Quick Answer: In December 2025, new planning exemptions farm sheds Ireland, the Irish Government signed new regulations that significantly increased planning exemptions for farm buildings. Farmers can now build animal housing up to 300 m² (up from 200 m²) and have an increased total aggregate exemption of 450 m² (up from 300 m²) — a 50% increase in both limits. For the first time, there’s also a stand-alone slurry storage exemption allowing up to 1,000 m³ per structure, with a farm-wide limit of 1,500 m³. These changes came into effect in late 2025 and apply now — not in the future. Separate housing-related planning changes (modular homes, granny flats) were announced in April 2026 but are still proposed, not yet law.

If you’ve been hearing about new planning permission changes on the radio or in the news, here’s the honest breakdown. There are actually two separate sets of changes happening, and they affect different people in different ways.

For farmers building or extending sheds, the most important changes already happened in December 2025 — they’re law, not proposals. For homeowners thinking about modular homes or garden cabins, separate changes were announced in April 2026 but aren’t yet in force. We get asked about both at Sullivan Steel, so this guide covers the key facts on both — but it leads on the farm story because that’s where most of our clients are affected.

[Image suggestion: insert a Sullivan Steel completed agricultural project. Alt text: “New 2026 planning exemptions farm sheds Ireland — Sullivan Steel completed agricultural building, Co. Wexford”]

The December 2025 Farm Building Planning Changes — New planning exemptions farm sheds Ireland Now in Force

On 18 December 2025, Minister of State for Planning and Local Government John Cummins signed new regulations that amend the Planning and Development (Exempted Development) Regulations 2001. This means the changes are already law — they’re not waiting on further approval.

The main changes for farmers:

Animal Housing Exemption Increased by 50%

• Before: Up to 200 m² for animal housing without planning permission
• Now: Up to 300 m² per individual building

That’s a 50% increase. For most farmers, this means a typical five-bay slatted shed with a creep and overhang on a feed passage could now qualify for exemption where previously it might not have.

Total Aggregate Limit Also Increased

• Before: Total of 300 m² cumulative across the holding (4-year rolling period)
• Now: Total of 450 m² cumulative

This matters because exemptions are cumulative — meaning the total amount of exempted building you can do across your holding in any 4-year period. The 50% increase here gives farmers significantly more headroom to plan multiple builds.

Brand New: Stand-Alone Slurry Storage Exemption

This is genuinely a first. Until now, stand-alone slurry storage required planning permission. Under the new regulations:

• Per structure: Up to 1,000 cubic metres of slurry, effluent or soiled water storage
• Farm-wide limit: 1,500 cubic metres total exempted storage

This is a major change. For farmers dealing with Nitrates Directive compliance and stocking density requirements, the ability to add slurry storage without planning permission removes a real bottleneck.

Conditions That Still Apply, Farm shed exemption ireland

These exemptions aren’t unconditional. The following rules still apply to any farm building built under the new exemptions:

• At least 10 metres from any public road
• At least 100 metres from any neighbouring house (or other habitable building)
• Maximum 8 metres in height within 100m of a public road
• All building regulations still apply — exemption from planning doesn’t mean exemption from structural standards
• Environmental protections still apply — if your land is in a Special Area of Conservation (SAC), Special Protection Area (SPA), or close to a watercourse, you may still need permission
• All relevant agricultural standards must be met — including Nitrates Directive and animal welfare requirements
• No effluent storage within 10 metres of any public road or 100 metres of any house

If your build crosses any of these limits, planning permission is still required.

P lanning permission changes Ireland farmers, Why These Changes Matter for Irish Farmers

The new exemptions remove three real bottlenecks farmers have faced for years:

1. Planning permission delays. Standard agricultural planning applications take 8–12 weeks at minimum, often longer with submissions or appeals. The new exemptions skip that entirely for qualifying builds.

2. Planning application costs. Architect drawings, application fees, engineer’s certificates — the application process itself can cost €3,000–€8,000 before any building work starts. Exempt developments avoid most of this.

3. Slurry storage compliance. With Nitrates Directive requirements tightening and the recent renewal of Ireland’s Nitrates Derogation, many farmers need additional slurry storage urgently. The new exemption lets them add it without the planning timeline.

For Sullivan Steel clients planning new farm buildings or expanding existing yards, these changes mean significantly faster project timelines — assuming the build fits the exemption rules.

[Image suggestion: insert a Sullivan Steel slurry storage or animal housing project. Alt text: “Agricultural planning permission changes Ireland 2026 — Sullivan Steel completed farm shed and slurry storage”]

How This Works With TAMS 3 Grant Applications

Both changes work alongside the TAMS 3 grant scheme, but the relationship needs care:

• Planning and TAMS are separate processes. Just because your build is exempt from planning doesn’t mean TAMS approval is automatic — you still need to apply through agfood.ie and wait for written approval before starting work.
• Section 5 declaration may still be useful. Even for exempted developments, getting a formal Section 5 declaration from your local authority confirming the exemption applies provides legal certainty for your TAMS application and for any future property transactions.
• TAMS reference costs aren’t changed by the planning exemption. Grant rates and ceilings remain the same regardless of whether your build needs planning or not.

If you’re going through TAMS 3 with the new shed roof replacement grant or any other TAMS scheme, talk to your agricultural adviser about how the new planning exemptions interact with your specific application.

The April 2026 Housing Changes — Still Proposed

Separately to the farm changes, the Government announced proposed changes to planning exemptions for housing on 21 April 2026. These are different — they’re not law yet — and they affect homeowners more than farmers.

The main proposed housing changes:

• House extensions — exemption increased from 40 m² to 45 m²
• Garden cabins and modular homes — proposed exemption up to ~45 m² behind a dwelling
• Granny flats and auxiliary dwellings — streamlined process
• Dormer windows — easier process
• Attic conversions — easier process
• Front-garden sheds — exemption rules eased
• Heat pumps — installation anywhere on property without planning permission
• External wall insulation — exempt from planning permission

These are being introduced as part of the Planning and Development Act 2024 reforms, with the goal of expanding what homeowners can do without planning permission. However — and this is important — these housing changes are still proposed. The existing rules apply until the new regulations are formally signed into law later in 2026.

If you’re a homeowner thinking about a garden cabin, granny flat or modular home, the smart move is to wait for the final regulations or talk to a planning consultant before committing.

What This Means If You’re Planning a Farm Build, Farm shed exemption Ireland

A few practical things to think about if you’re planning a farm shed, slurry storage or animal housing under the new exemptions:

1. Check your exact requirements first. The new exemptions are generous but conditional. A build that’s 305 m² isn’t exempt — only 300 m² is. Get the exact dimensions right at quote stage.

2. Get a Section 5 declaration anyway. Even for an exempted build, a formal Section 5 declaration from your local authority confirms in writing that your specific project qualifies. Costs little, provides certainty.

3. Plan for the cumulative limit. Remember the 450 m² aggregate limit across your holding over 4 years. If you’re planning multiple builds, sequence them carefully.

4. Consider slurry storage now. With Nitrates Directive requirements tightening, the new 1,000 m³ slurry storage exemption is a major opportunity for farms needing extra capacity. Worth thinking about strategically rather than waiting until it becomes urgent.

5. The building regulations still apply. Exemption from planning doesn’t mean you can build to a lower standard. Structural certification, fire safety where relevant, and proper construction standards all still apply.

For more on what to expect from a steel shed build under the new exemptions, see our guide to building a steel shed on your farm in Ireland.

How Sullivan Steel Can Help with Farm shed exemption Ireland

We work with farmers across Ireland on agricultural builds, including:

• Animal housing within the new 300 m² exemption
• Slurry storage tanks within the new 1,000 m³ exemption
• Cumulative build planning across multiple structures
• TAMS 3 grant applications including the new shed roof replacement grant
• Section 5 declarations and planning coordination where needed

We’re set up to quote against the new exemption limits and the TAMS 3 reference costs as standard. If you’re not sure how the new rules apply to your specific situation, get in touch with us — we’ll come out to the site, talk through your plans, and give you an honest quote with realistic timelines. (new planning exemptions farm sheds ireland, agricultural planning permission ireland 2026, farm shed exemption ireland, slurry storage planning exemption, planning permission changes ireland farmers)

FAQ

Q: When did the new farm shed exemption Ireland come into force in Ireland? The new agricultural planning exemptions were signed into law on 18 December 2025 by Minister John Cummins. They are in force now — not waiting on further approval.

Q: What’s the new size limit for farm sheds without planning permission? Animal housing up to 300 m² per building (up from 200 m²), and a cumulative limit of 450 m² across the holding over any 4-year period (up from 300 m²). Slurry storage up to 1,000 m³ per structure, with a 1,500 m³ farm-wide limit.

Q: Do I still need planning permission for a slurry tank in Ireland? For stand-alone slurry storage up to 1,000 m³ per structure (1,500 m³ farm total), no — provided you meet all the other conditions (10m from public roads, 100m from neighbouring houses, not in environmentally sensitive areas, building regulations met).

Q: Are the new garden cabin and modular home exemptions law yet? No. The housing-related changes (modular homes, granny flats, extension increases to 45 m²) were announced in April 2026 but are still proposed. They’re not in force until the final regulations are signed into law later in 2026. The existing rules apply in the meantime.

Q: Do the new planning exemptions affect TAMS 3 grant eligibility? No — TAMS 3 grant rates, ceilings and application requirements are unchanged. You still need TAMS approval before starting work, regardless of planning status. The new planning exemptions and TAMS 3 are separate processes.

Q: What conditions still apply to exempted farm buildings? The build must be at least 10m from any public road, at least 100m from any neighbouring house, within 8m height limit near roads, meet all building regulations, not be in a Special Area of Conservation or near a watercourse, and meet all agricultural and environmental standards.

The Bottom Line

The December 2025 farm building planning exemptions are genuinely significant — they remove a real bottleneck for Irish farmers planning agricultural buildings, animal housing or slurry storage. For most working farms, the new 300 m² animal housing exemption and the brand-new 1,000 m³ slurry storage exemption open up faster, cheaper project options than ever before.

The separate housing changes (garden cabins, modular homes) are still proposed and not yet law — don’t rush into anything based on those until the final regulations are signed.

If you’re planning a farm build and want to know how the new exemptions apply to your specific project, get in touch with Sullivan Steel. We’ll walk through the rules, the exemption limits, and what’s possible for your site.