The hard part of short-term letting in 2026 is not any single rule — it is that the rules are set per commune, change often, and stack: registration, night cap, changement d'usage, DPE floor, SIRET, micro-BIC bracket, taxe de séjour, copropriété, insurance. Miss one and the others don't save you.
This is exactly what the Rent — Lease & Short-Term app and its web companion were rebuilt around. For short-term hosts it registers stays, generates per-stay guest invoices and taxe-de-séjour records, surfaces each property's micro-BIC classification (50% classé vs 30% non-classé) and flags the 120/90-night cap before you cross it.
And before any of that, you can run AdminLanding's free compliance check — no account needed, in English or French. It scores a property against its obligations in one glance: DPE letting-ban status, mandatory diagnostics, SIRET/LMNP, short-term registration and taxe de séjour, with email reminders before each deadline. Start there, confirm the commune-specific points (registration, night cap, changement d'usage) with your mairie, and let the app keep the file current. None of it replaces your mairie, your insurer or an accountant — it removes the friction of knowing what applies and proving you did it.