For homeowners in Louth, routine locksmith work such as repairing, replacing, or upgrading existing locks generally does not require planning permission from Louth County Council. This type of work is considered essential home maintenance and security enhancement, not a major structural alteration. Therefore, you typically won't need to consult planning authorities for standard lock changes or repairs.
Regarding grants, Louth County Council offers Housing Adaptation Grants and Housing Aid for Older People, designed for essential repairs, home adaptations, or mobility aids. These grants are not typically available for general security upgrades like installing new locks, unless directly part of an approved accessibility modification or a larger renovation to a derelict property. Always check your home insurance policy for specific security requirements.