🔎 Go to the source, not the neighbour. Check with the municipality itself — its website or planning office — not a Facebook group or "everyone around here just does it." Rules differ from one municipality to the next, and "what's enforced" and "what's required" aren't always the same thing. Record where each answer came from so you can back it up later.
⚠️ This organises your research — it isn't legal or tax advice. For anything significant, or if your situation is unusual, get local professional advice.