How to Register Your Airbnb in Lombardy (Como): CIN, CIR, Rules & Requirements

If you are planning to host on Airbnb or other short-term rental platforms in Lombardy (for example in Lake Como), understanding CIR and CIN is essential. These codes reflect important regulatory changes recently introduced by the Italian government — and they impact what you need to do to host legally. This guide explains what they are, why they matter, the steps to obtain them, your ongoing obligations, and how to stay fully compliant.

✅ What are CIR and CIN?

CIR — Codice Identificativo Regionale

• The CIR is a regional identification code specific to Lombardy. It is issued when you register your property for short-term or holiday rental (locazioni turistiche / “LT” or holiday homes — “case vacanza”). Comune di Milano+1

• As of the Lombardy regional law (LR 25/01/2018, n. 7, and subsequent regulations), every unit intended for short-term rental must be registered via the regional tourism portal Ross1000, which issues the CIR code. Comune di Milano+1

• The code is unique for each property: it is a combination of the ISTAT code of the municipality, letters identifying the type of accommodation, and a sequential identifier. Comune di Milano

• Since 1 November 2018, the CIR must be included in all advertisements and communications about the property — both online and offline. Failure to display it can result in fines ranging from €500 to €2,500 per listing. Comune di Milano+1

CIN — Codice Identificativo Nazionale

• The CIN is a national identification code, recently introduced by the Italian government for all short-term rentals and tourist accommodations. It is intended to create a unified national registry. Studio Vitali+2Euroconference News+2

• The new requirement was introduced by Decree-Law 145/2023 (converted into Law 191/2023) — specifically art. 13-ter. Studio Vitali+1

• The national database used for this is the BDSR (Banca Dati Strutture Ricettive), managed by the Ministry of Tourism. -+2Euroconference News+2

• The portal became operative in late 2024; the deadline for property owners to obtain a CIN was set for 1 January 2025. -+2Euroconference News+2

• Once obtained, the CIN must be displayed on all online and offline listings (e.g., Airbnb, Booking, personal websites), as well as on any marketing material. vrbo+2Euroconference News+2

• In regions like Lombardy, where a regional code (CIR) exists, you may need to show both CIR and CIN. vrbo+1

Together, CIR and CIN ensure that your property is registered both at regional and national levels — a crucial step to legally operate as a short-term rental.

🛠️ How to Register: Step-by-Step (for Lombardy / Como)

Here is the typical workflow to register a property in Lombardy for short-term rental (e.g., Airbnb), get your codes, and comply with the law:

1. Prepare your property / ensure compliance

   • Make sure the property meets habitability, safety, hygiene, and building code requirements appropriate for residential use. For short-term rentals, properties must be suitable as residential dwellings. Comune di Milano+1

   • If the property uses gas, you may need gas detectors or carbon monoxide detectors. Fire extinguishers may also be required under newer safety regulations tied to the CIN regime. Adigrat Real Estate+2Lawzana+2

2. Submit a “Start of Activity” Declaration (SCIA / CIA) to SUAP

   • In Lombardy (and many other Italian regions), before offering a property for short-term rental you must file a SCIA (Segnalazione Certificata di Inizio Attività) or CIA through the municipal SUAP (Sportello Unico per le Attività Produttive). Comune di Milano+1

   • This filing includes cadastral data, property address, owner data, and declaration that the unit meets safety and hygiene standards. Comune di Milano+2regione.lombardia.it+2

3. Obtain the CIR (Regional Code)

   • After submitting SCIA, the request is reviewed by the SUAP and forwarded to regional authorities (e.g., the province). Once approved and accredited, you'll receive access credentials to Ross1000 and your unique CIR. Comune di Milano+2regione.lombardia.it+2

   • The CIR is then valid for that specific property — each unit/apartment needs its own. Comune di Milano

4. Register on the National Platform to get your CIN

   • Go to the BDSR portal of the Ministry of Tourism: bdsr.ministeroturismo.gov.it and log in using SPID or CIE (electronic ID) of the property owner / legal representative. Euroconference News+2regione.lombardia.it+2

   • Fill in the required information: property address, cadastral details, rental type, safety declarations, etc. If your property already has a CIR, the BDSR may import much of that data automatically. regione.lombardia.it+1

   • Once complete, the system assigns a unique CIN for your property. Euroconference News+1

   • In regions with a CIR, you may be required to display both codes. vrbo+1

5. Publish your listing (Airbnb, etc.) including both CIR and CIN

   • On all advertising channels — Airbnb, Booking, a website, printed materials — you must include your registration codes. Omission can lead to fines or delisting. vrbo+2Comune di Milano+2

     
     

📝 Ongoing Obligations & Compliance After Registration

Once your property is registered and listed, there are ongoing tasks you must fulfill to stay compliant:

• Guest registration with the police (Alloggiati Web):For all guests (EU or non-EU), you must transmit their identity data (ID/passport number, nationality, dates of stay, etc.) to the local police headquarters via the Alloggiati Web portal, generally within 24 hours of arrival. For stays under 24 hours, sometimes within 6 hours. S&P Law Firm in Italy+2vrbo+2

• Monthly tourist flow reporting: In Lombardy, owners/managers must report the monthly “flusso turistico” (tourist flow) — number of guests, nights stayed, etc. — through the regional portal (or equivalent), e.g., flussituristici.servizirl.it or Ross1000. Failing to report or underreporting may result in administrative fines. vrbo+1

• Maintain safety and habitability standards: Any required safety devices (gas/CO detectors, fire extinguishers, compliance of heating/electrical systems) must remain in working order. Adigrat Real Estate+2Lawzana+2

• Tax compliance: Rental income must be declared properly. Many hosts choose the “cedolare secca” (flat-rate tax) if eligible. Note: from 2024–2025, the tax rules for multiple properties and platform withholding have become more stringent. Adigrat Real Estate+2Lawzana+2

• Public display of codes: The CIR and CIN must be visible on all ads, websites, and — if required — on signage outside the property. vrbo+2vrbo+2

Failure to comply with any of these obligations can lead to significant fines, removal of listings, and other enforcement measures. Estatefy+2vrbo+2

📍 What This Means for Como / Lake Como (Lombardy)

• The same regional rules apply in all of Lombardy — including the CIR + SCIA via SUAP + Ross1000 registration. So, if you have a property in Como and want to rent it short-term, you must follow the steps above.

• Because the national law now requires a CIN, even longstanding hosts must ensure they have registered in the BDSR and added the CIN (and CIR) to all their listings.

• As Lake Como is a highly touristic area, authorities tend to be strict. Correct registration and reporting help you avoid inspections, fines, or forced de-listing.

  
  

🎯 Why This Matters (for Hosts and Guests)

• For hosts:

  • It legitimizes your property as a legal, recognized accommodation.

  • It helps avoid heavy fines (for example: up to €8,000 for failing to obtain or display the CIN) and ensures listing platforms (Airbnb, Booking, etc.) don’t remove your listing. Adigrat Real Estate+2Lawzana+2

  • It gives you access to a national registry, better data management, and potentially easier compliance with regional and municipal rules.

  • It improves credibility for guests, building trust and demonstrating professionalism.

• For guests:

  • A listing that clearly shows both CIR and CIN is a sign that the property is registered and compliant with safety and legal requirements.

  • It helps ensure that the accommodation meets basic standards (safety, hygiene) and is tracked properly by authorities.

  • It reduces the risk of unexpected legal issues (e.g., being evicted, forced to leave, or paying fines for the host — which sometimes get passed to guests).

    
    

✅ Summary – Quick “Host Checklist” for Lombardy / Como (2025)

Step	Action
1	Ensure property meets residential standards (safety, hygiene, building regs)
2	Submit SCIA (start-of-activity) to your local SUAP via Impresainungiorno.gov.it
3	Once approved, log into Ross1000 → get CIR
4	Log into BDSR portal → get CIN (using SPID/CIE)
5	Add CIR and CIN to ALL ads, listing pages, signage, marketing
6	On guest arrival: register them on Alloggiati Web (within 24 hours)
7	Each month: submit tourist flow data via Ross1000 / regional portal
8	Maintain ongoing safety / habitability compliance (detectors, extinguishers, etc.)
9	Declare income correctly (e.g., cedolare secca) and pay local taxes / tourist tax if required

⭐ Need Help Getting Started? — We Offer Full Setup Service

If it seems like a lot — don’t worry. Setting everything up properly can be complex, but it’s absolutely doable. If you need help setting up your Airbnb — from SCIA filing to obtaining CIR and CIN, to listing creation and full compliance — we offer a full setup service. We guide you through every step, handle paperwork and registration, and make sure you meet all regional and national requirements.

We’ll make the process smooth, fast, and compliant — so you can start hosting with confidence.