Question 1

Someone got into my mailbox — is that just a lost key issue or a bigger security problem?

Accepted Answer

Mailbox theft in NYC is more serious than most people realize. Mail theft is a federal crime, but more importantly, your mailbox contains a steady stream of sensitive documents: bank statements, credit card offers (which can be used to open accounts in your name), government correspondence, prescription medications, and checks. A compromised mailbox is often the first step in identity theft. If you believe someone accessed your mailbox without authorization, report it to USPS Postal Inspection Service (1-877-876-2455) and replace the lock immediately.

Question 2

What is the difference between a USPS cluster box and a building mailbox that you can replace?

Accepted Answer

USPS Cluster Box Units (CBUs) — the standard blue or grey metal cluster mailboxes common in newer construction — are USPS property. The USPS controls the master door lock; individual tenant compartment issues go through USPS directly. Building mailbox banks — the older lobby-mounted wooden or metal rows common in Brooklyn apartment buildings — are building property. The individual cam locks in these mailboxes are the building owner's responsibility and can be replaced by a locksmith. Call your super to confirm which type you have.

Question 3

Can you replace just one mailbox lock in a building, or does the whole bank need to be done?

Accepted Answer

We can replace a single mailbox cam lock — no need to touch the other units. We carry a range of standard cam lock sizes (typically 3/4" and 7/8" face diameters are most common in Brooklyn building mailboxes). We open the lock with a pick or extraction tool, remove the cam lock, and install a matching replacement with new keys. Time: under 15 minutes for a single replacement.

Question 4

As a landlord, when should I replace all mailbox locks?

Accepted Answer

Every time a tenant turns over. Former tenants have their key and may have made copies. Mailbox lock replacement should be part of your standard unit turnover checklist — along with apartment lock rekeying. We offer building-rate pricing for landlords doing multiple units in a single visit. Call for volume quotes.

Question 5

How much does mailbox lock replacement cost in Brooklyn?

Accepted Answer

A single mailbox cam lock replacement is $45–$75 including the new lock and two keys. We charge a service call fee for a single lock but waive it when bundled with apartment rekeying or any other lock work in the same visit. Building-wide replacements (5+ units) start at $35 per lock. Call for a quote based on your unit count.

Mailbox Lock Replacement in Brooklyn, NY — Lost Key & Building-Wide Rekey

Why Your Mailbox Lock Matters More Than You Think

For Brooklyn Landlords & Building Managers

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