Do you need a new deadbolt, or a better one?
A deadbolt is the one piece of hardware on your door that does real work against force. The spring latch in an ordinary knob only holds the door closed. It does not hold it shut against a shoulder, a pry bar, or a slipped piece of plastic. A deadbolt's bolt is a solid steel bar that throws into the door frame, and when it is installed correctly it is what stands between your door and a kick.
People in San Fernando call us about deadbolts for a handful of reasons: a door that never had one, an old one that sticks or no longer turns smoothly, a move-in where nobody knows how many keys are floating around, or an attempted break-in that left the strike and frame damaged. Each of those calls for a slightly different job.
Deadbolt installation and deadbolt replacement are related but not identical. Replacement means putting a new bolt into holes that already exist in the door, which is usually the simpler job as long as the new hardware matches the old hole pattern. A fresh installation means cutting new holes in the door itself, and that is where most do-it-yourself attempts go wrong. We do both, and we tell you which one your door actually needs after we have looked at it.
If what you want is a whole new set of locks for the entry, with knob, deadbolt and matching keys, our broader lock installation service covers that. This page is about the deadbolt itself.
Single-cylinder or double-cylinder deadbolt: which belongs on your door?
A single-cylinder deadbolt has a keyway on the outside and a thumbturn on the inside. You unlock it from inside with your hand, no key needed. That is what most front doors have, and it is what we install most often.
A double-cylinder deadbolt has a keyway on both sides, so a key is required to lock or unlock it from inside as well as outside. The reason people ask for double cylinder installation is glass. If your door has a window, a sidelight, or a thin panel within arm's reach of the thumbturn, someone could break it, reach through, and turn the thumbturn. With a keyed cylinder on the inside, there is nothing to turn without the key.
The tradeoff is real, and we will say it plainly. With a double-cylinder deadbolt, you need a key to get out. In a fire or any emergency, a missing key in the dark is a genuine danger. Many fire-safety rules restrict keyed-both-sides locks on exit doors in certain kinds of buildings, and rental properties and multi-unit buildings can have their own requirements. If you rent, check with your landlord. If you own, your city's building department can tell you what applies to your property. We will not install one without talking through this with you first.
Plenty of people who ask for a double-cylinder end up happier with a single-cylinder bolt and a different fix: a solid door, longer strike screws, or a lock position that is not within reach of the glass. If you do go double, keep a key in a set spot near the door, out of reach from the outside, and make sure everyone in the household knows where it is.
- Single-cylinder suits most solid doors, and it is the easier choice for everyday use and for getting out quickly.
- Double-cylinder suits doors with glass or a breakable panel close to the interior thumbturn.
- Double-cylinder means a key is needed from inside, so confirm it is allowed in your building and plan where the key lives.
- Neither type helps much if the door, the frame, or the strike is weak, which is why we check all three.
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Call (213) 577-1366How does a deadbolt installation work, step by step?
Here is what happens when we come to your door. The order matters, because a deadbolt that is fitted well on a poorly prepared door still fails.
- We look at the door first: material, thickness, any existing holes, the condition of the frame, and whether there is glass near where the lock will sit.
- We choose the hardware with you: single or double cylinder, the grade, the finish, and whether the keys should match another lock you already have.
- If the door is new to deadbolts, we mark the height and backset and bore the two holes a standard deadbolt needs: a large one through the face of the door and a smaller one into the edge. If we are replacing a bolt, we check that the existing holes are clean and the right size.
- We fit the bolt assembly into the edge of the door and set the faceplate flush so it does not catch or rattle.
- We mount the exterior cylinder and the interior piece, tightening them evenly. Over-tightening is a common mistake that makes the bolt bind.
- We set the strike plate into the frame with a clean recess and screws long enough to reach the framing behind the jamb, not just the soft trim wood.
- We test it with the door open, then closed, then locked and unlocked repeatedly from both sides. The bolt should extend fully and smoothly without lifting or pulling the door.
- We hand over the keys, show you how it should feel, and tell you what to watch for as the door and frame age.
What happens when the door fights back? Swollen wood, old frames and misalignment
Most deadbolt trouble we see is not a bad lock. It is a door and frame that no longer line up. A bolt that has to be shoved into the strike, or a key that turns only if you lift the door, is telling you the alignment is off.
Summers in this part of the Valley are hot, and heat swells wood doors and frames. A bolt that fits cleanly in cooler weather can drag or bind when the door expands. We take that into account when we align the strike, leaving the right amount of clearance so the bolt works across seasons, not just on the day we install it.
Older frames bring their own problems: layers of paint packed into the strike recess, old screw holes stripped out, and gouges where earlier locks were forced or poorly fitted. We clean up the recess, fill or relocate holes as needed, and drive solid screws into the framing. If a frame is split or rotted, we will say so. A new deadbolt will not fix a failing frame, and in that case the honest answer is a frame repair first, often by a carpenter, before any lock goes on.
Santa Ana wind events also push fine dust into exterior cylinders. A gritty cylinder feels stiff well before it fails. A small amount of dry lubricant now and then helps. Avoid oily sprays, which tend to hold dust and make the problem worse over time.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366How much does deadbolt installation cost in San Fernando?
We do not quote a number on a web page, because the real price depends on your door. What we can do is tell you exactly what moves it up or down, so nothing surprises you when we are standing at your entry.
The usually more economical route is a straightforward deadbolt replacement, where a matching bolt goes into holes that already exist. Cost rises when the door needs new boring, when the frame needs reinforcing, or when the hardware you want is a higher grade.
- New installation versus replacement: cutting fresh holes takes more time and care than swapping into existing ones.
- Door condition: warped, swollen, hollow, or previously damaged doors can need extra prep.
- Hardware grade: basic, mid-range and heavy-duty deadbolts differ in construction, pick resistance and strike strength.
- Single or double cylinder: double-cylinder hardware and keying are a different product from a standard thumbturn bolt.
- Frame and strike work: reinforcing the strike area or repairing old damage adds labor.
- Keying: matching your new deadbolt to an existing lock, or to several doors, takes extra setup.
- Number of doors: doing several doors in one visit is a different job from a single one.
- Timing: after-hours and emergency calls are handled differently from scheduled work.
- Electronic or smart models: these cost more than mechanical bolts and may need extra setup.
Deadbolts for San Fernando bungalows, cottages and small apartment buildings
San Fernando is a compact, independent city, about 2.4 square miles, with early-1900s bungalows, Spanish-style cottages, postwar homes on small lots, and small apartment buildings near the downtown mall. That housing mix shapes what we do with deadbolts in ZIP code 91340.
Many older homes still carry their original door hardware. In the Las Palmas Park area, we often hear from owners of older bungalows who call for rekeying and find out that the old lock itself is worn out. If the cylinder is tired, rekeying it only resets keys on hardware that is already failing. In that case, a new deadbolt is the better move. If the lock is sound and you only need new keys, the lock rekey service is the lighter-cost option, and we will tell you which situation you are in.
Security screen doors are a common retrofit on pre-war homes here, and they matter for deadbolt work. The screen door's latch is not what protects the house; the deadbolt on the main door behind it is. When we install or replace one, we check that the screen door still swings and latches without the new hardware or your key catching on it, and that you can reach the thumbturn and key comfortably with the screen closed.
Around the Civic Center area and the blocks closest to the San Fernando Mall, small apartment buildings mean the question is often who is allowed to authorize the work. Tenants should talk to the landlord before anything is changed, and property owners with several units can use our locksmith for landlords service to handle doors together.
Storefronts line Maclay Avenue, Truman Street and San Fernando Road. Commercial doors use different hardware than a house, and a business entry usually calls for storefront lock repair rather than a residential deadbolt. If you live above or behind a shop along those corridors, tell us which door you mean when you call.
San Fernando is about 23 miles from our Westwood storefront, and we serve it with mobile service vans, so most deadbolt jobs get done right at your door.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366Why call Wilshire Lock & Key for a deadbolt?
We have been in business since 1987. We have a storefront at 10740 Wilshire Blvd in Westwood and mobile service vans that cover 140 cities across Los Angeles and Ventura counties, San Fernando included. When you call (213) 577-1366, you reach us, not a call center passing your address to whoever is closest. We are one company, with no dispatch middlemen between you and the person at your door.
David, the owner and lead technician, oversees the work. That matters on a deadbolt because the small decisions are where jobs succeed or fail: where the bore sits, how deep the strike goes, whether the bolt clears when the door swells. Those details are not visible in a photo, but you will notice them every day you use the door.
We answer the phone around the clock, every day of the year. If you are locked out or a door was damaged and you need it secured right away, our mobile locksmith service can come to you.
How do you choose a deadbolt that is actually secure?
Not every deadbolt on a hardware-store shelf is the same. A few things separate a solid one from a weak one, and we are happy to walk through them with you.
- Grade: deadbolts are graded by how much abuse they are tested to take. Higher grades use heavier internal parts and stronger bolts.
- Bolt length: a longer bolt that goes deeper into the frame resists kicking better than a short one.
- Strike plate and screws: this is the weak link on many doors. Long screws into the framing matter as much as the lock.
- Cylinder quality: better cylinders resist picking and bumping. If that is a worry, our high security locks page covers the options.
- Key control: some cylinders use restricted keys that cannot be copied at a hardware store, which helps when many people have had keys.
- Electronic options: if you would rather skip keys on the inside or outside, smart lock installation is a separate service we can discuss.
What should you ask any locksmith before work starts?
California requires locksmith companies to hold a license from the Bureau of Security and Investigative Services, known as a BSIS locksmith company (LCO) license. Ask any locksmith for that license number before they start work on your door, and you can check it with the state yourself. That is good practice whether you are calling us or anyone else.
Also ask what the work will cost and what factors could change it, and ask whether the technician will be the one doing the job. A straight answer to each is a good sign. A company that cannot explain its pricing before the work starts is a company to be careful with.
Frequently asked questions
How long does a deadbolt installation take?
It depends on the door. Replacing a bolt in holes that already exist is a shorter job. Boring a door for the first time, fixing an old strike area, or doing several doors takes longer. Once we see the door, we can tell you what to expect.
Can you install a deadbolt on an old wood door?
Usually yes, as long as the door is thick and solid enough to hold the holes without weakening. Older San Fernando bungalow doors are often fine, but a door with deep cracks, rot, or a thin panel near the lock may need repair first. We will tell you if that is the case.
Should I get a double-cylinder deadbolt?
Only if glass or a breakable panel is within reach of the inside thumbturn. A double-cylinder deadbolt needs a key from both sides, which can be dangerous in a fire, and it may be restricted in some buildings. We talk through that before installing one.
Is it better to replace my deadbolt or just rekey it?
If the lock works smoothly and you only need new keys, rekeying is usually the lighter-cost route. If the bolt is worn, sticks, is damaged, or is a weak grade, replacement makes more sense because rekeying will not fix the hardware itself.
Can I have a deadbolt installed behind a security screen door?
Yes. Many older homes in San Fernando have security screen doors, and we install deadbolts on the main door behind them all the time. We check that the screen door still opens and latches properly and that you can reach the lock comfortably.
Can the new deadbolt use the same key as my other locks?
Often, yes. We can key a new deadbolt to match an existing lock if the brands and keyways are compatible, so you carry one key instead of two. If they are not compatible, we can discuss other ways to simplify your keys.
I rent. Can I have a deadbolt installed?
Talk to your landlord first. Changing hardware on a rental often requires permission, and some buildings have rules about lock types, especially double-cylinder deadbolts. If you are a landlord, we can work with you on one door or several.
Do you install deadbolts at night or on weekends in San Fernando?
We answer the phone 24 hours a day, 7 days a week, year-round at (213) 577-1366. If your door was damaged or will not lock and you need it secured, call and tell us what happened. We will explain what we can do and how the timing affects cost.
I am locked out and my deadbolt is the problem. What should I do?
Call us and describe the situation. Our house lockout service gets you back inside, and if the deadbolt is worn or broken, we can talk about replacing it while we are there.
More locksmith help in San Fernando
Deadbolt Installation near San Fernando
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.
