What does deadbolt installation involve at a Bell home?
A deadbolt is the lock on your door that does the real security work. The spring latch in a doorknob is built to hold the door closed, not to resist anyone. It can often be slipped open with a stiff card or pushed back with a pry tool. A deadbolt is different. When you turn the key or the thumb-turn, a solid steel bolt extends into the door frame and stays there until someone retracts it. Nothing springs back, so there is nothing to slip.
Deadbolt installation covers two jobs that sound alike but run differently. One is adding a deadbolt to a door that has none, which means boring a new hole through the door and cutting a mortise for the bolt. The other is deadbolt replacement, where we take out a worn, damaged, or mismatched deadbolt and fit a new one in the holes that already exist. Replacement is usually quicker, but it still has to be done carefully, because a new bolt that is off by an eighth of an inch will drag, bind, or never fully extend.
Most of the calls we get for this work fall into a few patterns: a front door with only a knob lock, a deadbolt that has gone stiff or loose after years of use, a bolt that no longer lines up with the frame, a door that was forced and needs a stronger lock afterward, or a unit where nobody can say how many keys are floating around. All of those are solved at the door, and most are handled in a single visit.
Single-cylinder or double-cylinder: which deadbolt should you choose?
Customers ask about double cylinder deadbolt installation more than almost anything else, so here is the plain version. A single-cylinder deadbolt has a keyway on the outside and a thumb-turn on the inside. A double-cylinder deadbolt has a keyway on both sides, so you need a key to open it from either direction.
The reason people want a double-cylinder is glass. If your door has a window in it, or a sidelight within arm's reach of the lock, a person who breaks the glass can reach in and turn a thumb-turn. A keyed inside cylinder takes that option away. The tradeoff is real, though: in a fire or any emergency, everyone inside needs to find a key fast. For that reason, many fire-safety authorities discourage double-cylinder locks on residential exit doors, and some rental properties and local rules restrict them. We will tell you honestly when we think a double-cylinder is the wrong call for your door.
- Single-cylinder: the right choice for most solid doors. You can exit instantly without a key, and it is the easier option for children, guests, and older family members.
- Double-cylinder: worth considering when there is glass within reach of the lock. You need a plan for where the key lives, such as a hook near the door but out of reach from outside.
- Neither works if the door itself is weak. A strong bolt in a hollow, cracked, or loose frame is only as good as what holds it.
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Call (213) 577-1366How we install a deadbolt, step by step
The process is not complicated, but the details decide whether a deadbolt feels solid for ten years or starts sticking in a month. This is how the work goes when one of our technicians comes out in a mobile van or when you bring the door hardware question to our Westwood storefront.
- Look at the door first. We check the material, thickness, existing holes, and the condition of the edge and frame, since that determines which deadbolt will actually fit and hold.
- Agree on the lock. We go over single versus double-cylinder, the security grade you want, finish, and whether you want keys matched to other locks on the property.
- Mark and bore. For a new installation we use a hole saw for the face bore and a spade or edge bit for the bolt hole, working from a template so the lock sits at the right height and backset.
- Cut the mortises. The bolt plate on the door edge and the strike plate on the frame each get cut flush so nothing stands proud and snags.
- Fit the lock body. The bolt, cylinder, and interior assembly go in, and we make sure the parts are square and not forced.
- Install and reinforce the strike. The strike goes in with long screws that reach through the jamb into the framing behind it, because short screws are the usual weak point on a kicked-in door.
- Test under real conditions. We cycle the bolt with the door open, closed, and pulled tight, and check that it throws fully without lifting or pushing the door.
- Hand over the keys and explain what you have. You get the keys, we label anything that needs it, and we make sure you know how the lock should feel when it is working right.
Deadbolt replacement: when a new lock is the right move and when it is not
Not every troublesome deadbolt needs replacing. If the lock turns fine but you are worried about who has keys, rekeying the lock changes the key without swapping the hardware, and it is usually the more economical route. If the bolt is merely misaligned because the door has shifted, we may be able to adjust the strike or reposition the plate rather than install anything new.
Replacement makes sense when the cylinder is worn and the key drags, the bolt is bent or cracked, parts are missing, the lock is a low-grade model that was never meant to resist force, or the finish and mechanism are failing. It also makes sense after an attempted break-in, when the lock or the frame around it has been stressed in ways you cannot always see.
Sometimes the lock is not the problem at all. A door that has swollen, a split jamb, or a strike screwed into thin trim will defeat a new deadbolt. If we find that, we will tell you before we install anything, and fix the fit or the frame as part of the job. For more general work like swapping a whole set of hardware, see our page on lock installation. If you want something beyond a standard keyed deadbolt, such as a keypad or app-controlled model, look at smart lock installation.
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Call (213) 577-1366What affects the cost of deadbolt installation in Bell?
We do not quote numbers on a web page, because the honest price depends on the door and the lock in front of us. Here is what moves the cost up or down, so you can see where an estimate comes from and judge it when you get one.
- New installation versus replacement. Boring a fresh hole in a door is more work than swapping a lock into holes that already exist.
- The lock itself. Security grade, brand, finish, and cylinder type all matter. A double-cylinder or a higher-grade bolt costs more than a basic single-cylinder.
- Door material and condition. Solid wood, metal, and hollow-core doors are worked differently, and a damaged or warped door can add repair work.
- Frame and strike work. Reinforcing a weak jamb, replacing a split frame piece, or fitting a heavier strike adds time and materials.
- How many doors. Doing several doors on one visit, and keying them alike, is usually more efficient than separate trips.
- Time and location of the call. A scheduled visit is different from an after-hours emergency, and we will explain what applies when you call.
Deadbolt installation across Bell: bungalows, apartments, and the Gage and Atlantic corridors
Bell is a compact city in ZIP code 90201, and its housing shapes what we see. Most homes date from the 1920s through the 1950s: small single-family bungalows on compact lots, plus low-rise apartment buildings, with a high share of renters. Older front doors in these homes often have a single knob lock and, if you are lucky, an old deadbolt that has been painted over more than once. Adding or replacing a deadbolt is one of the most common upgrades for those doors.
Take the multi-unit buildings off Gage Avenue near Downtown Bell. When a tenant moves out, the lock is a question mark: you do not know how many copies of the key exist. Owners and managers often decide to replace a tired deadbolt at the same time they change the key, and if you manage units, our locksmith for landlords page covers how we handle repeated turnover work. If you are a tenant locked out of your own unit, that is a different call, covered under apartment lockouts. Renters should also check their lease before changing a lock and get the landlord's okay first.
The same applies along the Atlantic Avenue corridor and the Florence Avenue corridor, where homes and small buildings sit close to busy streets and the front door is the main thing between you and the sidewalk. On the eastern side near Bell Gardens and along the riverside blocks by the LA River, we see the same mix of older bungalows and compact lots. The common request is straightforward: put a real bolt on a door that never had one, or replace the one that gives out.
Many older Bell homes also have a security screen door in front of the main door. That is a second layer worth having, but it does not replace a solid deadbolt on the inner door. Because the screen door often hides the main door's lock from the street, a good deadbolt behind it is a quiet, effective choice. If the screen door's own latch is the problem, that is lock repair rather than deadbolt installation, and we can look at it separately.
West of the Los Angeles River the city is largely industrial, around the former Cheli Air Force Station site. If you run a small shop in the Cheli industrial district near Rickenbacker Road and need a deadbolt on a side or office door, we handle that too, though gates and padlocks are their own category of work. Bell is about 19 miles from our Westwood base, and our mobile locksmith vans cover the city.
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Call (213) 577-1366How does Bell's heat affect a deadbolt?
Bell sits in the inland Los Angeles basin, with hot, dry summers and mild winters and very little marine influence. That matters for deadbolts in two ways.
First, heat swells older wooden doors and frames. In summer a door that closed cleanly in March can start to rub, and the bolt no longer lines up with the strike hole. Owners sometimes blame the lock and replace it, when the actual issue is that the door has moved. A cool, damp winter night can also cause sticking the other way. When we install a deadbolt, we check alignment with the door in its current condition and leave a little tolerance so normal seasonal movement does not bind the bolt.
Second, there is one thing you do not need to worry about. Salt-air corrosion is not a meaningful factor this far inland, so you do not need special marine-grade hardware just because you live in Los Angeles County. A standard quality finish will hold up fine; what matters more is solid fitting and good screws in the frame.
Why call Wilshire Lock & Key for deadbolt work?
We have been in business since 1987, and deadbolt work is the kind of job where experience shows. It is easy to drill a hole in a door. It is harder to do it so the bolt throws smoothly, the strike is fixed into the framing, and the lock still works in two summers.
We are one company with a storefront at 10740 Wilshire Blvd in Westwood and mobile service vans. When you call (213) 577-1366, you reach us, not a call center that passes your job to whichever contractor is free. The phone is answered 24 hours a day, seven days a week, year-round. David, the owner and lead technician, oversees the work, so there is someone accountable for how it is done.
If your situation is urgent, such as a door that no longer secures after a break-in attempt, say so when you call, and we will talk through what is possible. For broader after-hours situations, see our emergency locksmith page. If you would like more than a standard deadbolt, our high-security locks page explains the upgrade options.
What should you check before you hire any locksmith?
California requires locksmith companies to hold a BSIS LCO license, issued through the state's Bureau of Security and Investigative Services. Ask any locksmith you are considering for that license number, and check it before work starts. It is a reasonable question, and a legitimate company will answer it without hesitation.
Beyond that, ask what lock grade you are getting, whether the price covers the strike and any frame reinforcement, and what happens if the door needs adjusting. A clear answer beats a low number you cannot explain.
Frequently asked questions
How long does deadbolt installation take?
A replacement into existing holes is usually a fairly short job. Adding a new deadbolt to a door that has none takes longer because we have to bore and cut the door and frame. A damaged door or weak frame adds more time. When you call, describe the door and we will tell you what to expect.
What is the difference between deadbolt installation and deadbolt replacement?
Installation means adding a deadbolt where none exists, which requires drilling into the door and frame. Replacement means removing an existing deadbolt and fitting a new one into the same holes. Replacement is usually simpler, but both need careful alignment.
Is a double cylinder deadbolt a good idea for my front door?
It can be if your door has glass within reach of the lock, since a person cannot reach in and turn a thumb-turn. The tradeoff is that you need a key to leave. Many fire-safety authorities discourage them on residential exit doors, so we usually discuss this with you before installing one.
Can you install a deadbolt on any door?
Most solid wood and metal exterior doors can take one. Hollow or very thin doors, or doors with damaged edges, may need reinforcement first. We check the door before we start and tell you if something needs to be fixed to make the lock worthwhile.
Do I need a new deadbolt or just a rekey?
If the lock works well and your only concern is who has keys, rekeying is usually the more economical route. If the lock is worn, damaged, or low-grade, replacement is the better choice. We will recommend whichever fits your situation, and you can read more on our lock replacement page.
I rent in Bell. Can I install a deadbolt myself or have you do it?
Check your lease and talk to your landlord first, since many leases restrict changes to locks. If you have approval, we can install it, and the landlord may want a key. Property owners can ask about our work for landlords.
Will a new deadbolt work on a door that sticks in summer heat?
It will if the sticking is addressed. Heat can swell older wood and throw off alignment, so we check the fit and adjust the strike or door edge when needed. A new lock on a door that is rubbing will not fix the underlying problem.
Do you come to me or do I need to bring the door to you?
We come to you. Our mobile vans serve Bell, and you do not need to remove a door. Our storefront is at 10740 Wilshire Blvd in Westwood if you want to talk through hardware options in person.
Can you install deadbolts at night or on weekends?
Our phone is answered around the clock, every day of the year, at (213) 577-1366. Call and describe what you need, and we will tell you what we can do and when.
More locksmith help in Bell
Deadbolt Installation near Bell
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.