Planning permission in Ireland confuses homeowners more than almost any other aspect of renovation, and the consequences of getting it wrong are severe. Building without permission where it is required can result in enforcement action, fines and the obligation to demolish completed work at your own expense. Equally, many homeowners delay perfectly reasonable projects because they assume permission is needed when their work actually falls within exempted development limits. Understanding which category your project falls into is the essential first step before any renovation begins.
What Counts as Exempted Development
Irish planning law allows certain works to proceed without a formal application, provided they meet specific size, height and location conditions. A rear extension of up to 40 square metres on a house, for example, is generally exempt, but only if it does not reduce the rear garden below 25 square metres, does not exceed the original house height and complies with several other criteria. Attic conversions, garden sheds and boundary walls also have exemption thresholds, but each comes with detailed conditions that are easily breached. Check every condition, not just the headline figure, before assuming your project is exempt.
When a Full Application Is Required
Any work that exceeds the exemption limits, changes the use of a building, or significantly alters its external appearance will require a planning application to your local authority. The process involves submitting drawings prepared by an architect or engineer, publishing a notice in a local newspaper, placing a site notice visible from the public road and paying the application fee. The local authority then has eight weeks to make a decision, though requests for additional information can extend this considerably. Neighbouring properties are notified and may submit observations or objections.
The Costs and Timelines You Should Expect
The application fee itself is modest, typically €65 for a house extension, but the professional fees for preparing the drawings and documentation are the real cost. An architect or architectural technologist will charge anywhere from €1,500 to €5,000 depending on the complexity of the project. Add the newspaper notice, site notice and any additional reports the planner may request, such as an ecological assessment or traffic impact study, and the total cost of securing permission for a substantial project can reach several thousand euro before a single block is laid.
Avoiding the Mistakes That Cause Refusals
The most common reasons for refusal are insufficient information, designs that conflict with the local development plan and failure to address the impact on neighbouring properties. Before submitting, study your local authority’s development plan to understand what they will and will not accept in your area. Speak informally with the planning department if possible, as many local authorities offer pre-planning consultation meetings that give you early feedback on your proposal. An application prepared with the development plan in mind and supported by thorough drawings is far more likely to succeed than one assembled hastily and submitted without research.