Managing Keys After a Move, a Split, or a Tenant Turnover

Keys accumulate quietly. Over the life of a tenancy or an ownership period, copies get cut for a dog walker, a cleaner, a contractor, a family member, a neighbor holding a spare. Nobody tracks them because nothing forces the question. A handover, whether a sale, a tenancy ending, or a household changing shape, is the moment the question becomes unavoidable, and the accumulated total is usually larger than anyone guesses.

Start With an Inventory, Not a Locksmith

Write down every lock on the property before making a single call. The list is longer than the front and back door. Work through exterior entry doors, the door between the garage and the house, the garage side door, the overhead door if it has a key release, the mailbox, gates and side yard latches, sheds and outbuildings, a detached studio or office, window locks, a basement or cellar hatch, and any padlocks on utility enclosures.

Note the keyway and whether cylinders already match. That inventory is what turns an open ended job into a quotable one, and it is what prevents the classic outcome where the front door is rekeyed and the shed key still opens the gate.

Think in Terms of Who Plausibly Holds a Copy

Rather than trying to remember every key ever cut, work from the categories of people who plausibly received one. After a home purchase: prior owners, their relatives, prior tenants, agents, cleaners, contractors, and anyone who used a lockbox during the listing period. After a tenancy: the tenant, roommates, the tenant's guests, and any service providers they engaged. In each case the list has real names attached but no reliable count of physical keys, which is exactly why rekeying rather than key collection is the usual answer.

Rental Property Obligations Are Set by State Law

Landlord duties around locks and security devices are statutory and vary by state. California, for example, requires the owner of a building intended for human habitation to install and maintain an operable dead bolt lock on each main swinging entry door of a dwelling unit, to install and maintain operable window security or locking devices for windows designed to be opened, and to install compliant locking mechanisms on exterior common area doors in multifamily buildings, as set out in California Civil Code section 1941.3.

Other states address different points, including notice requirements, who may change locks, and what happens during a tenancy rather than between them. Check your state landlord tenant statute or state housing agency for the rules where the property is, and consult a licensed attorney about a specific tenancy, dispute, or court order.

A Note on Safety Situations

Some handovers happen in the context of a relationship ending under difficult circumstances, and key management is only one small part of a much larger picture that includes legal protections, housing, and personal safety. That planning is best done with people trained to do it. The Office on Women's Health lists the National Domestic Violence Hotline on its page on getting help, reachable at 800-799-SAFE (7233), staffed 24 hours a day, available in more than 170 languages, and free and confidential, with advocates who provide safety planning and connect callers to local shelters and services. If that describes your situation, start there rather than with a hardware decision.

Digital Credentials Need Their Own Pass

Mechanical rekeying does nothing to a smart lock's user list. Handle electronic access as a separate task. Delete every user code and guest code and reissue fresh ones rather than editing the existing set. Remove all paired accounts and revoke any shared access in the manufacturer app. Unpair the lock from any hub, voice assistant, or automation platform the previous occupant configured. Change the manufacturer account password and, where the account itself is being transferred, do a full factory reset and re enroll the device.

Review the access log before you clear anything, since it is the only record of who has been using which credential. Do the same for garage door remotes and keypad codes, video doorbells and camera accounts, alarm panel user codes, and any building intercom or fob system managed by a property manager.

A Move In Week Checklist

• Walk the property and complete the written lock inventory.
• Rekey or replace exterior cylinders, keying alike within the main dwelling.
• Handle outbuildings, gates, and the mailbox in the same pass.
• Purge and reissue all electronic codes and paired accounts.
• Reprogram garage remotes and keypad codes.
• Record how many keys were issued and to whom, and keep that list current.