A hotel room is a known quantity. Standard door, standard bed, a lift, a corridor, a number on the door. A private address is standardised in no way at all, and in Amsterdam it is less standardised than in most places.
That is not a problem. It is a different set of five details.
The address line
Dutch addresses carry a suffix, and the suffix does most of the work. "hs" is the ground floor, the huis. "1", "2" and "3" are the floors above it. "sous" is the half-basement that sits below street level, reached by the steps going down rather than up. A canal house number on its own can mean any of them.
Send the suffix. A four-storey building on a narrow street can hold five separate front doors, and the difference between them is one character at the end of a line.
The buzzer, and what it says
Send what is actually printed beside the button, even if it is a stranger's surname. If the panel has no names at all, count from the top and say so: second button down, third from the bottom. If the bell reaches the hallway but not the top floor, which is common in older canal houses, say that too and watch the street at the arrival time.
Keypads, gate codes and courtyard gates all belong in the same message. A hofje with a closed gate at midnight is not an obstacle if the code arrives with the address. It is a ten-minute problem if it arrives afterwards.
What the flat itself needs
Nothing. Everything used in a session arrives in the bag. No preparation is expected and no shopping list exists. Warmth and enough floor space beside the bed cover it, and most flats already have both. That question comes up often enough that it has its own post: what your room needs.
The price does not move
An apartment costs what a hotel room costs. Every length on the ladder is billed identically at both. There is no travel charge inside the ring, which means a third-floor flat in Oud-Zuid and a room off Dam Square are the same number in the rates table on every therapist profile. Distance inside Amsterdam is not a billable quantity. It is forty to sixty minutes either way.
Payment works the same as anywhere else. Half of a first booking goes through the thread once the booking is confirmed; the rest is settled on arrival in euro cash, by card or in crypto.
Residential buildings are quieter than hotels
This is the one real difference, and it runs in your favour more often than not. A hotel corridor at 01:00 has staff in it. A residential stairwell has nobody.
The arrival is a single person carrying a single bag in ordinary clothes. There is no uniform, no branding and nothing on the bag. In a building with shared stairs that matters more than it does in a lobby, and it is handled the same way every time, whether the address is a canal house or a new block.
Shared halls do carry sound, though. Steep Dutch staircases carry it further. If your neighbour's bedroom shares a wall with your hallway, the sensible fix is the same one that works at any hour: keep the conversation at the door short, and have the door open before the buzzer is needed twice.
Short-lets and other people's flats
A rented flat you are in for four nights is a normal booking. So is a friend's place while they are away, provided you are the one there. What we need is the same in all three cases: the address with its suffix, the name on the buzzer, the floor, and whether there is a lift.
One line with all four in it is usually enough to get a confirmation back.