Planning Permission in Ireland: A Complete Guide for Homeowners (2025)
Whether you’re planning an extension, a new build, or a change of use, understanding planning permission in Ireland is essential before you start any development work. This guide explains when you need planning permission, how to apply, and what to do if your application is refused or objected to.
Do You Need Planning Permission?
Not all development requires planning permission in Ireland. Under the Planning and Development Regulations, certain works are “exempted development” and can proceed without permission. Common exempted works for homeowners include:
- Extensions to the rear of a house up to 40 square metres (with conditions), subject to existing use requirements
- Porches of limited size
- Solar panels on roofs or in gardens (subject to conditions)
- Garden sheds and outbuildings within size limits
- Internal alterations that do not affect the external appearance
- Certain types of fencing and garden walls
Exemption conditions are complex and must be checked carefully. Works that would otherwise be exempt lose their exemption if they would contravene an existing planning condition or materially affect a protected structure. Always confirm exemption status before proceeding.
When You Do Need Permission: The Application Process
- Pre-application consultation: Many local authorities offer pre-planning consultation with their planning department — useful for assessing the prospects of your application before incurring architect fees
- Prepare your application: A planning application typically includes drawings (site location map, site layout plan, floor plans, elevations), a planning report, and the application fee
- Submit to the planning authority: Applications are submitted to your local authority (county council or city council). The application is publicly available for inspection and comment
- Public notification: You must place a site notice on the property and publish a notice in a local newspaper
- Decision period: The planning authority has 8 weeks to make a decision (extendable in certain circumstances)
- Decision: The authority will grant permission (with or without conditions), refuse permission, or request further information
Third-Party Objections
Any member of the public can lodge a formal objection to your planning application during the observation period (typically 5 weeks from the date of application). Objections are considered by the planning authority in making their decision but do not automatically lead to refusal.
Appealing a Planning Decision
If your application is refused, or you receive conditions you believe are too onerous, you can appeal to An Bord Pleanála within 4 weeks of the planning authority’s decision. Third parties who made submissions during the application process can also appeal a grant of permission.
Protected Structures
If your property is a protected structure or in an architectural conservation area, stricter rules apply. Works that would not require permission for an ordinary house may require planning permission for a protected structure.
Why Planning Compliance Matters for Property Transactions
When selling a property in Ireland, your solicitor will check that all structures on the property have the benefit of planning permission and that all planning conditions have been complied with. Unresolved planning issues — including extensions built without permission — can delay or prevent a sale. Our conveyancing solicitors routinely identify and advise on planning compliance issues.
Have planning or property queries? Book a 30-minute consultation with one of our property solicitors. For property purchases, see our Clever Conveyance service and our complete guide to buying a house in Ireland.
This article is for informational purposes only and does not constitute legal advice.
