Lock-related responsibilities are one of the more overlooked parts of being a landlord, and getting them wrong can lead to disputes, liability issues, or even legal trouble. Whether you own a single rental unit or manage multiple properties across the city, here’s what to understand about locks, keys, and tenant security.
Providing a Secure, Functioning Lock Is a Baseline Obligation
New Jersey’s habitability standards generally require rental units to have working locks on all exterior doors as part of providing a safe living space. This isn’t just good practice — it’s typically treated as a basic condition of the unit being rentable at all. If a lock is broken, sticking, or otherwise unreliable, landlords are usually expected to address it promptly once notified.
Rekeying Between Tenants
One of the most important — and most commonly skipped — steps between tenants is rekeying or replacing the locks. Without this, a previous tenant, a former roommate, or anyone who was given a copy over the years could still have working access to the unit. This is both a security risk for the incoming tenant and a potential liability issue for the landlord if something happens as a result. A rekey between tenants is usually fast and inexpensive relative to the risk it eliminates.
Tenant-Installed Locks and Landlord Approval
Tenants sometimes want to install their own additional locks or a smart lock for convenience. Most leases address this directly, either requiring landlord approval or prohibiting hardware changes outright, since unauthorized changes can leave a landlord locked out of their own property in an emergency or during a legitimate access situation, like a maintenance visit or safety inspection. It’s worth spelling this out clearly in the lease rather than leaving it ambiguous.
Emergency Access and Master Keys
Landlords typically retain some form of access for emergencies, repairs, or required inspections, but this needs to be balanced against tenant privacy rights, which generally require reasonable notice except in genuine emergencies. Keeping a master key system organized — and updating it whenever units are rekeyed — helps avoid situations where a landlord can’t get into a unit during an actual emergency because the key on file no longer matches the lock.
Lockouts: Whose Responsibility Is It?
When a tenant locks themselves out, most leases place the cost of that lockout on the tenant rather than the landlord, especially outside of business hours. It’s worth clarifying this in the lease and providing tenants with a reliable emergency locksmith contact upfront, so they’re not left guessing who to call — or accidentally calling an overpriced, unlicensed operator — in the middle of the night.
Security Deposits and Lock-Related Damage
If a tenant damages a lock or loses keys during their tenancy, the cost of repair or rekeying is often deductible from the security deposit, provided it’s documented properly. Keep receipts and clear records of any lock-related work performed, both for your own protection and in case a deposit deduction is ever disputed.
Multi-Unit Buildings and Shared Entry Points
For landlords managing buildings with shared entrances, buzzer systems, or mailrooms, security responsibilities extend beyond individual unit doors. A malfunctioning building entry lock or a buzzer system that lets anyone in regardless of code is a liability that affects every tenant in the building, not just one unit. These shared systems deserve the same maintenance attention as individual unit locks, if not more, given how many people they affect. Larger properties sometimes benefit from an access control system that logs entry and simplifies managing turnover across many tenants at once.
Commercial Leases Have Their Own Considerations
Landlords leasing to businesses face a slightly different set of concerns, often involving master key systems across multiple tenant spaces, higher security grade requirements for certain lease types, and coordination with a commercial locksmith when a tenant’s business changes or a space is being re-leased.
Documenting Everything
Whatever policies you set around locks and keys, documenting them clearly in the lease — and keeping records of every rekey, lock change, or key handoff — protects both landlord and tenant if a dispute ever arises. A simple log noting the date, unit, and reason for any lock-related work takes little time to maintain and can save significant headaches later.
Working With a Locksmith Who Understands Landlord Needs
Not every locksmith is equally familiar with the practical side of rental property management — turnover schedules, master key systems across multiple units, or documentation landlords may need for their own records. A locksmith who regularly works with property managers and landlords tends to move faster through routine rekeys and understands why clear documentation matters for this specific type of work, rather than treating every job as a one-off residential call.
The Bottom Line
Lock management isn’t the most exciting part of running a rental property, but it’s one of the more legally and practically significant ones. Staying ahead of rekeys between tenants, clarifying lease terms around hardware changes, and keeping shared entry points well maintained go a long way toward avoiding disputes and keeping tenants genuinely secure.