Lost Key
Lost key in Brussels: opening if needed, risk assessment and cylinder replacement depending on the model. Confirm availability by phone. Availability, arrival time are confirmed by phone; non-destructive methods are preferred when the mechanism allows.
GoogleLost Key in Brussels or Brabant? Janssens is available 24/7; arrival time are confirmed by phone. Non-destructive methods are preferred when the mechanism allows - 0495 205 400.
Verification before every door opening
We only open a door after checking your identity and right of access. Have an ID and proof of residence, tenancy agreement or the owner's permission ready. If those are not immediately available, we agree another verification method. If access cannot be verified, we do not open.
Fast intervention
Arrival subject to availability confirmed by phone
The technician closest to your location is dispatched as a priority. No call center: you speak directly to the locksmith who will handle your job.
Method adapted to the lock
Bypass, lock picking, decoding: our technicians master all three non-destructive opening methods. Cylinder drilling is only used as a last resort, with your prior approval.
Available 24/7
24/7 availability, confirmed by phone according to the situation.
Direct contact
After examining the mechanism, we explain the method and necessary work before you agree.
Lost Key right now?
Don't stay locked out! Call us, we arrive subject to availability confirmed by phone.
GoogleHow does it work?
1. You call us
Briefly describe your situation. We give you a precise arrival time. Mention the cylinder brand and door type if you know them - it speeds up preparation.
2. We arrive quickly
Our locksmith arrives with the necessary equipment and contacts you before arrival to confirm the exact address.
Assessment and agreement
After examining the mechanism, we explain the method and necessary work before you agree.
4. Problem solved
The technician completes the accepted work and tests the result with you.
Our commitments
Describe the problem so our team can arrange the intervention. Prepare for a locksmith visit.
Emergency? Give your address and describe the problem when you call to confirm availability and arrival time. Read our guidance by emergency type and check our service areas across Belgium.
Frequently asked questions
Should I change my lock if I lost my keys?
Can you open my door if I lost all my keys?
How do I get a quote for lock replacement after losing keys?
Can I have new keys made instead of changing the lock?
Lost keys: regain access and assess the remaining risk
Missing keys raise two separate questions: how to get inside, and whether the old key should still work. A spare held by someone you trust can solve the first problem without addressing the second.
Before requesting a door opening
Check your belongings and contact the places you last visited. For keys lost on the STIB-MIVB network, follow the official lost-property guidance. Check current practical details before visiting the office.
If no spare is available, explain whether the door is just latched or locked. The opening method depends on this and on the mechanism’s condition. The proposed work and its consequences are explained before you agree.
When should the cylinder be changed?
Report suspected theft, address details lost with the keys and every entrance the keyring opens. A compatible replacement cylinder gives that entrance a different set of keys. The whole lock does not automatically need replacing; suitability and parts availability must be checked.
Report a missing access badge to the building manager too. Replacing an apartment cylinder does not deactivate a badge or keys to shared entrances. Each access point needs a separate assessment.
Prepare for the visit and future spares
Provide the address, door type and any visible cylinder reference. Availability, arrival estimate, parts and cost are confirmed for your situation. If you intend to contact an insurer, check its terms directly and retain the invoice.
Once the entrance is secured, see our key duplication service for a suitable spare. Copying the old key does not disable the missing one.