Getting guests through an apartment building's street door.

Most self check-in products quietly assume one door. A house has one door. An apartment has at least two, and only one of them belongs to you.

The two-door problem

Your guest has to get through the building's street door before they can reach the apartment. That entrance is shared with every other resident, it is controlled by an intercom or fob system chosen by the building, and it is the part of the arrival you have the least ability to change.

So hosts improvise. A fob is left in a lockbox on a fence, or in a cafe down the road. A resident is asked to buzz guests in. A spare is handed to a key desk that charges monthly whether anyone checks in or not. Each of these puts a working key to a shared building into circulation, and none of them can be taken back quickly when a guest walks off with it.

Why you usually cannot just change the entrance

The street door, the intercom and the foyer belong to the building, not to your apartment. Changing them is a decision for whoever manages the building — it can need approval, and door and intercom hardware often sits alongside fire-safety rules as well. Some buildings also restrict short-term letting in the first place.

Working with the entrance instead of replacing it

SmartStay Access opens the street door through the intercom the building already has. Nothing on the shared entrance is swapped out, rewired or re-branded, and other residents keep using the door exactly as they did the day before. From the guest's side it is one tap in a browser; from the building's side, nothing changed.

The apartment door behind it is handled by the same link, so the guest never has to hold two different things for two different doors.

What the building gets out of it

• No fob for a shared entrance sitting in a lockbox on the street, or behind a cafe counter, waiting to be copied.
• Access that ends at checkout on its own, instead of a fob that stays in circulation until somebody notices.
• A record of every entry through the door, with the time and the link used, and of every attempt that failed.
• Nothing altered on the shared entrance, so nothing that needs the building's approval.

What about a building with no intercom?

Then there is only one door to pass, and the same link opens it. The two-door arrangement is the harder case, not the required one — a standalone house or a single front door works the same way, with one tap instead of two.

Find out what your entrance needs

Entrances vary more than apartment doors do. Tell us what is on yours — the brand on the intercom panel is usually enough to start — and we will tell you how it would work on your building.