Why a deadbolt is worth getting right
The knob or lever lock on most front doors is built for convenience. It keeps the door shut and latched, but the spring latch inside is short, and on many doors it can be pushed back with a thin tool or forced with a shoulder. A deadbolt is the lock that does the real work. It is a solid bar of metal, turned by a key or thumbturn, that sits inside the door frame and does not retract unless the cylinder turns.
That only holds up if the deadbolt is installed well. A good bolt in a badly drilled door will drag, stick in summer, or stop short of the strike plate. A bolt that is not seated deep into the frame gives you a lock that looks strong and fails when tested. Most of what we do on a deadbolt job is not the lock itself. It is the drilling, the alignment, the strike plate, and the screws that decide whether the bolt is actually holding the door.
This page covers deadbolt installation and deadbolt replacement for homes and apartments in Torrance: new bolts on doors that never had one, swapping out worn or damaged bolts, and double cylinder deadbolt installation where it makes sense. If your situation is a broken key or a locked-out family member, call us anyway and we will sort out what comes first.
Single or double cylinder: which one fits your door?
A single-cylinder deadbolt has a key on the outside and a thumbturn on the inside. It is the usual choice for front doors, and for most households it is the right one. You can get out fast without hunting for a key, which matters in an emergency.
A double cylinder deadbolt installation puts a keyed cylinder on both sides. It is used mostly on doors that have glass in or beside them, where someone could break the pane, reach in, and turn a thumbturn. With a double cylinder, a burglar who breaks the glass still needs a key to open the door.
The tradeoff is real and we will not skip it. A double-cylinder bolt needs a key to exit as well as enter. In a fire or any rush, that can cost you seconds you do not have. Some rentals, multi-family buildings, and local rules restrict or discourage them, so check your lease, your building rules, and local requirements before you decide. If you do go that way, the usual habit is to keep a key near the door, out of reach from the glass but easy for everyone in the home to find.
- Single cylinder: best fit for solid doors, quick exit, simplest daily use.
- Double cylinder: considered for doors with glass nearby, where a thumbturn could be reached after breaking a pane.
- Neither type helps if the door, frame, or strike plate is weak, so we look at those first.
- Some buildings restrict double cylinders, so check your lease or association rules.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366How we handle a deadbolt installation, step by step
Every door is a little different, so we start by looking at yours rather than reaching for a standard kit. Here is how the work usually goes.
- We look at the door: material, thickness, condition, whether it already has a bore hole, and whether it swings cleanly. A door that sags or rubs gets noted before we drill anything.
- We look at the frame and the strike area. A deadbolt is only as strong as the wood or metal it bolts into, so we check for cracks, soft wood, or old damage.
- We talk through the lock choice with you: single or double cylinder, finish, key control, and whether you want it keyed to match your existing locks.
- We mark and drill the door to fit, or use the existing bore if you are replacing a bolt, and check the backset so the bolt sits where the hardware expects it.
- We mount the bolt, then install a strike plate on the frame, using longer screws that reach into the framing behind the trim rather than just the thin door jamb.
- We test the bolt with the door open, then closed, then in the heat of a normal day: it should throw all the way, without lifting the door or forcing it, and the key and thumbturn should move freely.
- We hand you the keys, show you how the lock works, and tell you anything about the door that is worth fixing later.
Deadbolt replacement, new installation, or just a rekey?
People call us with three different situations, and they do not all need the same work.
If your door has no deadbolt, you need a new installation. That involves drilling the door and frame, which is why we do it carefully. For general door hardware work around the house, see our lock installation page.
If you have a deadbolt that is worn, sticky, damaged, or no longer matches the rest of your hardware, deadbolt replacement makes sense. Often the existing bore hole can be reused, which keeps the job simpler.
If your deadbolt works fine and you just need different keys, because you moved in, lost a key, or ended a living arrangement, replacing the whole thing is usually not necessary. In many cases the existing deadbolt can be rekeyed so old keys stop working, and that is usually the more economical route. Our lock rekey page explains how that works. We will tell you honestly if a rekey is all you need.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366What affects the cost of deadbolt installation in Torrance?
We do not quote numbers on a web page, because the real price depends on your door, and a fair number needs a look at it or at least a clear description. Here is what actually moves the cost up or down.
When you call, tell us about the door and what you want. We will explain the work and what drives the cost before we start, so there are no surprises on the doorstep.
- New installation versus replacement: drilling a fresh bore takes more work than swapping into an existing one.
- The lock itself: standard grade hardware costs less than higher-security bolts with pick-resistant cylinders, hardened inserts, or restricted keys.
- Single versus double cylinder: a different mechanism and, sometimes, extra fitting on the interior side.
- Door condition: a warped, hollow, or damaged door may need repair or reinforcement before a bolt will hold.
- Frame and strike work: reinforcing a weak frame or fitting a longer strike takes added time and materials.
- Number of doors: matching several doors to one key is more work than a single bolt, though it often saves you carrying extra keys.
- Timing and location: after-hours calls and distance from our base can affect the total, which is why we explain it on the phone.
Why call Wilshire Lock & Key for a deadbolt
We have been in business since 1987, and a deadbolt is one of the oldest jobs in the trade. We know how doors from different decades behave and how to fit new hardware to them without butchering the wood.
We are one company. We run a storefront at 10740 Wilshire Blvd in Westwood plus mobile service vans, and when you call (213) 577-1366 you reach us, not a dispatch middleman who sells your job to whoever is closest. David, the owner and lead technician, oversees the work, and that is how we keep the standards the same on every door.
Torrance is about 21 miles from our base, and we serve it as part of the 140 cities we cover across Los Angeles and Ventura counties. You do not need to come to us. Our mobile locksmith service brings the tools and a stock of hardware to your door. The phone is answered around the clock, every day of the year.
One more honest point. California requires locksmith companies to hold a BSIS LCO license, and you should ask any locksmith you are considering for that number before they start work. It is a reasonable question and a good company will not mind it.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366Deadbolts across Torrance homes: what we see and why it matters
Torrance has a split personality when it comes to housing, and the right deadbolt job depends on which side your home falls on. Most of the city was built as large postwar ranch-style tracts in the 1950s and 1960s. In West Torrance and South Torrance especially, many of those homes still carry original mid-century locksets. A front door like that may have only a basic latch and a worn knob, and adding a proper deadbolt is often the most useful upgrade you can make. Residential rekeys in the postwar tracts of West and South Torrance are common work for us, and the same visit is a good moment to decide whether a new deadbolt belongs on the door too.
Old Torrance is different. It was laid out in 1912 with planning by Frederick Law Olmsted Jr., and it holds early-20th-century bungalows and craftsman homes. Doors there can be older, thicker, or oddly proportioned, and some carry vintage hardware worth preserving. A deadbolt on a door like that needs a careful hand: the bore, the trim, and the look of the door all matter. We will tell you plainly if a modern bolt can be fitted without damaging the original character.
Closer to the coast, the marine layer brings damp air and some salt-air wear, especially around the Hollywood Riviera and near Torrance Beach. Hardware there can corrode faster, so finish and material matter more. Inland neighborhoods such as Southwood and Seaside Ranchos are milder and drier, with less corrosion, though summer heat can still make doors expand and bolts bind if the alignment is tight. We allow for that when we fit the strike.
In North Torrance and along Western Avenue, apartments are common. Renters and property managers there often ask about deadbolt replacement after a move-out, or about what is allowed on a unit door. If you are locked out of a unit, see our apartment lockout page. Condo and townhome clusters near Del Amo Fashion Center bring their own questions, since exterior door hardware may be governed by association rules. The same is true at New Horizons South Bay, a large gated senior community, where residents should check with their association before changing exterior hardware. Whether your home sits in ZIP code 90501, 90503, 90505, or anywhere else in Torrance, the process is the same: we look at the door first, then choose the bolt.
Getting more security than the bolt alone
A deadbolt is one part of a door's defense. Once the bolt is in, the weakest point is usually the strike plate and the frame. We use longer screws and a solid strike so a kick does not split the jamb. If your frame is already damaged, we will say so rather than leave a good bolt on a bad door.
If you want something stronger than standard hardware, our high-security locks page explains options like pick-resistant cylinders and restricted keys. If you would rather skip the key altogether, our smart lock installation page covers keypad and app-based bolts. Both start from the same fundamentals: a well-fitted door, a solid frame, and a bolt that throws cleanly.
If you are locked out right now and need the door opened before anything else, call us for a house lockout and we will handle that first. The deadbolt work can wait until you are back inside.
Frequently asked questions
Can you install a deadbolt on a door that never had one?
Usually yes. It involves drilling a bore through the door face and a hole in the edge, then fitting the strike on the frame. We check the door's thickness, material, and condition first. Very thin, hollow, or damaged doors may need reinforcement, and we will tell you before we drill.
What is the difference between single and double cylinder deadbolts?
A single-cylinder deadbolt uses a key outside and a thumbturn inside. A double-cylinder one needs a key on both sides. Double cylinders are mostly used where glass is near the lock, but they slow your exit in an emergency, so many people choose single cylinder.
Is double cylinder deadbolt installation allowed in my home?
It depends on your building and local rules. Some rentals, multi-family buildings, and associations restrict or discourage double cylinders because of exit safety. Check your lease or association rules, and ask your local building or fire authority if you are unsure. We can talk through the tradeoffs on the phone.
Do I need a new deadbolt, or can you just rekey the one I have?
If the bolt works smoothly and you only need new keys, a rekey is often enough and is usually the more economical route. If the bolt is worn, damaged, or does not suit your needs, replacement makes more sense. We will give you an honest recommendation.
Will a new deadbolt fit my old Torrance door?
Most of the time, yes. Postwar ranch doors usually take a standard bolt well. Older doors in Old Torrance may have unusual thickness or vintage hardware, which takes more care. We look at the door before we choose the bolt, and we will say if the fit is a problem.
How do you decide what the job will cost?
Cost depends on whether it is a new installation or a replacement, the grade of the lock, single or double cylinder, the condition of the door and frame, how many doors you have, and when and where we are called. We explain it before we start work.
Can you match the new deadbolt to my existing keys?
Often we can, depending on the brands and keyways involved. Having one key for the front door and deadbolt is convenient. If matching is not possible, we will tell you and explain the options.
Do you come to me, or do I bring the door to you?
We come to you. Our mobile vans serve Torrance, and our phone at (213) 577-1366 is answered 24 hours a day, every day. Our storefront is at 10740 Wilshire Blvd in Westwood, but you do not need to visit it for a deadbolt installation.
Should I ask about licensing before you start?
Yes, with any locksmith. California requires locksmith companies to hold a BSIS LCO license, and you are entitled to ask for the number. It is a smart habit before anyone works on your door. You can also reach us through our contact page with any questions first.
More locksmith help in Torrance
Deadbolt Installation near Torrance
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.
