Broken Key Extraction in Madison, WI

Where keys snap in Madison

A key usually breaks where it is turned most often or with the most force. In Madison, a few places stand out:

• Shared entry and mailbox locks. Census Bureau survey figures for 2024 put 31.3 percent of Madison homes in buildings of 20 or more units. In a building that size, many residents turn the same front-door cylinder daily, and mailbox locks are small and easy to over-twist. A snapped key blocks the door or box for more than one household.
• Multi-family buildings in Third Lake Ridge. The largest of the city's five local historic districts takes in the oldest section of the Marquette neighborhood, and early multi-family buildings stand among its cottages and mansions. Where a lock has been in use for decades, worn pins and a key copied from a copy both make a break more likely.
• Frozen locks. On a bitter winter morning, a key forced against ice in a front door or car door is under far more strain than it was made for.

What not to do

• Don't push the broken half back in, or try a spare key in the same lock.
• Don't put glue on the broken piece; it can bond it to the pins.
• Don't dig at it with any tool; pushing the piece deeper makes extraction harder.
• Don't pour hot water into a frozen lock; it can turn back to ice.
• In a car, don't keep trying the door or ignition once a piece is stuck inside.

Shared buildings

If the key broke in a building entry or mailbox lock, tell the property manager too: the owner may need to approve the work, and other residents need to know the door is out of use.

What to send

• which lock: building entry, unit door, mailbox, car door or ignition
• a photo of the keyway showing whether any of the key is sticking out
• the broken-off half, kept safe, and any brand name stamped on the key
• whether the lock still turns

If the piece comes out but the lock is damaged, lock repair may be the next step. The broken key extraction page covers the service; the Madison page covers the neighborhoods.