I re-keyed my existing locks so doors that were updated at different times all worked with the same key. If you already have differently-keyed locks, you could try re-keying them yourself. If you're buying new locks, then the other answers will be more efficient. You can also find them in 10-year-old phone books. Going to their well-worn location assures they're the real deal. So when calling around, if they pressure you to come to you, hang up the phone: that's a fly-by-night with a truck. They cheerfully handle routine requirements at sensible cost (for locksmiths). They are happy for you to come to them, and can make anything since they have a well-equipped shop. Shop-based locksmiths (it need not be neat).They have a truck, not a shop, and their business is the urgent call and collecting that service charge for coming to you. They collect your contact info and sell it to shady 'outbound only' locksmiths who come to you, overcharge you, and/or case your house for a later break-in. They can cheerfully build any lock-set (even a padlock!) to match your key. But the price will be nosebleed compared to the other options. Your friendly neighborhood locksmith can do anything I'm not a fan, honestly the mechanism seems flimsy given the price point. These are compatible with certain keyways. You unlock it, insert a special tool, and then insert the new desired key. But they're cheap.Д¬ertain low-midline brands of lock allow you to 're-key' the lock to any arbitrary key. He could never figure out how I did it! Some brands of locks are self-rekeyable. I noted the model, went to the local hardware store and bought one of each key number. He drilled out ours and fit his own knob-lock. Once we demoted someone in a club and changed the knob/lock to his office. Buy your lock-sets far away, at places you don't normally shop. So if you need 3 knobs + 2 deadbolts, you must buy 3 knob+deadbolt sets, not 2 and a loose knob. Do not turn the store upside down looking for the same key number on a different SKU, you won't find it. This only works within the same SKU (barcode number). (This is the one time I'll recommend big-box they buy whole cartons). If not enough match, see if they have an unopened carton on the racks, or hit another big-box store. Search the packages with the same SKU until you find your matches. Every package in the carton will have the same key number. Generally there are 3-8 lock packages in a carton (all with the same style/color/SKU). So if you have 3 knobs and 2 deadbolts you all want keyed alike, buy 3 knob+deadbolt sets of the same number. All packages with the same key number use the same key. Look at the packages for 'Key Numbers'Д®very lock package will have a prominent 3-5 digit 'Key Number' somewhere on the outside of the package, typically the back.

Defiant rekeying kit