Policies & Legal

What is a Registration Number?

Updated 2026-05-28

A registration number, also known as a license or permit number, is a unique code assigned to a vacation rental property by a local governing body. It serves as official proof that the property has met the necessary legal and safety requirements to operate as a short-term rental in that jurisdiction.

Many cities and regions mandate that this number be prominently displayed on all listing sites like Airbnb, Vrbo, and a host's direct booking website.

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How it works

To obtain a registration number, a property owner or manager must typically submit an application to the relevant local authority, such as a city planning department or tourism board. This process often involves providing documentation like proof of ownership, liability insurance, floor plans, and evidence of safety compliance (e.g., fire extinguishers, smoke detectors).

Once the application is reviewed and approved, the authority issues the unique registration number. The host is then responsible for adding this number to their property listings across all distribution channels as required by law.

Why it matters

A registration number is crucial for legal compliance, as operating without one in a regulated area can lead to substantial fines, delisting from OTAs, and potential legal action. For local governments, these numbers are a key tool for tracking the short-term rental market, ensuring properties adhere to safety standards, and collecting applicable occupancy taxes.

Displaying a valid number also adds a layer of trust and legitimacy for guests, assuring them that the property is a lawful and regulated business. Managing this requirement across multiple platforms is a key operational task, which property management software like Lodgify helps centralize.

Examples

  • A host in Lisbon obtains their 'Alojamento Local' registration number and adds it to their Airbnb and Booking.com listings to comply with Portuguese regulations.
  • A property manager in San Diego is fined because one of their managed rentals was advertised online without displaying its required Short-Term Residential Occupancy (STRO) license number.
  • Before booking a stay in Barcelona, a traveler confirms that the apartment listing includes a valid tourism registry number, which gives them confidence in the property's legality.
  • A new host in a resort town discovers they must first apply for and receive a short-term rental permit number from the county before they can legally accept any bookings.

Frequently asked questions

Where do I get a registration number for my vacation rental?+
You must obtain a registration number from the specific municipal, county, or regional government body responsible for regulating short-term rentals in your property's location. Check your local city or county government's website for an office of STR permits or a planning department.
Does my registration number need to be on my listings?+
Yes, in most jurisdictions that require registration, it is mandatory to display the number on all advertisements, including listings on OTAs like Vrbo and your own direct booking site.
What happens if I operate without a required registration number?+
Operating a short-term rental without a mandatory registration number can result in serious consequences, including large daily fines, removal of your listings from booking platforms, and legal orders to cease rental operations.
Is a registration number different from a business license?+
It can be. In some municipalities, the short-term rental registration is a specific type of business license. In others, you may be required to obtain a general business license in addition to a separate short-term rental permit or registration number.
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