What deadbolt installation actually involves
A deadbolt is the one lock on most doors that does real security work. The spring latch in your doorknob keeps the door closed, but it can often be pushed back with a thin piece of plastic or a firm shoulder. A deadbolt throws a solid steel bolt into the door frame and holds it there until a key or thumb-turn pulls it back. That is why insurance forms, landlords, and police crime-prevention advice all point to the same thing: put a good deadbolt on every exterior door.
Installing one sounds simple, and on a fresh, well-built door it can be. In practice, most calls we get in Bell Gardens are not fresh doors. They are older doors that have been painted many times, patched, re-hung, or drilled for a previous lock in a slightly different spot. The work is in making the new bolt line up cleanly with the frame, sit square in the door, and turn smoothly with no rubbing, no sticking, and no need to lift or lean on the door to get it to lock.
This page covers new deadbolt installation, deadbolt replacement, and double cylinder deadbolt installation. If your problem is a lock that already exists but has stopped working, that is closer to lock repair, and we will tell you honestly when repair is the better route than putting in something new.
Single-cylinder or double-cylinder: which deadbolt do you need?
The difference is on the inside of the door. A single-cylinder deadbolt takes a key on the outside and has a thumb-turn on the inside. A double-cylinder deadbolt takes a key on both sides. Most homes use single-cylinder, and for most people that is the right answer.
Double-cylinder deadbolts have a real use. If your door has a window or glass panel next to the lock, a thumb-turn can be reached by someone who breaks the glass and reaches through. A keyed inside cylinder removes that option. The tradeoff is serious, though: in a fire or any emergency, you need a key in your hand to get out. Many building and fire rules limit keyed-both-sides locks on exit doors in homes and rentals. If you rent, check with your landlord or property manager before asking us to fit one. If you own, we will talk through where the key will live and who in the household can reach it quickly.
- Single-cylinder: key outside, thumb-turn inside. Best for most doors, and the safest choice for fast exit.
- Double-cylinder: key on both sides. Makes sense mainly beside glass, and only where the rules and your household allow it.
- Either type should be a proper deadbolt with a solid steel bolt, not a thin latch with a deadbolt-style look.
- If the door has a large glass panel, sometimes the better fix is a security film or a different door, and we will say so.
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Call (213) 577-1366How we install a deadbolt, step by step
Every door is a little different, but the process is consistent. This is what happens when we arrive at your Bell Gardens address.
- Look at the door first. We check the material (solid wood, hollow-core, metal, or a door with a security screen in front), the thickness, the condition of the edge, and the frame behind the strike.
- Talk through the lock. We confirm single or double cylinder, what finish you want, whether you want the new bolt keyed to your existing keys, and whether anything about the door should change what we install.
- Measure and mark. We check for the standard bore layout and backset, or measure what the old lock used. If the door is already drilled, we confirm the holes are usable and not oversized or damaged.
- Drill or prepare the door. On a new install we bore the face hole and the edge hole with proper hole saws and a guide, which keeps the cut square. On a replacement we often reuse existing holes and clean up the edges.
- Mount the bolt and cylinder. The latch goes into the edge, the cylinder and interior parts go through the face, and everything is fastened so the lock does not shift in daily use.
- Set the strike plate. This is where many poor installs fail. We position the strike so the bolt enters fully, and we use long screws that reach the wall stud behind the frame, not just the thin jamb.
- Test it properly. We cycle the lock with the door open, then closed, then with the door pulled and pushed slightly, as it moves in real life. The bolt should throw all the way with a light turn.
- Hand over keys and explain. You get working keys, and we point out anything about the door or frame that could still be a weak spot.
Deadbolt replacement: when it makes sense, and when something else does
A lot of people call asking for a new deadbolt when what they need is different. Here is how we sort it out, so you do not pay for more than the job calls for.
If the deadbolt is in good shape but you do not know who has keys, rekeying the lock changes the internal pins so old keys stop working. It is usually the more economical route and fits well after a move, a breakup, or a tenant change. If the bolt is sticking, the key is hard to turn, or the cylinder has worn, repair or replacement of the lock body may be the right fix. If the lock is old, low-grade, bent, or has been forced, replacement is the sound choice.
Replacement is also the right call when you want to upgrade. A basic builder-grade deadbolt and a heavier, higher-grade one both look similar from the outside, but they differ in bolt material, internal parts, and how well they resist drilling, picking, and kicking. If you want something tougher, our page on high-security locks explains the options. If you want keyless entry or app control instead of a key, smart lock installation is a related but separate job.
- Replace when the lock is worn, damaged, forced, or not meeting your security needs.
- Rekey when the lock is fine but the key situation is not.
- Repair when a good lock has a specific, fixable fault.
- Upgrade when the door matters more than the original hardware allowed for.
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Call (213) 577-1366How much does deadbolt installation cost in Bell Gardens?
We do not quote numbers on a web page, because the real price depends on your door, and a number given without seeing it would be a guess. What we can do is tell you honestly what moves the cost up or down.
The lock itself is the first factor. Deadbolts come in different grades, from basic residential models to heavier, more pick- and drill-resistant ones, and the finish and brand also matter. Single-cylinder and double-cylinder models are priced differently, and a keyed-alike set, where several locks work with one key, is a different order than a single lock.
The door is the second factor. A new install on a door with no existing holes means drilling, which takes more time than swapping one deadbolt for another in existing holes. A door with damaged holes, a cracked edge, or a hollow-core build may need reinforcement. A frame with a weak or split jamb needs attention too, because a strong bolt in a weak frame is only as secure as the frame.
The third factor is how many doors you have and when and where we come out. A single door during normal hours is simpler than several doors at once, and after-hours calls are different from scheduled ones. When you phone (213) 577-1366, we ask about your door and lock, then explain what the job will involve and what is likely to affect the total before we begin work.
- Lock grade, brand, and finish.
- Single-cylinder or double-cylinder.
- New drilling versus replacing in existing holes.
- Door material and condition, including any repairs or reinforcement.
- Frame and strike condition.
- Number of doors and whether you want them keyed alike.
- Scheduling, including after-hours or same-day requests.
Deadbolts in Bell Gardens homes, apartments, and mobile home parks
Bell Gardens is a dense city with a strong renter majority, and the housing shows it. Much of it is pre-1960 small single-family homes and low-rise apartment complexes, with several mobile home parks, including the historic park around the Gage Mansion. That mix shapes the deadbolt work we do here.
In older bungalows along the Garfield Avenue and Florence Avenue corridors, it is common to find decades-old knob-and-deadbolt hardware still on the door. These sets are often loose, worn, or paired with a frame that has softened over time. Replacing them is rarely just a swap: the bore may be wider or narrower than modern hardware expects, and the strike area often needs reinforcing. We deal with these old doors regularly and plan for it.
Security doors are also common here, and they change the job. A deadbolt on the main door sits behind a steel or iron screen door that has its own lock. We make sure the new deadbolt can be reached comfortably and is not blocked by the security door frame, and we point out if the security door lock itself is the weaker point.
Along the Eastern Avenue corridor and around the 90201 ZIP code, many of the units are in multi-unit blocks where turnover is frequent. Property managers and landlords often want a deadbolt put in or replaced between tenants, so the new tenant has a lock only they hold keys to. In dense blocks, we can often handle several doors in one visit. If you manage rentals, see our page for landlords and property managers, and if you are a tenant locked out while waiting on this, our apartment lockout page covers that separately.
Mobile homes are their own case. Doors are lighter and thinner, and the frames are built differently from site-built houses, so standard hardware may need the right bolt length and mounting approach. We bring the correct parts when we know it is a mobile home door, so please tell us when you call.
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Call (213) 577-1366Heat, door movement, and why alignment matters here
Bell Gardens sits in the inland southeast part of the LA County basin. Summers are hot and dry, several degrees warmer than the coast, and winters are mild. The practical result for deadbolts is that doors and frames expand and contract with the heat. Corrosion from sea air is not the issue here. Movement is.
A deadbolt that slides in easily in cooler weather can start to bind in a hot spell if the bolt and strike were set with no margin. A good install leaves the bolt centered in the strike opening with a little room, so seasonal swelling does not turn a smooth lock into one you have to lean on. If your existing deadbolt turns harder in summer, the cause is often misalignment or a door that has shifted, not a bad lock. We can check that when we come out, and sometimes the fix is adjusting the strike rather than buying a new lock.
If a deadbolt is already fighting you in the heat, it is worth fixing before it gets worse. A bolt that only half-engages is easy to defeat and easy to lock yourself out on.
Why call Wilshire Lock & Key
We have been in business since 1987, working out of our storefront at 10740 Wilshire Blvd in Westwood, with mobile service vans that come to you. We serve 140 cities across Los Angeles and Ventura counties, and Bell Gardens is one of them, about 21 miles from our base.
When you call (213) 577-1366, you reach us directly, at any hour, any day of the year. There is no dispatch middleman passing your job to whoever is free. David, the owner and lead technician, oversees the work, and the person who talks with you is part of the company that does it.
California requires locksmith companies to hold a license from the Bureau of Security and Investigative Services, known as a BSIS LCO license. You should ask any locksmith you hire for their license number before they start, and that applies to us too. It is a sensible question and a good filter against the unmarked, out-of-area operators who advertise in every city.
If you need us outside normal hours, our 24-hour locksmith page explains how that works, and our mobile locksmith page covers how the vans reach you.
- In business since 1987.
- Storefront in Westwood plus mobile vans.
- One company, no handoffs to unknown subcontractors.
- David oversees the work.
- Phone answered 24 hours a day, 7 days a week.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366What to have ready when you call
A few details let us come prepared and avoid a second trip. None of this is complicated, and if you do not know an answer, we will work it out on site.
- Which door: front, back, side, garage entry, or a gate.
- Whether it is a new install or a replacement, and whether the existing lock still works.
- Single-cylinder or double-cylinder, or whether you want our advice.
- Door type: wood, metal, hollow-core, with or without a security screen door, or a mobile home door.
- Whether it is a rental, and if so whether the landlord has rules on keys or double-cylinder locks.
- How many doors, and whether you want them keyed alike.
- Any glass in or next to the door.
Frequently asked questions
Can you install a deadbolt on a door that does not have one?
Yes, if the door is thick enough and in good enough condition. We drill the face and edge holes, mount the bolt, and set the strike in the frame. Hollow-core or damaged doors may need reinforcement first, and we will tell you before we start if the door is not a good candidate.
What is the difference between single and double cylinder deadbolts?
A single-cylinder deadbolt uses a key outside and a thumb-turn inside. A double-cylinder uses a key on both sides. Double-cylinder makes sense mainly next to glass, but it needs a key to exit, which is a real safety concern in a fire, so check your lease and local rules.
Is double cylinder deadbolt installation legal for my home or rental?
It depends on the building, the door, and local rules. Many places restrict keyed-both-sides locks on exit doors. If you rent, ask your landlord first. If you own, we can talk through the safety tradeoffs, and in many cases a single-cylinder lock with a different glass solution is the better choice.
Can you replace my old deadbolt with a new one that uses the same key?
Often, yes. Depending on the brand and the existing lock, we can supply a new deadbolt keyed to match your current keys, or rekey the new one to match. Tell us what you have and we will confirm what is possible when we see it.
Should I replace my deadbolt or just rekey it?
If the lock works well and you only need to change who has keys, rekeying is usually the more economical route. If the lock is worn, damaged, forced, or low-grade, replacement is the better choice. We will look at the lock and give you a straight answer.
Will a new deadbolt work with my security screen door?
Usually yes, but the screen door frame can block access to the lock or the key. We check clearance and make sure you can reach and operate the deadbolt comfortably with the screen door closed.
My deadbolt is hard to turn in summer. Do I need a new one?
Not necessarily. Heat can make doors and frames expand, which causes the bolt to rub the strike. Adjusting the strike or the door may fix it. If the lock itself is worn, we will recommend replacement.
Can you install deadbolts on several units at once?
Yes. Landlords and property managers often need multiple doors done together, sometimes keyed alike or on a master system. Call us with the number of doors and any key requirements, and we will plan the visit around that.
Do you install deadbolts on mobile home doors?
Yes. Mobile home doors are thinner and built differently, so we bring parts suited to them. Let us know it is a mobile home when you call so we arrive with the right hardware.
Is someone available to install a deadbolt at night or on weekends?
Our phone line, (213) 577-1366, is answered 24 hours a day, 7 days a week, all year. If your door will not secure and it is after hours, call and we will tell you what we can do and how soon we can schedule it.
More locksmith help in Bell Gardens
Deadbolt Installation near Bell Gardens
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.