Give a Houseguest a Temporary Smart-Lock Code
Create a unique, time-limited houseguest code, keep resident credentials private, and verify that access ends after checkout.
Give a short-term guest a unique smart-lock code that activates shortly before arrival and expires shortly after departure. Never share a resident’s code or the lock owner’s password. One host should create the code, test its time window, tell the household when access begins and ends, and confirm that the code is disabled after checkout.
Set the access window before sending the code
Start with the visit, not the technology. The host records the guest’s first name or a neutral label, arrival window, departure deadline, doors they may use, and whether they may enter when the host is away. Housemates should approve the visit under the existing guest policy before any access is created.
Set activation near the expected arrival rather than at the moment the invitation is accepted. Add a modest arrival buffer if travel is unpredictable. Set expiration after the agreed departure time, with only enough margin for collecting luggage. A weekend visitor does not need a code that works for the rest of the month.
NIST’s IoT device cybersecurity catalog for logical access describes capabilities such as limiting privileges and creating temporary accounts or roles. A household smart lock is simpler than an organizational system, but the principle translates well: grant only the access needed, for only as long as it is needed.
Keep resident and administrator credentials private
A guest code should open the approved door. It should not allow the guest to add users, view access history, change settings, or unlock unrelated areas. If the lock cannot separate those permissions, do not give the guest app access. Use a temporary keypad code, meet the guest at the door, or provide a physical key under a written return plan.
Never paste the master PIN into a group message. Send the temporary code directly to the guest, preferably without the full street address in the same message. Ask the guest not to forward it. If a second visitor needs independent entry, create a second code so either credential can be revoked without disrupting the other.
The lock administrator should use a unique account password and multifactor authentication when the vendor supports it. Keep firmware and the controlling phone app current. Access records can also reveal when people arrive and leave, so decide who may review them and why. HomeCo’s guide to common-area camera consent and privacy offers a related model for limiting household security data.
Run a checkout closeout
Expiration is the primary control, but verify it. After the departure window:
1. Check that the guest is out and has collected belongings.
2. Confirm the temporary code shows as expired or deleted.
3. Test it from outside while another resident remains inside with working access.
4. Check for any unexpected user, schedule, or setting change.
5. Close the visit record.
Do not keep a guest code active “just in case.” If the guest forgot something, arrange a new collection time and create a new short window. Reusing an old code makes the audit trail unclear and may give access at a time the household did not approve.
If the guest leaves early after conflict, disable the code immediately once they are safely outside and have their possessions. Tell the household that access ended. Do not use the access log to monitor ordinary movements or embarrass the guest. Review it only for lock management, a reported access problem, or a safety concern covered by the household policy.
How HomeCo Helps
Create a guest-access checklist in HomeCo with separate fields for household approval, activation, expiration, and closeout. Assign the host as the owner and set the closeout task for the departure deadline. Housemates can see the access window without seeing the code itself.
Record “code disabled and tested” rather than the digits. The code belongs in the lock system or a direct message to the guest, not in a permanent shared household archive. If departure changes, update both the guest event and the lock schedule so the calendar does not imply access that the lock still permits.
Frequently asked questions
How long should a guest-code buffer be?
Use the smallest buffer that fits the visit. Travel uncertainty may justify activation shortly before arrival and expiration shortly after checkout. Discuss a larger buffer with housemates instead of silently extending access overnight.
What if the smart lock cannot schedule expiration?
Set a HomeCo task for manual deletion at checkout and assign a backup resident. If nobody can reliably remove the code, meet the guest at the door or use a physical key with a documented return.
Should housemates receive the guest’s code?
Usually no. Residents should retain their own credentials. They need the guest’s access window and the host’s contact information, not an extra copy of a temporary secret.