Why do Chatsworth homeowners install or replace a deadbolt?
A knob lock is not built to stop anyone who is serious about getting in. The latch bolt is short, beveled, and held out by a spring, which is why a credit card or a firm kick can defeat it. A deadbolt works differently. It is a solid steel bolt that only moves when a key or thumbturn moves it, with no spring that can be pushed back. That is the whole point, and it is why most calls we get about deadbolt installation fall into one of a few situations.
Deadbolt replacement and a brand-new installation are two slightly different jobs, and it helps to know which one you need before you call. A replacement usually reuses the holes already in your door. A new installation means drilling a fresh bore and an edge hole, which takes more care and a proper drilling jig.
- The door has only a knob or lever lock and no deadbolt at all, which is common in older houses and some rentals.
- The existing deadbolt is worn out: the key sticks, the thumbturn spins loose, or the bolt drags and has to be lifted into place.
- You just moved in and have no idea how many keys are floating around out there.
- There was an attempted break-in and the lock, strike, or door edge was damaged.
- You want to add a keyed lock to a side door, a back door, or the door between the garage and the house.
- You want a different style, a tougher grade, or a deadbolt that matches the rest of your hardware.
Single-cylinder or double-cylinder: which one fits your door?
A single-cylinder deadbolt takes a key on the outside and has a thumbturn on the inside. It is the standard choice for most front and back doors, and it lets everyone in the house get out quickly without hunting for a key.
A double-cylinder deadbolt takes a key on both sides. Its one real advantage is for doors with glass nearby: a sidelight, a glass panel, or a window in the door itself. If someone can break the glass and reach through to a thumbturn, a single-cylinder lock does very little. With a keyed inside cylinder, that reach-through doesn't open the door.
The trade-off is getting out. In a fire or any emergency, you need a key at the inside of the door, and someone in a panic may not find it. For that reason, many building and fire codes restrict keyed-both-sides locks on doors that serve as a home's exit, and some landlords, HOAs, and insurers have their own rules. We can't tell you what applies to your property, so check with your landlord, management company, or local building department before choosing one.
We will tell you plainly when we think a double-cylinder deadbolt is the wrong answer. Sometimes the better fix is a single-cylinder deadbolt plus a different door, a small security film on the glass, or moving the thumbturn out of reach. If a double-cylinder lock does make sense for your door, we install it and talk through where to keep the inside key so the lock is useful without being a hazard.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366How do we install or replace a deadbolt, step by step?
Every door is a little different, but the work follows the same order. Doing the steps in sequence, and not skipping the boring ones, is what separates a deadbolt that works for years from one that binds after a season.
- You call (213) 577-1366 and tell us what kind of door you have (solid wood, metal, fiberglass, glass panel), whether it already has a deadbolt, and what is going wrong.
- We look at the door itself: thickness, the distance from the door edge to the center of the bore (the backset), the size of any existing holes, and the condition of the door edge and frame.
- We go over the options with you: single or double cylinder, grade, finish, and keyway. If your door is thin, damaged, or hollow, we say so before anything gets drilled.
- For a replacement, we pull the old deadbolt and check that the holes are clean and square. For a new installation, we mark and drill the face bore and edge bore with a drilling jig so they meet at true right angles.
- We fit the latch and bolt in the door edge, set the cylinder and thumbturn assembly, and make sure the tailpiece engages the bolt properly without being forced.
- We set the strike plate in the frame, chiseling the pocket so it sits flush, and position it so the bolt enters fully. We use long screws that reach into the framing behind the jamb, not just the soft jamb wood.
- We test it with the door open and closed, from both sides. The bolt should extend its full length without the door being lifted or pushed, and the key should turn smoothly.
- We hand you the keys, show you how it should feel, and clean up after ourselves.
Why does alignment matter more than the brand name?
A deadbolt that is a quarter inch off at the strike will feel fine on the day it is installed and then start to fight you. The bolt rubs the strike plate, the key gets hard to turn, and people start to push or pull the door while they lock it. That strain wears the cylinder and the bolt faster than normal use ever would.
Doors move. Wood swells and shrinks with heat and moisture, hinges loosen, and houses settle. A good installation leaves a little forgiving room in the right places and no slop in the wrong ones. If your current deadbolt only works when you lift the door or pull it toward you, the problem is often the alignment, not the lock. We check that first, because sometimes a repositioned strike plate is the lighter-cost option and a new deadbolt isn't needed.
If the lock itself is worn, though, or the door has been kicked and the frame is split, a proper lock replacement with a reinforced strike is the honest fix.
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 Chatsworth?
We don't quote numbers in a web page, because the real price depends on your door and your hardware. We would rather explain what moves the cost so the quote you get on the phone makes sense. Here is what matters:
- New installation or replacement. Reusing existing holes is faster than drilling new ones, so replacement is usually the more economical route.
- Grade and build quality of the deadbolt. Heavier-duty hardware with hardened components costs more than a basic residential unit.
- Single or double cylinder. Double-cylinder hardware is a more specialized product.
- Door material and condition. Solid wood is straightforward. Metal and fiberglass doors need careful drilling, and a damaged or thin door may need repair first.
- Frame and strike work. A split jamb or a plate that needs a deeper pocket takes extra time and materials.
- How many doors. Doing several at once, or keying them all the same, changes the labor and parts involved.
- Keyway and extras. Restricted or high-security keyways, extra keys, and smart models change the total.
- Time of day. A late-night or holiday call involves a different kind of availability than a scheduled daytime visit.
What does deadbolt installation look like around Chatsworth?
Chatsworth is mostly single-story ranch homes from the 1960s and 70s, and a large share of our local deadbolt work is exactly what you'd expect from houses that old: knob-only front doors, side doors with nothing but a push-button lock, and original hardware that has had decades of use. Across 91311, one of the more common scenarios is a resident locked out after the hardware simply wore out. If that has happened to you, our house lockout service gets you in, and then we can replace the failed deadbolt while we are there.
Heat and wind are part of the picture here. Chatsworth is one of the hottest parts of the San Fernando Valley in summer, and Santa Ana winds funnel through the Santa Susana Pass in fall. Near the Stoney Point area and the rocky foothills, wind-blown grit works into exterior lock cylinders over time. We use a dry lubricant when we finish a job, since oily products attract dust, and we suggest a quality cylinder for doors that face the weather.
Townhome and condo owners at Rockpointe and similar 1970s-era complexes have a different question: what am I allowed to change? Before you swap exterior hardware, check with your HOA or management about finish and keying rules. If the complex has a master key arrangement, tell us up front. If your concern is who holds old keys rather than the lock's condition, a lock rekey may be the right job instead.
Toward the Santa Susana foothills and the gated equestrian area of Monteria Estates, properties often have detached garages or barns with their own locking hardware. Side doors on those outbuildings are good candidates for a keyed deadbolt, and if the driveway gate is the weak link, we can look at gate lock repair as well. Along Devonshire Street in Old Town Chatsworth and the De Soto corridor, business doors are a separate trade with different hardware, and our storefront lock repair page covers that side. This page is about residential deadbolts.
Chatsworth is about 26 miles from our Westwood storefront, and our mobile vans carry deadbolts, strike plates, and drilling tools so most jobs can be done in a single visit at your door.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366What grade and features should you look for in a deadbolt?
Residential deadbolts are graded by the ANSI/BHMA standard. Grade 1 is tested to the most demanding level, Grade 3 is the lightest residential level, and Grade 2 sits between them. For a front door, we generally steer people toward a Grade 1 or Grade 2 deadbolt. A side door or a shed door may not need the same.
- A bolt with a throw of at least one inch, so it seats deep into the frame.
- A hardened steel insert or roller in the bolt, which resists sawing.
- A reinforced strike plate and long mounting screws that reach framing.
- A cylinder with pick and bump resistance. See our high-security locks page if that matters to you.
- A restricted keyway if you want control over who can copy your key.
- A smart or keypad deadbolt if you want codes instead of keys. That is covered in smart lock installation.
Why call Wilshire Lock & Key for deadbolt installation?
We have been in business since 1987, and David, the owner and lead technician, oversees the work. You are not calling a national call center that sells your job to whoever is closest. We are one company with a Westwood storefront at 10740 Wilshire Blvd and mobile service vans, so the person who answers the phone is part of the same operation that shows up at your door.
We serve 140 cities across Los Angeles and Ventura counties, and the phone at (213) 577-1366 is answered 24 hours a day, 7 days a week, year-round.
One thing we encourage every customer to do: ask any locksmith for their California BSIS LCO license. The state requires locksmith companies to hold one, and a legitimate company will not mind the question.
If a deadbolt is not the right answer for your situation, we will say so. Sometimes an adjusted strike, a rekey, or a stronger door does more than another lock.
What should you have ready when you call?
A few details make the call quicker and the visit more accurate. If you can, have this information on hand, and if you cannot, we will work it out when we see the door.
Tell us which door it is and what it is made of. Tell us whether it already has a deadbolt and whether the old one still works. If it is a replacement, a photo of the existing lock helps. If glass is near the lock, mention it, since that changes the single versus double cylinder discussion. And if someone tried to force the door, tell us so we can inspect the frame as well.
If it is after hours and you are dealing with a break-in or a door that will not secure, say that at the start. Our emergency locksmith service is available at any hour, and we can make the door secure first and do the permanent installation afterward.
Frequently asked questions
Can you install a deadbolt on a door that does not have one?
Usually yes. We measure the door thickness and edge, then drill a face bore and edge bore with a jig. Solid wood, metal, and fiberglass doors can all take a deadbolt. A very thin or hollow door may not hold one well, and we will tell you before drilling.
Do I need a double-cylinder deadbolt?
Mainly if there is glass close enough to the lock that someone could break it and reach a thumbturn. For a solid door with no glass nearby, a single-cylinder deadbolt is usually the better choice, because you can exit quickly without a key.
Is a double-cylinder deadbolt allowed on my home?
It depends. Many building and fire codes restrict keyed-both-sides locks on doors that serve as an exit, and landlords, HOAs, and insurers may have their own rules. We cannot say what applies to your property, so check with your landlord, management, or local building department first.
Should I replace my deadbolt or just rekey it?
If the lock works smoothly and you simply want old keys to stop working, a rekey is usually the more economical route. If the key sticks, the bolt drags, the thumbturn is loose, or the lock is damaged, replacement makes more sense.
Will a new deadbolt fit the holes already in my door?
Most of the time, yes. Standard deadbolts are made to fit common bore sizes and backsets. We measure before we start, and if the holes are oversized or off, we can use adapters or repair the door edge as needed.
Can you key my new deadbolt to match my other locks?
In many cases we can, depending on the brand and keyway of your existing locks. Tell us what you have when you call, and we will confirm what is possible when we see the hardware.
Do you do deadbolt installation at night or on weekends in Chatsworth?
Yes. Our phone at (213) 577-1366 is answered around the clock, every day of the year. If it is an emergency, we can secure the door first, and finish a permanent installation afterward if that makes more sense.
Does the grade of the deadbolt really matter?
It does. Higher grades are tested for more abuse and use heavier internal parts. For a front door, we generally recommend a higher grade. For a lightly used side door or outbuilding, a lower grade can be reasonable.
How do I know the locksmith I hire is legitimate?
California requires locksmith companies to hold a BSIS LCO license. Ask any locksmith for it before they start work, and be cautious of anyone who is vague about the company name or who it works for.
More locksmith help in Chatsworth
Deadbolt Installation near Chatsworth
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.