Yes, you can put solar panels on a shed or garage roof in Ireland, and you almost certainly do not need planning permission to do it. The regulation that exempts rooftop solar names outbuildings directly: it covers panels placed “on a roof of any ancillary buildings within the curtilage of a house”. There is no square-metre limit on a roof-mounted array, on the house or on the shed. The questions worth asking are about the grant, the inverter and the cable.
Planning: exempt, under the same class that exempts your house roof, as long as the panels sit within 15cm of a pitched roof plane (50cm on a flat roof) and 50cm back from the roof edge. Grant: the scheme's conditions are written about your home, which needs an MPRN and a build-and-occupy date before 2025, so get your specific case confirmed in writing by SEAI before works start. Grid: the shed does not get its own allowance, because the limit is measured at the inverter.
The Planning Rule Names Outbuildings
Rooftop solar on Irish homes was opened up by S.I. No. 493 of 2022, which rewrote Class 2(c) of the planning exemptions. The wording is broader than most people expect. It exempts:
“The placing or erection on a roof of a house, or within the curtilage of a house, or on a roof of any ancillary buildings within the curtilage of a house (this class does not include apartments) of a solar photo-voltaic and/or a solar thermal collector installation.”
That is the wording to read against your own site: an ancillary building, inside the curtilage, with the panels on its roof. Where it fits, the roof is covered by the same exemption as the house roof, and that exemption carries no area limit at all. For a specific building, SEAI recommends contacting the planning department of your local authority for guidance.
That last point is where people get tripped up, because a 25 square metre figure does circulate. It is real, but it belongs to a different condition. Here is how the conditions in Class 2(c) land on a shed roof.
| Condition in Class 2(c) | How it applies to a shed or garage roof |
|---|---|
| Panels no more than 50cm above the plane of a flat roof, or 15cm in any other case | Applies. On a pitched shed roof the panels must sit within 15cm of the plane of the roof |
| Minimum 50cm from the edge of the roof | Applies to the roof the panels are mounted on |
| Total aperture area not to exceed 25 square metres | Does not apply to a roof array. This condition is written for free-standing panels, so it governs ground mounts, not roofs |
| Height not to exceed 2.5 metres above ground level | Also free-standing only. It does not cap the height of a shed roof installation |
| Not forward of the front wall of the house | Free-standing only. A garage roof in front of the house is not caught by this condition |
| Panels on any wall are not exempted development | Applies. Mounting on a shed gable or a garage wall needs planning permission, however convenient that wall looks |
| Must not cause hazardous glint or glare | Applies. An installation causing it must be removed or covered until a mitigation plan is agreed with the planning authority |
The two conditions not listed above, on private open space and on architectural conservation areas, are written for free-standing panels as well. So what limits a shed roof array is the geometry: stay flat to the slope, keep half a metre off every edge, and stay off the walls. For the full set of rules across pitched roofs, flat roofs and ground mounts, see our guide to solar panel planning permission in Ireland.
SEAI states that heritage homes, listed buildings and homes in Special Areas of Conservation “will need to contact their Local Authority regarding planning, before proceeding”, and that depending on the exact classification, for example a protected structure, or the location of the property, for example an architectural conservation area, “further requirements may need to be considered”. If any of those describe your property, the exemption is not something to assume, and the planning department of your local authority is the only answer that counts.
Why SEAI's Own Guide Makes This Sound House-Only
If you went looking for this answer in SEAI's homeowner paperwork and came away thinking the shed was out, that is not your mistake. SEAI's Solar PV Scheme Application Guide summarises the planning position like this: “Domestic houses, regardless of location, may now install unlimited solar panels on their rooftops without any requirement for planning permission (subject to certain conditions).” It adds that there is no limit to the area of panels on the rooftops of homes, and that installations can cover the entire roof of a house.
That is SEAI's summary of the position for a house roof. The wording that reaches ancillary buildings is in the statutory instrument. So if a planning query turns on this, the reference you want is Class 2(c) of Part 1 of Schedule 2 to the Planning and Development Regulations 2001, as substituted by S.I. No. 493 of 2022.
Will the SEAI Grant Pay for Panels on the Shed?
Here the honest answer is a qualified one, and anyone offering you a clean yes is guessing.
The Solar Electricity Grant pays €700 per kWp up to 2 kWp, then €200 for every additional kWp up to 4 kWp, capped at €1,800. A battery of 5 kWh or larger adds a flat €600, for a maximum of €2,400. Eligibility runs off the home: it needs an MPRN, it must have been built and occupied before 2025, and it must not have had previous solar PV funding at that MPRN.
What the scheme terms actually say about location is narrow. Clause 8 states that “the Solar PV system is installed in a home that is a private residence”. Clause 9 adds that “only one Solar PV system will be supported at a property”. Clause 32 requires you to “obtain all necessary consents, permissions and statutory approvals and have authority to install the measures”. Clause 27 requires installations to meet the Code of Practice for the scheme, and clause 35 lets SEAI claw back funds over incorrect products as per that Code.
Those are the conditions the scheme actually imposes, and they are about the home, the property and the Code of Practice. The person who signs off compliance is the SEAI registered installer, who declares that the installation meets the scheme requirements. Companies also commit to installing a size-appropriate system for self-consumption as per the Code of Practice, which matters if the attraction of the shed is that it lets you fit far more than the house needs.
Get it confirmed before any works start, and get it in writing. SEAI publishes a technical line for exactly this kind of query on the grant page: 012776977, or solarpv@seaiauditing.ie. Ask specifically whether an array on an ancillary building wired to your home's MPRN is supported under your application, and keep the reply. Clause 15 means the grant is only payable for the measures described in your Grant Offer, so a scope surprise after approval is the expensive version of this conversation.
One structural point is firm, though. Clause 9 supports only one solar PV system at a property, so a house array and a shed array are not two grants on the one home.
The Shed Does Not Get Its Own Grid Allowance
A common hope is that moving panels to the shed sidesteps the microgeneration ceiling. It does not, because ESB Networks measures that ceiling at the inverter rather than at the roof.
ESB Networks measures it this way: “Single-phase systems must have an inverter rated at 25A (approx. 6kVA). Three-phase systems must have an inverter rated at 16A per phase (approx. 11kVA). The inverter limits output to these levels even if additional generation is installed behind it.” Which roof the panels sit on does not enter into it, because the rating that is assessed is the inverter's.
The extra panels themselves are not a problem, though. ESB Networks states that “adding extra PV panels behind an inverter of less than 6kVA Single Phase or 11kVA Three Phase does not require ESB Networks permission”, and explains that the inverter caps output even where there is an over-install behind it “for the purposes of increasing kWh production at times of lower light levels”. The installation is still notified to ESB Networks on the NC6 form.
Pass the inverter limit and the process changes. Beyond 25A single phase or 16A per phase you leave the inform-and-fit route and have to consider mini-generation, which brings a technical assessment and a connection quotation. Inside the limit there is no connection charge, and ESB Networks issues your Maximum Export Capacity within 20 working days of a correct application. Our guide to the maximum solar system size in Ireland works through where that line falls.
Export payment is a separate matter again: a smart meter is required to be paid for what you export, with deemed quantities used for homes not yet eligible in the rollout. See microgeneration and export for how that is paid.
Ask About the Wiring Before You Price the Panels
Planning and the grant are what people ask about. The run between the shed and the house is the part to get into at survey stage.
The standard the work has to meet is not a matter of opinion. The scheme terms require that all electrical work is undertaken by a fully qualified and authorised electrician registered with Safe Electric Ireland, that it complies with the National Rules on Electrical Installation, and that a Safe Electric Ireland Certificate Number 3 evidences that compliance. Clause 25 separately requires the company you hire to be on the SEAI Registered Solar PV Companies list. So two different registrations are in play: Safe Electric for the electrician doing the wiring, and the SEAI list for the company holding your contract. We cover the difference between Safe Electric and SEAI registration on its own page.
Four questions worth putting to the installer on the day they survey:
- How will the shed be wired back to the house, and is there an existing circuit to reuse?
- Does anything need to be dug up, and who makes good afterwards?
- Will the shed roof structure take the panels and the mounting rails as they are?
- Where is the inverter going, and how do I get at it? If one ever starts tripping, you will want to reach it without crossing the garden in the rain.
When the Shed Is Genuinely the Better Roof
On plenty of Irish houses the outbuilding is simply the better roof, for one of five reasons.
- Orientation. If the house roof faces east and west and the shed faces south, the two are worth comparing rather than assuming. Our guide to panel direction in Ireland covers what the difference is worth.
- Shading. A roof clear of the chimney, a dormer or next door's trees is worth putting up against a bigger roof that sits in shadow for part of the day.
- Roof condition and type. Keeping fixings out of an old slate roof, or one due to be stripped in a few years, is a reasonable call on its own.
- Pitch. A near-flat garage roof lets the panels be set at a chosen angle, within the 50cm rule for flat roofs. Our flat roof guide goes through the mounting.
- Space. With no area cap on a roof array, a big shed or a machinery shed can take a system the house roof could not.
If the shed roof does not work out either, a ground mount is the other route, and that is the one where the 25 square metre cap and the 2.5 metre height limit genuinely apply. See ground-mounted solar panels in Ireland.
Tell your home insurer before the installation starts, which SEAI advises too. Our guide to solar panels and home insurance covers what they tend to ask.
Whether the outbuilding is the right roof comes down to its pitch, its structure and the distance back to the house, and that is a survey question rather than a web question. We pass your details to SEAI registered companies only. An installer phones you first to go through the site, and the written quote follows a survey. The form takes about a minute.
Get a Solar Quote →Frequently Asked Questions
Generally no. Class 2(c) of the planning exemptions, as substituted by S.I. No. 493 of 2022, covers solar panels placed on a roof of any ancillary buildings within the curtilage of a house. The conditions that apply to a roof array are that the panels sit no more than 15cm above the plane of a pitched roof or 50cm above a flat roof, stay at least 50cm from the roof edge, and do not cause hazardous glint or glare. SEAI advises that heritage homes, listed buildings and homes in Special Areas of Conservation contact their local authority regarding planning before proceeding, and that a protected structure or an architectural conservation area may bring further requirements, so check with the planning department first.
No. The 25 square metre figure is condition 4 of Class 2(c) and it is written for free-standing panels, which means ground mounts. There is no area cap on a roof-mounted array under that class, whether the roof belongs to the house or to an ancillary building within its curtilage. The 2.5 metre height limit is free-standing only as well.
The scheme terms require that the solar PV system is installed in a home that is a private residence, that only one solar PV system is supported at a property, and that you obtain all necessary consents, permissions and statutory approvals. The home also needs an MPRN and must have been built and occupied before 2025. Because the grant is only payable in respect of the measures identified in your Grant Offer, confirm your specific case with SEAI's technical line on 012776977 or solarpv@seaiauditing.ie before works start, and keep the reply in writing.
It lets you fit more panels, not a bigger connection. ESB Networks assesses the microgeneration limit on the inverter, not the array: a single-phase inverter is rated at 25A (about 6kVA) and a three-phase one at 16A per phase (about 11kVA), and the inverter limits output to those levels even if more generation sits behind it. Extra panels behind an inverter under those ratings need no ESB Networks permission. Going past the inverter limit moves you to mini-generation, with a technical assessment and a connection quotation.
Not as exempted development. Condition 7 of Class 2(c) states that the placing or erection of a solar installation on any wall shall not be exempted development, so a wall or gable mount needs planning permission even though the roof of the same building would not.
Not as a second system on the same home. Clause 9 of the scheme terms supports only one solar PV system at a property, and the microgeneration limit is assessed on the inverter rather than on the array, so splitting panels between two roofs does not create a second allowance. A smart meter is required to be paid for export, with deemed quantities used where a home is not yet eligible for one.
Published: 16 October 2026. Author: Neil Russell. Every claim on this page was checked against the Irish Statute Book, seai.ie and esbnetworks.ie live sources on 16 October 2026.