Environmental Impact Assessments (EIA) screening rules are open for review, homebuilders nationwide need to speak up

 

Here’s what’s changing, why it matters for delivery, and how to make a submission that lands.

 

 

For more than twenty years, the rules that decide which housing and urban development projects must be screened for Environmental Impact Assessment (EIA) have sat largely untouched in Part 2 of Schedule 5 of the Planning and Development Regulations 2001. They were written for a different decade, before the housing crisis reached its current pitch and before Ireland prioritised the need to build at scale while delivering net gains for nature. The Department of Housing, Local Government and Heritage is now reviewing them, and it is asking the industry to weigh in.

 

The public consultation on EIA screening thresholds is open until 5pm on 30 June 2026. Any interested party can make a submission: https://www.gov.ie/en/department-of-housing-local-government-and-heritage/consultations/public-consultation-environmental-impact-assessments-screening-thresholds/ 

 

For anyone delivering homes and infrastructure on the ground, this is not a box-ticking exercise to be left to the legal and planning consultancies. It is a rare opportunity to tell the people drafting the next set of regulations what the current system actually does to a project between the decision to acquire a site and the day the first home is occupied.

 

Why this consultation matters more than most

Screening is the step that determines whether a development project needs a full Environmental Impact Assessment, needs to be formally screened for one, or can proceed without either. Critically, under the EIA Directive, member states are allowed to set both inclusion thresholds (above which assessment is mandatory) and exclusion thresholds (below which neither assessment nor formal screening is required). Ireland is among the member states that have set inclusion thresholds without ever introducing exclusion thresholds, meaning every sub-threshold project has had to undergo formal screening regardless of scale. Another delivery hurdle. In specific categories the Irish thresholds also sit well below the Directive’s own mandatory levels – wastewater treatment being the clearest example, where Ireland’s 10,000 p.e. trigger is roughly 93% lower than the EU’s 150,000 p.e. figure.

 

*Section 225 of the Planning and Development Act 2024 gives the Minister the power to set both kinds of threshold for the first time. 

 

The Department is proposing what it calls a ‘traffic light’ approach, commonly used by other Member States: a green light for projects small enough or remote enough from sensitive areas that they are presumed not to need assessment, an amber light for those that should be screened, and a red light for those that clearly require a full EIA. The consultation focuses on three categories in particular – construction of dwelling units, urban development, and wastewater treatment plants – though submissions on other categories are welcome, and encouraged.

 

The intent is to remove formal screening from the majority of small-scale housing and urban projects that would, in practice, screen out anyway. It is worth being precise about one point the Department itself stresses: a project that falls below an exclusion threshold will still have to undergo an examination of its nature and location to confirm it does not nevertheless have the potential for significant environmental effects. The exclusion threshold removes a procedural step; it does not remove the underlying obligation to protect the environment. That distinction is the heart of the whole exercise, and it is exactly the kind of nuance that practitioners are well placed to comment on.

 

The problem builders already know

Anyone who has shepherded a residential scheme through the Irish planning system in recent years can describe the pattern. Documentation expands to manage legal risk rather than to inform a decision. The volume of material a developer submits, and a planning authority must review, grows year on year (how are digital submissions working out for you..?)

 

The environmental impact statement for the Dublin city centre Luas extension in 2005 ran to a few hundred pages, while the assessment for a more recent extension ran into the thousands, with a non-technical summary alone longer than the entire original statement.

 

The underlying driver is well understood. When the consequence of any defect in an assessment – however minor, and however immaterial to the actual environmental outcome – can be the quashing of permission for an entire scheme, the rational response is to assess everything, exhaustively, and to keep assessing. Caution is not irrational on the part of any individual applicant. It is the system that produces the outcome. 

 

There is also a deeper structural issue that exclusion thresholds only begin to address. Many of the questions an individual developer is currently asked to answer are not questions a single applicant can sensibly resolve: the cumulative effect of all development across a region, the fate of a migratory species across its whole range, the interaction with other plans and projects entirely outside the applicant’s control. These are strategic questions. They are best settled at the level of the regional or national plan, where they can be answered once and properly, rather than re-litigated at the level of every project. 

 

The cluster of housing schemes around Dublin held up over uncertainty about the Light-bellied Brent Geese – birds that range across a network of feeding grounds no single site controls – is the clearest local example of what happens when a strategic question is pushed down to the project level with no plan to catch it.

Exclusion thresholds will not fix the strategic-versus-project mismatch on their own. But a well-designed traffic light system, paired with mapped environmental sensitivity zones, is a meaningful step toward resolving these questions where they belong: in the plan, not in the planning application.

 

This is not a choice between building and nature

It is worth being direct about the framing, because the consultation will attract submissions that treat any change as a weakening of protection. That framing is unhelpful, and homebuilders are well placed to demonstrate why.

 

The objective is a more reasonable, realistic and appropriate allocation of scrutiny, not less scrutiny. Proportionate screening means the regulatory effort lands on the projects where it can actually change an environmental outcome, rather than being spread thinly and expensively across thousands of low-risk schemes where it changes nothing. The Department’s own guiding principles for assessing submissions make this very clear: proposals must allow for the appropriate deployment of resources, not the avoidance of scrutiny; they must support proper planning and sustainable development; and they must remain compliant with the EIA Directive.

 

The wider policy direction reinforces the point. Following the Supreme Court’s February 2026 judgment in Coolglass Wind Farm Limited v An Coimisiún Pleanála, climate considerations are now an enforceable legal requirement that public bodies must substantively address in their decisions. The court was careful to say this does not create an automatic presumption in favour of any particular project, however, it does mean the planning system is increasingly expected to reconcile delivery with environmental and climate goals rather than trade one off against the other. A screening regime that wastes effort on minor cases is no help to that reconciliation. A regime that concentrates effort where it matters – and that pairs development with genuine, strategically planned biodiversity gain delivered where it does the most ecological good rather than wherever a red line happens to fall on a site map – serves both objectives at once.

 

The most credible and impactful submissions will be the ones that address both (1) where has the current system imposed cost and delay without protecting anything, and (2) where has it genuinely caught a risk that mattered? Honest answers to both questions are more useful to the Department than advocacy or outright lobbying in either direction.

 

What the Department is actually asking

The consultation poses a focused set of questions, including: 

1. Whether respondents support the introduction of exclusion thresholds and a traffic light system in principle
2. Whether they support exclusion thresholds for dwelling units, and if sO, 
3. Where the threshold should sit: 
   1. the same for urban development, including whether thresholds should vary by location (business district, built-up area, or elsewhere)
   2. whether the inclusion threshold for wastewater treatment plants should be amended and an exclusion threshold added; and
   3. Whether any other project categories in Schedule 5, Part 2 would benefit from exclusion thresholds.

 

On wastewater specifically, there is a concrete anomaly worth flagging. The EU-wide mandatory threshold for EIA applies to plants serving a population equivalent above 150,000. The threshold currently set in Ireland is 10,000 population equivalent – roughly 93% lower than the Directive’s figure. The Department is proposing to bring the Irish inclusion threshold into line with the Directive. Anyone who has dealt with the servicing constraints that hold up housing delivery will recognise the relevance of getting wastewater infrastructure moving.

 

*Just keep in mind the recent moves for developer-led wastewater treatment in schemes of 40 homes or fewer have just been challenged: https://breakingground.news/legal-challenge-launched-against-new-rules-for-developer-led-wastewater-treatment-plants/

 

You and your team do not need to answer every question. A submission can focus on the single category you know best – just make it real. Let us know if you need help putting this submission together.

 

What makes a submission potentially impactful

The Department has set out clear expectations, and they are likely to listen to practitioners with data, over ideology. Submissions should relate to categories of development, using experience. Be careful not to use this to air a grievance about one refused application, as this will carry very little weight. What the Department is looking for is evidence and a clear pattern across many comparable schemes. Proposals must apply uniformly across the State and remain compatible with the Directive. And conclusions should be supported by facts or evidence wherever possible.

 

For homebuilders, that translates into a few concrete suggestions: 

• Bring numbers: the screening time, cost, and consultancy spend on a typical sub-threshold scheme, and how much of it changed any decision 
• Be specific about where you think an exclusion threshold should sit and why, ideally tied to project characteristics the Department can actually write into a regulation – unit counts, site area, location relative to mapped sensitive zones 
• If you are proposing that a threshold vary by location, say how the locations should be defined
• Where you have direct experience of a strategic question being dropped onto a project that could not answer it, describe it plainly 
• And be candid about the cases where screening did its job, because that credibility is what will make the rest of your submission land
• Keep it concise and on point — the Department asks for exactly that — and leave out anything you would not want published.

 

The window is short

Submissions close at 5pm on 30 June 2026. Submissions are made through the consultation portal, which requires registration so progress can be saved and submissions securely recorded: https://www.gov.ie/en/department-of-housing-local-government-and-heritage/consultations/public-consultation-environmental-impact-assessments-screening-thresholds/

 

The supporting materials the Department has published – the current screening thresholds, the EIA Directive, the Commission’s guidance on screening, the traffic lights study, and the thresholds report – are all worth reading before you write.

 

These regulations will set the terms under which the country builds its homes and infrastructure for years to come. They are being written now. The people who know best where the current system helps and where it merely hinders are the people delivering on the ground. If that is you, this is the moment to say so – in your own words, with your own experience, before the end of June.

 

Delivering a housing, infrastructure or regeneration project? Property District supports public and private sector project owners with development communications, public engagement and placemaking strategies that build understanding, trust and support. Contact the team at info@propertydistrict.ie