Rekey Locks: The Moments That Call for It, and One Key for Every Door

Why Rekeying Is Really About Who Holds Keys

A lock is only as private as its key list. The deadbolt on your front door may be solid steel and perfectly installed, but if a former tenant, an old roommate or a contractor from three years ago still has a working key, that deadbolt does nothing to keep them out. Rekeying fixes the key list without touching the parts of the lock you can see.

Inside a typical pin tumbler cylinder, small pins of different lengths line up with the cuts on your key. Change those pins and you change which key works. The knob, lever, deadbolt, finish and latch all stay exactly where they are. Only the key changes, and every copy of the old one, wherever it ended up, becomes useless.

That makes rekeying the right tool for one specific problem: uncertainty about who can get in. It isn't a repair for a sticky latch, and it doesn't make a light-duty lock stronger. What it does is answer the question that follows most life changes, which is whether the people who held keys before still should.

A useful rule of thumb: rekey whenever the number of keys in circulation is unknown to you, or includes someone who no longer belongs on the list. The sections below walk through the most common versions of that moment, along with the other big reason people call, which is wanting a single key to run every door.

Moving In: Every Key You Never Received

New homeowners usually receive a handful of keys at closing, sometimes on a ring with a note, sometimes loose in a kitchen drawer. What you don't receive is a history. You can't know how many copies the seller made over the years, who got them, or whether the house sitter from two summers ago ever gave one back.

The list of possible key holders on a resale home is longer than most buyers expect: - The sellers and their adult children or relatives - Neighbors who watched the house during vacations - Housekeepers, gardeners, pool service and pet sitters - Contractors from past remodels or repairs - Real estate agents, stagers and anyone with lockbox access - Previous tenants, if the house was ever a rental

Renters face a similar list. Plenty of landlords rekey between tenants, but not all, and there's no way to tell by looking at the lock. If you're renting, ask the manager directly whether the unit was rekeyed after the last occupant, and if the answer is vague, request it in writing.

Brand-new construction isn't automatically clean either. Builders often use construction keying during the build, and a long parade of trades, inspectors and sales staff passes through before you get the keys. Confirming that every cylinder was switched over to homeowner keying is harder than simply rekeying.

The best time to rekey after a move is the day you take possession, before furniture, electronics and personal paperwork go inside. Scheduling it alongside the move also gives you a natural moment to settle the keying plan for the whole property.

Lost or Stolen Keys: Sorting Low Risk From Urgent

Not every missing key carries the same risk, and judging it honestly helps you decide how fast to act.

Lower risk looks like a single house key with no tag, no ID and nothing printed with your address, lost somewhere far from home. A stranger who finds it has no idea which door it fits. Many people still rekey for certainty, but there's rarely a reason to panic.

Higher risk means the keys went missing together with something that points to your door. That includes a wallet or purse with a driver's license, a car with the registration in the glove box, mail or packages showing your address, a key tag with your name, or a phone that isn't locked. In those cases, treat the rekey as urgent and try to get it done before you spend another night in the house.

The highest risk comes when keys are taken by someone who already knows where you live: during a burglary, in a car break-in in your own driveway, or by a person you have reason to worry about.

When you call, list everything that was on the ring. A typical ring opens more than the front door: back door, garage entry, an office suite, a gate padlock, a parent's house. The rekey should cover every lock those keys could open, not just the one you use most. Car keys and fobs are a separate job, because a vehicle key can be cut and programmed, but the missing one may also need to be erased from the car's memory so it stops starting the engine.

Roommates, Partners and Households That Change

Households change shape constantly. A roommate takes a job in another state, a couple separates, an adult child moves back home and then out again, a relative who stayed through a hard stretch finds their own place. Each departure leaves behind the same question: are all the keys accounted for?

Getting a key back helps, but it doesn't settle anything. Copies cost almost nothing at a hardware kiosk, and keys get lent to friends, left in old cars and forgotten in jacket pockets. Rekeying after someone moves out isn't an accusation. It's simply the only step that makes every outstanding copy irrelevant.

A few practical points help these calls go smoothly: - Wait until the person's belongings are fully out, unless safety requires otherwise. Rekeying while someone still has property inside can start a dispute. - If you rent, get the landlord's approval. Most leases require it, and the landlord will want a copy of the new key. - If you own the home jointly with the person leaving, the right to rekey can become a legal question. A court order granting exclusive use, or a written agreement between owners, avoids trouble later. - Decide who gets new keys before the visit, so the locksmith cuts exactly the right number.

We handle these situations with discretion. We verify that the person requesting the rekey lives there or owns the property, do the work, and leave. We don't take sides, and we don't share details of the visit with anyone else.

Tenant Turnover: A Routine for Landlords and Managers

For landlords and property managers, rekeying is less an event than a habit. Every move-out puts at least one unaccounted key into the world, and the next tenant deserves a door that only their keys open.

California Civil Code section 1941.3 requires landlords to provide operable deadbolts on main swinging entry doors and locking devices on windows designed to open. A rekey keeps those deadbolts meaningful. Leases, local ordinances and your own insurance carrier may add obligations of their own, so check what applies to your properties. Whatever the minimum rules say, a turnover rekey is a modest expense compared with explaining to a new tenant, after the fact, how a former renter walked in.

A workable turnover routine looks like this: - Collect keys at the move-out inspection and note how many came back. - Rekey after cleaning and repairs are mostly done, so work crews aren't handed the new key unnecessarily. - Cover every keyed entry for the unit: main door knob and deadbolt, back or patio door, and garage entry where there is one. - Keep units on separate keys. One key for an entire building means one lost key exposes everyone. - Label the new keys and record the date in the unit file.

Owners with several vacancies can schedule them on the same day, which shortens the visit per unit. If your buildings use a master key system for maintenance access, mention it when you call. Rekeying a master keyed cylinder means working within the existing keying chart so your master key keeps opening every unit.

Contractors, Caregivers, Sitters and Other Borrowed Keys

Some of the most common reasons to rekey have nothing to do with moving. They come from the ordinary practice of lending keys to people who help around the house.

Remodels are the classic example. A kitchen project or an addition can run for months, with a general contractor, subcontractors, delivery drivers and inspectors coming and going. Keys are copied for convenience and lockbox codes get shared across job sites. When the final inspection is signed, a rekey closes out that access as cleanly as the last invoice.

Caregivers and household help raise the same issue more gently. A nanny, a home health aide, a housekeeper or a dog walker may have had a key for years and left on good terms. Rekeying when they move on isn't a judgment about them. It simply means the only keys in circulation are ones you issued recently, to people you can name.

House sitters, neighbors and friends who watered plants during a long trip add up too. Most households, asked to list everyone who has held a key in the past five years, can't do it with confidence. If that describes yours, it's time.

To keep the next round cleaner, consider giving temporary helpers something other than your house key: a keypad code you can delete, a lockbox you control, or a separate key that opens only a side gate or the garage. Those choices make the next transition far easier and may spare you another rekey altogether.

After a Break-In or a Safety Threat

Some rekeys can't wait for a convenient day. After a burglary, a car break-in that took house keys, or a threat from someone who has had access to the home, getting the locks changed quickly is part of making the house safe to stay in.

If a door was forced, the lock itself may be fine while the frame, strike or bolt is damaged. A rekey alone won't fix a split jamb or a bent bolt. In those cases, the right answer is repair or replacement on the damaged door, with every other exterior lock rekeyed to match the new hardware. Reinforcing the strike with longer screws that reach the wall framing is a common addition.

California gives tenants with protective orders specific rights. Under Civil Code sections 1941.5 and 1941.6, a landlord must change the locks within 24 hours of a tenant's written request in certain situations involving a protective order or similar documentation. The details depend on whether the restrained person lives in the same unit, so keep copies of your paperwork handy. A rekey is usually the quickest way for a landlord to meet that deadline.

When you call about a safety situation, say so up front. We move those visits up whenever the schedule allows, verify residency, rekey every exterior door and the garage entry, and recommend resetting smart lock codes, app access and garage opener remotes that same day. What we see and hear during the visit stays private.

Keying Every Door Alike: What Has to Match

Carrying one key for the whole house is one of the most practical upgrades you can make, and a rekey is the easiest time to do it. Locksmiths call this keying alike: setting several cylinders so the same key operates all of them.

The requirement is simple to state. Every lock in the plan has to share the same keyway, which is the shape of the slot the key slides into. Keyways are brand-specific. The common Kwikset residential keyway, often called KW1, won't accept a Schlage key, and Schlage's standard residential keyway, SC1, won't accept a Kwikset key. Other brands have their own profiles, though some store brands copy the Kwikset keyway, and Baldwin's Prestige line uses Kwikset's SmartKey cylinder.

That means the first step in any keyed-alike plan is a lock-by-lock inventory: - Read the brand on each lock face or key head. - Note any lock with no brand name, which usually signals a budget model with an uncommon keyway. - Count cylinders, not doors. A front door with a knob and a deadbolt has two.

If everything is one brand, keying alike is straightforward: each cylinder is pinned to the same new key. If you have a mix, the usual move is to bring the minority brand into line. Replacing one deadbolt costs less than replacing three knobs. A few locks accept replacement cylinders in a different keyway, but most residential locksets are simpler to replace as a unit.

Within a brand, check that the cylinders take the same key blank. Schlage, for instance, makes both five-pin and six-pin residential cylinders, and a plan that mixes them has to be pinned with that difference in mind.

Locks That Complicate a One-Key Plan

Most homes can get down to one key, but a few common locks resist joining the set. Knowing them in advance saves a surprise during the visit.

• Sliding patio doors. Many slider handles have no exterior cylinder at all, and those that do often use small proprietary cylinders that can't be keyed to a house key.
• Security screen doors. Steel screen doors, common across inland Southern California, often carry their own lock box with one or two cylinders. Some accept standard house cylinders; others use the manufacturer's own keyway.
• Padlocks. Inexpensive padlocks usually can't be re-pinned. Some commercial-grade padlocks can, and a few take house-style cylinders.
• Mailboxes. Cluster box units use small mailbox locks with their own keys. They can be changed, but they rarely match a door key.
• High-security cylinders. Medeco, Mul-T-Lock and similar systems use patented keys controlled through authorized dealers. They can be keyed alike within their own system, just not with a standard house key.
• Smart locks. Most keep a backup key cylinder that can join the set. The Yale Assure Lock SL has no key cylinder at all, and retrofit units such as the August Smart Lock mount over your existing deadbolt, so rekeying that deadbolt works as usual.

When a lock can't match, you have three choices: replace it with one that does, keep it on a separate key, or switch it to a keypad or combination so it needs no key. For outbuildings and gates used by service providers, a separate key is often the smarter choice anyway, since it keeps the house key off a stranger's ring.

Rekey, Replace or Both

Rekeying assumes the lock is worth keeping. When it is, rekeying costs less than replacement and reuses hardware that already fits the door, matches the finish and works fine. When it isn't, a rekey just extends the life of something that's failing.

Signs a lock should be replaced rather than rekeyed: - The deadbolt doesn't fully extend, or you have to push or pull the door to throw it. - The cylinder spins, wobbles or sits loose in the door. - The knob or lever droops, the latch sticks, or the return spring is broken. - The finish has corroded through and the key drags even after cleaning. - The lock is a light-duty model on a door that needs better protection.

Mixed situations are common. A typical house might have a sound front deadbolt and back door lock, a worn-out garage entry knob and a corroded gate lock. The efficient answer is to replace the two bad pieces with locks in the same keyway as the good ones, then rekey everything to one new key in a single visit.

Upgrades follow the same logic. If you've been meaning to add a keypad deadbolt on the side door or a heavier deadbolt on the front, the moment you're changing keys is the moment to do it, because the new hardware gets keyed to match before you ever carry a separate key for it. We'll talk through the options honestly, including telling you when a perfectly good lock doesn't need to be touched.

What the Visit Looks Like, Start to Finish

A rekey visit is short and predictable when everyone knows what to expect.

It starts with the phone call. We ask why you're rekeying, how many locks are involved, what brands are on the doors, whether you have working keys, and whether you want everything on one key. That lets us quote and load the right parts before driving out.

On arrival, we check ID and proof that you own, rent or manage the property. A deed, closing statement, lease, utility bill or management agreement usually covers it, and executors and trustees bring estate paperwork. This step exists because the same rule that slows you down for a moment also stops a stranger from rekeying your house.

Then we walk the property together and confirm the plan door by door. Each cylinder comes out, gets cleaned and re-pinned to the new key, and goes back in. Kwikset SmartKey cylinders reset with a tool and the current key; most other brands are re-pinned by hand. Locks without a working key are picked or decoded first, which takes longer.

Before we leave, every new key is tried in every lock on a closed door, so the deadbolt throws fully into the strike. Misaligned strikes get adjusted on the spot. You receive the keys you asked for, cut and tested, along with a quick summary of which doors they open.

For most single-family homes, the whole job fits comfortably in one appointment.

Keeping Control Once the New Keys Are Cut

A rekey resets the key list to zero. What happens over the next few years decides whether you'll need another one soon.

Start with fewer keys. Two per adult who lives there, plus one spare kept with a trusted person rather than under a flowerpot, covers most households. More copies can always be cut later.

Write down who has each key, with the date. It takes two minutes and turns a future guess into a quick check. Landlords should keep this record per unit in the tenant file.

Use restricted keys where copying is a real concern. Standard keys can be duplicated at any hardware kiosk, and a do-not-duplicate stamp is only a request that some shops ignore. Restricted keyways require authorization to cut, which gives landlords, home businesses and large households genuine control.

Grant temporary access without handing out permanent keys. Keypad codes, smart lock guest access and lockboxes let you open the door to a helper and close it again without cutting anything.

Reset everything a rekey doesn't touch. Garage door opener remotes, keypad codes, smart lock users and app shares, and HOA gate credentials all live outside the lock cylinder. Change or clear them on the same day.

Finally, maintain the locks. A puff of dry lubricant once or twice a year keeps fresh pins moving freely, especially where dust and heat are hard on exterior hardware.

Where We Rekey, Our Hours and How Quotes Work

Julian's Locksmith is a mobile locksmith based in the University Heights area of San Bernardino, near Cal State San Bernardino. We drive to homes, rentals and businesses across the Inland Empire, the San Gabriel Valley, the Pomona Valley, north Orange County and southeast Los Angeles County, and we do the rekey on-site with pinning kits and key machines carried in the van.

Our hours are 6:30 a.m. to 11:30 p.m., every day of the week. We're closed overnight. We aren't a 24/7 service, so if keys go missing between 11:30 p.m. and 6:30 a.m., secure the house as well as you can with interior chain guards, a bar in the slider track or a temporary padlock on the gate, and call when we open at 6:30 a.m.

Pricing depends on how many cylinders are involved, the brands and keyways, whether working keys are available, any keyed-alike replacements, the number and type of keys cut, and timing. We quote before starting and never begin work you haven't approved.

Julian's Locksmith holds California locksmith company license LCO7891, issued by the Bureau of Security and Investigative Services, and you can verify it at search.dca.ca.gov. California's Locksmith Act, Business and Professions Code section 6980 and following, governs our work. Call (951) 903-3193 or email info@julians-locksmith.com to schedule a rekey.