Can All the Locks on My House Use the Same Key?
In many cases, yes—you can use one key for house locks by having a locksmith rekey compatible locks. That key can operate your front door, back door, and other keyed entry doors. You may be able to keep your existing deadbolts and door handles. The deciding factors are the locks’ keyways, cylinder designs, and condition. Some combinations require a cylinder or lock replacement before they can share one key.
To explain which locks can share a key, we’ll compare two common residential keyways: Kwikset KW1 and Schlage SC1. These keyways are used by several lock brands found in homes throughout Broken Arrow and the Tulsa area.
Can Different Brands of Locks Use the Same Key?
Yes, different brands of locks can sometimes be rekeyed to use the same key. The important detail is the keyway, which is the shaped opening where the key enters the lock.
The KW1 keyway is commonly found in Kwikset, Dexter, Weslock, and many other budget residential locks. Compatible locks using this keyway can often be rekeyed to work with one key, even when the brand names are different.
Schlage and many Emtek residential locks commonly use the Schlage C keyway, which accepts an SC1 key. This keyway is different from KW1. Rekeying alone does not make a standard KW1 cylinder accept an SC1 key, or vice versa.
What If My House Has Different Keyways?
At Fortress Lock & Safe, we first inspect the locks to see which keyway is most common throughout the house. We also check the condition of the hardware.
If most of your locks use one compatible keyway, we can often keep those locks and recommend replacing the locks that do not match. We then rekey the compatible locks so they operate with one key.
For example, if most of your doors have serviceable KW1 locks and one door has an incompatible lock, replacing that one lock may let you simplify your keys without replacing every lock in the house.
The recommendation depends on compatibility, hardware condition, and your preferences. The goal is to give you dependable locks and convenient access without replacing good hardware unnecessarily.
Can My Keypad or Smart Lock Use the Same House Key?
Often, yes. If your keypad or smart lock has a backup key cylinder that is compatible with your other house locks, it can usually be rekeyed to use the same key.
At Fortress Lock & Safe, we include compatible backup key cylinders when rekeying a home. This lets you use your keypad for everyday entry while keeping one house key for the other doors and the keypad lock’s backup cylinder.
Some electronic locks have no key cylinder, and others use a different keyway or cylinder design. We check the specific model before recommending whether it can match your existing locks.
Changing the keypad code does not change the physical key. If you need to prevent previous access, both the backup key cylinder and electronic access settings should be addressed.
What Does It Cost to Use One Key for House Locks?
The cost depends on how many lock cylinders need rekeying, whether they are compatible, and whether any hardware needs replacement. A door with both a keyed knob and a deadbolt has two cylinders to consider.
If your existing locks are compatible and in good condition, rekeying may let you keep the hardware you already own. If some locks use a different keyway, the estimate may also include replacement hardware and installation.
When requesting an estimate, tell us how many keyed locks you have, whether you have working keys, and whether any locks are sticking or damaged. Photos of your locks can help us identify the hardware and explain your options.
Fortress Lock & Safe checks compatibility and condition before recommending what to keep, rekey, or replace.
Don’t Get Scammed: Know What You’re Buying Before Replacing Your Locks
Losing your key does not automatically mean you need all new locks. You may already have good-quality, name-brand locks that simply need to be rekeyed. A locksmith can often rekey serviceable locks even without the original key, although additional work may be needed.
Be cautious if someone arrives and immediately recommends replacing every lock just because you do not have a key. Ask them to explain why the existing locks cannot be rekeyed. Damaged or badly worn hardware may need replacement, but a missing key alone is not enough reason to replace everything.
Know what you have—and what you are paying to receive. If replacement is necessary, ask for the brand and model before approving the work. Schlage and Kwikset offer established residential hardware options, but the specific model and construction matter too.
Do not assume that replacing an existing Schlage or Kwikset lock with a budget Defiant or RELIABLT lock is an upgrade. You could be paying to replace serviceable hardware with a lower-cost product. Ask why that replacement is recommended and whether it offers comparable quality.
Unnecessary replacement can increase the bill without improving your security. At Fortress Lock & Safe, we inspect your existing hardware, explain your options, and recommend rekeying when it provides a dependable solution.
Want One Key for House Locks?
Fortress Lock & Safe helps homeowners in Broken Arrow, Tulsa, and surrounding communities simplify their keys. We inspect your locks, identify compatible keyways, and explain which locks can be rekeyed and whether any hardware needs replacement.
If you are planning to buy new locks or install a keypad, contact us first so we can help you choose hardware that works with your other doors.
Call or Request service online to discuss your home’s locks.