Short answer: After a move, a lost key, or a tenant turnover, you usually have two options, and picking the cheaper correct one saves money without cutting corners on security. Here is how to tell them apart and where DIY ends.
After a move, a lost key, or a tenant turnover, you usually have two options, and picking the cheaper correct one saves money without cutting corners on security. Here is how to tell them apart and where DIY ends.
Rekeying leaves the lock body bolted to the door and changes only the pin tumblers inside the cylinder, so every old key stops working and a fresh key takes over. Because the hardware stays put, it is the natural choice when nothing is wrong with the lock and you simply need to control who has a working key: moving into a home whose previous owners, agents, and contractors all had copies; losing a single key; a roommate moving out; or making several doors open with one key, known as keying alike. Compatible consumer systems such as Kwikset SmartKey let a patient homeowner rekey a single deadbolt with a small kit, but those kits only work on the exact brand and keyway they are sold for and will not cross over to a different manufacturer's cylinder.
Replacement earns its higher cost when the lock itself is the problem or when you want something the old one cannot become. Swap the hardware when a cylinder is worn, sticky, corroded, or was damaged in a break-in attempt; when it is a low grade you have outgrown; when you want to change the style or finish; or when you are stepping up to a higher security grade, a restricted keyway, or a smart lock. Replacement is also the practical route when a lock's brand is difficult to rekey or parts are no longer available. In short, rekey to change who holds the key, and replace to change what the lock is or how well it performs.
Rekeying a single compatible deadbolt at your kitchen table is realistic if you follow the kit instructions carefully and keep the tiny parts organized. The job gets harder fast once you want several locks matched to one key, are working with older or high-security cylinders, or are fighting a lock that already sticks and binds. That is where a locksmith's full pinning kit, spare springs and pins, and day-to-day repetition turn an afternoon of frustration into a short visit. Pricing for both rekeying and replacement varies with lock type, quantity, and hardware quality, so it is worth getting a clear per-lock range up front rather than assuming one option is always cheaper.
Rekeying leaves the lock body bolted to the door and changes only the pin tumblers inside the cylinder, so every old key stops working and a fresh key takes over. Because the hardware stays put, it is the natural choice when nothing is wrong with the lock and you simply need to control who has a working key: moving into a home whose previous owners, agents, and contractors all had copies; losing a single key; a roommate moving out; or making several doors open with one key, known as keying alike. Compatible consumer systems such as Kwikset SmartKey let a patient homeowner rekey a single deadbolt with a small kit, but those kits only work on the exact brand and keyway they are sold for and will not cross over to a different manufacturer's cylinder.
Replacement earns its higher cost when the lock itself is the problem or when you want something the old one cannot become. Swap the hardware when a cylinder is worn, sticky, corroded, or was damaged in a break-in attempt; when it is a low grade you have outgrown; when you want to change the style or finish; or when you are stepping up to a higher security grade, a restricted keyway, or a smart lock. Replacement is also the practical route when a lock's brand is difficult to rekey or parts are no longer available. In short, rekey to change who holds the key, and replace to change what the lock is or how well it performs.
Rekeying a single compatible deadbolt at your kitchen table is realistic if you follow the kit instructions carefully and keep the tiny parts organized. The job gets harder fast once you want several locks matched to one key, are working with older or high-security cylinders, or are fighting a lock that already sticks and binds. That is where a locksmith's full pinning kit, spare springs and pins, and day-to-day repetition turn an afternoon of frustration into a short visit. Pricing for both rekeying and replacement varies with lock type, quantity, and hardware quality, so it is worth getting a clear per-lock range up front rather than assuming one option is always cheaper.
Call (650) 250-5400 and describe the situation, your exact location, and what you need. Timing is confirmed on that call rather than promised in advance.
Call for help: (650) 250-5400 — a straight answer and an honest estimate before any work begins.