If your home is a protected structure, or sits within an Architectural Conservation Area, you should assume that you will need planning permission and that extra care will be required. Homes in these categories lose many of the exemptions that ordinary houses can rely on, so the usual rule that an internal attic conversion needs no permission may not apply to you.
The reason is that these designations exist to protect buildings and areas of special character. Changes that would be routine elsewhere, including some internal alterations and almost anything that affects the roof or external appearance, are looked at much more closely. A dormer that might be exempted development on a standard house can require a full application, and possibly a redesign, on a protected structure or in an ACA.
Because the rules are stricter and the stakes are higher, we strongly recommend engaging with Meath County Council early. A Section 5 declaration can confirm formally whether your specific works are exempt, and for protected structures there may be additional consents to consider. It is far better to establish this at the outset than to risk carrying out unauthorised work on a sensitive building.
We are happy to advise on how these constraints affect your options and what is realistically achievable within them. The best starting point is our planning guide, followed by a conversation about your particular home. Arrange a free assessment and we can talk through the sensible next steps. Whatever route the planning takes, Building Regulations will still apply to the finished conversion.