If you buy a cylinder lock and install them yourself, the average cost is between $15 to $50 for each lock. If you plan to have four standard locks for your home, then that would cost $60 to $200 in all. The cost will be higher if you intend to have separate unique keys activating each cylinder lock in your home.
If you want to do a DIY rekey, the kit at any hardware store falls between $8 to $15 which is good for six locks.
In contrast, if you want a locksmith to come to your house and do re-keying, the cost is around $40 to $100 with an additional cost of $5 to $25 for each cylinder lock. Moreover, the cost greatly depends on the type of lock and the current rates in your location.
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