Exempted Development Rules in Ireland
For most Irish homeowners, the good news is that a pergola or a retractable awning often falls under the category of “exempted development.” This means you typically do not need formal planning permission, provided the structure meets specific criteria set out by the Planning and Development Regulations. Generally, the pergola must be located to the rear of your house and must not exceed certain height limits—usually 3 metres for a flat roof or 4 metres for a pitched roof.
Key Requirements for Your Garden
To keep your project exempt, you must ensure that the total area of all structures in your garden (including the new pergola, existing sheds, or greenhouses) does not exceed 25 square metres in total. Additionally, you are required to leave at least 25 square metres of “private open space” remaining in your garden. It is also important that the structure is used for a purpose “ancillary to the enjoyment of the dwelling,” meaning it shouldn’t be used as a separate living space or for commercial business.
When to Consult Your Local Authority
While the majority of standard installations are straightforward, there are exceptions. If your home is a protected structure, located in a conservation area, or if you plan to build the pergola in your front garden, you will likely need to apply for permission. If you are ever in doubt, it is a wise move to apply for a “Section 5 Declaration” from your local council. This provides a formal written confirmation that your project is exempt, giving you total peace of mind before the first timber is cut.