

Change or rekey · Toronto
Mailbox Lock Replacement
Someone tried to pry the little door on the mailbox open with a screwdriver, and though the mail sitting inside is untouched, the lock now sits crooked in its hole and the key barely catches when it is turned.
In plain words
In a condo or apartment building, a single failing compartment often turns into several once a property manager starts asking around, and this service scales either way. One lock can be swapped on its own for a single resident, or a run of compartments can be measured and replaced together during one visit while the building's superintendent confirms which units are involved. Either way, only the named compartments change hands, and every neighbouring door stays as it was.
How the visit goesThe mail slot on the shop's exterior wall has a small compartment lock that a former employee still has a key to, months after they left. Nobody on staff can say with any confidence who else might hold a copy.
Mailbox Lock Replacement
How the visit goes


Measuring the cylinder
The cylinder is measured from the face that sits flush with the compartment door to the back of the housing, and that length has to match the thickness of the material it passes through. Diameter matters just as much, since the hole already cut in the door will not change to fit a lock that is slightly too wide or too narrow. A tape measure and the old lock, still in hand, settle both numbers before a replacement is chosen, which is what keeps a swap to a single short visit.
Taking out the old lock
With the compartment door open, the old lock is usually removed from the inside: a retaining nut is unscrewed with a small wrench or nut driver, or a spring clip is pressed free, and the whole cylinder and cam lift out as one piece. When the compartment cannot be opened this way because the key is lost, snapped, or simply unknown, picking or decoding is tried first, and the lock is drilled only when that is not practical, aimed precisely at the wafers so the plug turns and the housing releases without damaging the door around it. Either route ends the same way, with an open hole ready for the matched replacement.
A compartment that closes the way it should
Where a bent door or a loose hinge was part of the original problem, the compartment now closes flush and the new lock turns without the key catching partway. Give the door a firm close and a turn of the key once more before walking away, checking that the latch seats fully rather than resting on the edge of catching, which is the same small movement that let the old lock's wear go unnoticed for so long.
Mailbox Lock Replacement
In the van
Wafer tumbler pick set
Replacement compartment hinge
Straight and offset cams
Penetrating lubricant
Manufacturer-approved cylinder lubricant

Mailbox Lock Replacement
What affects the quote
Number of compartments involved
A single household's mailbox is the simplest visit. A property manager asking for several compartments changed together, or a family bringing more than one door onto matching keys, naturally makes for a longer job with more hardware.
Coordination with a property manager
A job arranged through a building's manager or superintendent, covering compartments across several units, takes coordination and record-keeping beyond what a single household's mailbox involves.
Number of keys cut
Two keys is the usual starting point. Extra copies for other household members, or for several residents on a shared panel job, are counted individually into the visit.
What to have ready
- Is this a residential mailbox or a business mail slot?
- Has the compartment door been bent, pried at, or damaged recently?
- Is the current key lost, snapped, broken, or simply worn out?
Mailbox Lock Replacement: questions
QuestionsMy mailbox is in a condo or apartment lobby panel. Who authorizes the work?
For a single resident's compartment, proof tying that person to the unit is usually enough. For a run of compartments changed together, the property manager or superintendent coordinates the visit and confirms which units are involved, and each compartment is still checked against a resident or the building's own records before its lock is touched.
How many keys do I get when the lock is changed?
Two keys is standard, cut from blanks matched to the new lock and tested in the door before the visit ends. Additional keys for another household member, or for someone who collects mail while you travel, are cut on the spot if you ask, rather than needing a separate stop at a hardware store afterward.
Will you drill my mailbox lock, and does that damage the compartment?
Drilling is kept as a last resort, used only when the lock is seized, the key is gone, or an earlier attempt has already damaged the mechanism, and it is explained before it starts. The drill is aimed precisely at the lock itself, so the compartment door around it is left alone, and a new lock is fitted during the same visit so the compartment is never left standing open.
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