Situations
A tenancy removes most of this catalogue. What remains is genuinely useful: a clamped window bar, a peephole camera in the existing hole, a shelf camera, a door alarm and a hanging key safe. All five come away on the last day and leave the property as it was.
Renting removes the wall, the door and the frame from what you may change. What is left is more than it looks.
A telescopic bar clamped into the reveal transfers force into the masonry rather than into a frame, needs no fixings, and is deliberately visible from outside — which is where deterrence works.
A peephole camera uses the hole that is already there. A retrofit smart lock turns the existing thumbturn. Neither alters anything permanently, and both come away on the last day.
A camera on a shelf and a contact alarm on a door that should stay shut. No fixings, no permission needed, no making good.
What your own data protection authority says about filming a shared corridor. A flat door faces a space other households use, and the rules are not the same as for a garden.
The frame and the cylinder. Those are the landlord’s, and a polite request is the only route.
Retrofit · fingerprint, app and Bluetooth · magnetic auto-lock · 6 cells · no drilling
A retrofit lock that mounts over an existing cylinder with no drilling and no cylinder change. Signstek states fingerprint, app and Bluetooth access, magnetic auto-locking, and six batteries; the existing key still works from outside.
Best for: A first smart lock, and particularly a rented flat where nothing may be altered.
≈ 130 €
A retrofit one, usually — it mounts over the existing thumbturn, changes no cylinder and drills nothing. Ask anyway: the tenancy is the authority. And be clear that it changes convenience and control, not how hard the door is to force.
It clamps into the reveal rather than screwing to the frame, so nothing is drilled. It depends entirely on the reveal being solid masonry — press it hard with a thumb before relying on it, because a dry-lined return will not hold.
Cameras, alarm kits and safes swing by thirty euros or more across the year, and the biggest "discounts" often land at prices the same model sold for six weeks earlier. UniverTrack tracks the real price history across retailers, spots fake reductions, and alerts you when it is genuinely the moment to buy.
