Planning guide + eligibility checker
Can your garden use the 32–45m² Class 3A exemption?
Check the combined-area cap, existing Class 3 sheds, open space, ownership, placement, access, services and Building Control steps.
Read the Class 3A guideCurrent position: the Class 3A exemption has been in force since 27 July 2026. It is not a blanket 45m² permission; every planning condition must be satisfied. Tax, tenancy and Building Control rules remain separate.
Separate and family land
Can you put a tiny or modular home on this land?
See why owning a site is not planning permission, how family and agricultural land are assessed, and where Class 3A does and does not apply.
Read the land guideBuilding Control + supplier documents
Make the selected model work in Ireland
Coordinate Irish Building Regulations, notices, design responsibility, certificates and the technical records required from an Irish or imported supplier.
See compliance coordinationUse the free garden planning checker → Book a free 15-minute fit call →
Three rules people often mix together
Planning exemptionWhether the physical development can proceed without a planning application under Class 3A.
Building complianceWhether the dwelling and its construction process meet Building Regulations and Building Control requirements.
Tax and tenancyHow rent is taxed, whether a tenancy must be registered and what occupation is permitted.
Reviewed 6 August 2026. These pages provide general information, not a site-specific planning determination, legal advice or individual tax advice. Use the linked official sources and obtain professional or local-authority confirmation where facts are uncertain.