For standard House Alarm Services in Mayo, you generally do not need specific planning permission. Minor external alterations or additions, such as alarm boxes, are typically considered exempted development. However, for any significant structural changes, especially on listed buildings or within protected areas, it is always wise to consult Mayo County Council's planning department for clarity.
Regarding grants, the Sustainable Energy Authority of Ireland (SEAI) offers various schemes, but these are primarily for energy efficiency upgrades like insulation or renewable heating systems, not directly for house alarm installations. Your primary focus for compliance should be ensuring your chosen professional is licensed by the Private Security Authority (PSA) to national standards, which can also often lead to discounts on your home insurance.