a credible doubt has been raised. Here, that meant an Environmental Protection Agency (EPA) inspector’s report and status data from 2011 and 2020, weighed against newer figures from Inland Fisheries Ireland and the planning authority’s own environmental scientist pointing to pollutant exceedances downstream of the proposed development.

The second question asks whether Ireland’s ‘preliminary examination’ mechanism, the route that lets many sub-threshold housing schemes skip formal EIA screening altogether, is compatible with the EIA Directive at all. The Court has invited the EPA, Uisce Éireann, Inland Fisheries Ireland and Wicklow County Council to weigh in as the case continues, a strong signal that it sees these questions as bigger than one scheme in Wicklow.

Neither point is settled law yet. But An Coimisiún Pleanála has already started requiring full EIA screening from small residential schemes (five to 19 units) that would never have previously needed it before this judgment. That is the real, present shift: not a change in legislation, but a change in what a decision-maker now expects to see before granting permission, arriving faster than most developers’ processes have caught up with.

A screening requirement that lands after a design is finalised and an application is submitted is a delay. The same requirement, anticipated at the design stage, is a formality. The difference between those two outcomes isn’t the law, it’s when a developer brought in the expertise to work out which one applied.

A blanket exemption raises the stakes, not lowers them

Addressing the recent reports, there appears to be little appetite across the sector for removing the EIA screening process. Screening, done properly, is what makes a permission defensible. Removing the requirement for developments up to 250 units doesn’t remove the underlying environmental risk on a site, it simply removes the documented reasoning a decision-maker would otherwise have relied on if that risk is ever tested in court.

That is the same vulnerability Shorten has already exposed, but in a far narrower exemption. If Ireland’s ‘preliminary examination’ mechanism, which still involves some case-by-case judgement, is under question for compatibility with the EIA Directive, a blanket exemption with no assessment at all is a bigger target, not a smaller one. A scheme built on the assumption that no EIA is required is not necessarily a safer bet than one that was screened and found not to need a full assessment – it may just not have been challenged yet.

Screening or a technical note: knowing which one you need

Not every scheme needs a full EIA screening, and assuming otherwise wastes time and money a smaller developer often can’t spare. Sometimes what’s actually needed is lighter: an EIA technical note, where a consultant reviews a proposed development against the relevant legislation and guidance and determines whether formal screening is required at all.

The value of bringing in that judgement early isn’t that it may result in more work, costs to the project and delays. It’s that it replaces a guess with an answer, before an application is submitted rather than after a planning authority asks the question for you. It also provides the planning authority with a logical reasoning as a reference to enable it to make its decision rather than having to request further information.

How current is current enough?

There’s no fixed rule for how old is too old when it comes to environmental data, and I’d be wary if anyone tells you there definitively is. As a working guide, I’d treat anything over around twelve months as carrying some risk, though it depends heavily on what the data covers.

Ecology or water status information can often still hold at one or two years old if nothing on the ground has changed. In Shorten, using nine-year-old water monitoring data when more recent data appears available is a questionable practice.

Traffic data ages faster, sometimes within months, because a single new development nearby can shift the picture. The mistake developers make usually isn’t ignorance of this. It’s treating environmental conditions as a fixed backdrop rather than what they actually are: a dynamic system that keeps moving whether or not anyone’s watching it.

The cost of finding out too late

That pressure to move quickly isn’t abstract. Glenveagh’s Homebuilding Horizons report, published in August, called on the Government to strengthen the Residential Zoned Land Tax and make an escalating rate the norm, specifically to stop landowners sitting on zoned sites instead of building.

Whatever the eventual policy outcome, the direction of travel is unmistakable, and land is coming under more pressure to be developed - and developed quickly. For the smaller housebuilders that this judgment now affects, that pressure lands directly on projects that have never had to budget time or cost for EIA screening before.

A three-month delay in that context doesn’t just cost three months. It costs three months at whatever materials, labour and finance happen to cost by then, on top of the delay itself, and it lands on developers who are also under growing pressure to build rather than hold.

The Accelerating Infrastructure Plan is right to want barriers to developing housing removed and land moved faster; the mistake would be reading that as licence to treat the environmental case for a scheme as an afterthought. Whether that means a faster judicial review process or, as now proposed, removing EIA screening for developments up to 250 units altogether, the same principle holds: a scheme that hasn’t been screened isn’t a scheme without risk, it’s a scheme where the risk hasn’t been tested yet.

This case is a reminder that speed and defensibility of a development need to be pursued together rather than in sequence. Engaging with environmental experts early doesn’t slow that ambition down and is a vital step in design that shouldn’t be ignored. For developers who get it right, this is what makes the speed hold and ultimately unnecessary costs stay low.

Gráinne Ryan is principal consultant at DNV