The most-asked question in Irish planning has a structure most answers skip: exemption is never a single yes — it’s a class, wrapped in conditions, measured against the property’s cumulative history — and breaching one condition doesn’t trim the exemption, it removes it entirely. This page is the honest structure; the Permission Checker walks your project against it in two minutes.
The Wrapping: Conditions, Limits, Cumulative History
The regulations exempt defined classes — the modest rear extension within the floor-area threshold, specified garden structures, porches within limits, defined works and uses, agriculture’s own schedule — and every class arrives wrapped: height limits, area thresholds counted cumulatively with every previous extension (including the one the last owner built), boundary distances, remaining-garden requirements, use restrictions on the resulting space, front-versus-rear distinctions that decide dormers and roof works. The trap is total: works that breach one condition lose the exemption entirely — the whole structure becomes unauthorised development, surfacing in enforcement when a neighbour complains and in conveyancing when you sell. The era’s special case gets its own care: short-term letting can amount to a material change of use requiring permission — principal-residence home-sharing and designated-area rules diverging, the registration era layering compliance on top, the regime still moving — and owners get the position mapped on their actual facts, quietly, before any letter arrives. Farm buildings run their own scheduled exemptions with their own precise traps, handled alongside the wider practice at farmsolicitor.ie.
The Certainty Instrument: Section 5
Where the question has any edge, the law provides the answer-machine: a Section 5 declaration — the planning authority’s formal determination that a matter is or is not development, is or is not exempt, with referral onward to An Coimisiún Pleanála available. Its four best moments: before works, converting “we think it’s exempt” into a determination that ends arguments before they start; before purchase, where a target property’s works history is murky; in enforcement, where works were genuinely exempt all along — the declaration ends the question at its root without conceding any breach, which is exactly why it’s checked before any retention application (retention concedes what Section 5 might have denied); and on sale, closing the requisition a purchaser’s solicitor has raised. The craft is the question: Section 5 answers what it’s asked — a referral framed loosely buys a useless answer, one framed precisely buys certainty — and framing it is solicitor’s work. The unglamorous rule underneath it all: check before cutting — because retro-fitting compliance is always the expensive direction.
Planning Works - or Questioning Works Already Done?
Either way the exemption structure decides it: class, conditions, cumulative history. Send the project or the photographs today; the assessment - and whether Section 5 should nail it down - comes within 48 hours.
Call 01 5827148