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Crenshaw Lock

Deadbolt Installation in Covina · 24/7 mobile

Deadbolt Installation in Covina, California

Crenshaw Lock Company installs and replaces single- and double-cylinder deadbolts in Covina, California, 24/7. Our fully mobile service comes to your home, apartment or shop, so there is no storefront trip. To talk through your door and get started, call (323) 997-8867 any time, day or night.

  • Mobile to your Covina location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Deadbolt bolt extended into a reinforced strike plate
Open now(323) 997-8867

A deadbolt is one of the simplest upgrades that makes a door meaningfully harder to defeat. A spring latch alone can often be slipped or forced, while a properly fitted bolt that throws deep into a solid strike plate resists both. In Covina, where homes range from 1920s bungalows to post-war tract houses, the right deadbolt depends a lot on the door and the frame it sits in.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar built the business on mobile service. We bring the tools, hardware and know-how to your door. We can add a deadbolt where there is none, replace a worn or sticky one, or swap a single-cylinder for a double-cylinder where the situation calls for it.

We also try to be straight about what a door can support. Sometimes the best advice is a reinforced strike plate and longer screws rather than a new lock. Sometimes the door itself is the weak point. We will tell you what we see before we do any work, so you can decide with the facts in front of you.

How it works in Covina

  1. 1

    Tell us about the door

    When you call (323) 997-8867, describe the door: wood, metal or glass-paneled, whether it already has a deadbolt, and what you want to improve. This helps us bring suitable hardware to the visit.

  2. 2

    Inspect the door and frame

    On site, we check the thickness of the door, the condition of the edge, the existing bore holes, and how solid the jamb is. Older Covina homes sometimes have worn or previously patched frames that affect what will hold up.

  3. 3

    Choose single or double cylinder

    A single-cylinder has a thumb turn inside and a key outside. A double-cylinder needs a key on both sides, which can suit doors with glass nearby but must be weighed against safe exit in an emergency. We explain the tradeoffs and let you choose.

  4. 4

    Install and reinforce

    We fit the deadbolt, align the bolt with the strike, and reinforce the strike plate with long screws that reach the framing behind the jamb. Where needed, we address the door edge so the lock sits cleanly.

  5. 5

    Test and hand over keys

    We cycle the bolt several times, check that the door closes smoothly, and confirm the keys work. If you want, we can key the new deadbolt to match your existing locks so you carry fewer keys.

Need deadbolt installation in Covina?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • Whether we are adding a deadbolt to a door with no bore or replacing an existing one, since fresh drilling takes more work than a swap.
  • The grade and brand of hardware you choose, from standard residential models to heavier-duty options.
  • Single-cylinder versus double-cylinder, and whether you want keyed-alike operation with other locks.
  • The condition of the door and jamb, including any repair or reinforcement needed for the bolt to seat properly.
  • How many doors are being done in one visit, since multiple doors at the same address are more efficient.
  • Time of day and location of the call, as we operate 24/7 and travel to you.

Why Covina chooses us

  • Fully mobile: we work at your door in Covina, and there is no shop to visit.
  • In business since 1987, with owner David Shar leading the technical work.
  • Honest recommendations, including telling you when reinforcement or a door repair makes more sense than a new lock.
  • Experience with older door styles, including the original mortise and rim locks found in 1920s and 1930s Covina buildings.
  • Available 24/7, so a broken or compromised deadbolt does not have to wait for business hours.
  • We test the work in front of you and confirm all keys operate before we leave.

Deadbolt Installation across Covina

Covina is an older, established San Gabriel Valley city, and its housing shapes what deadbolt work looks like here. Around Downtown Covina and Citrus Ave, many Craftsman and Spanish bungalows date to the 1920s and 1930s. Original mortise and older rim locks are common, and adding a modern deadbolt to those doors takes care so the old wood is not split. Small downtown retail and nearby spots like Heritage Plaza and the Covina Center for the Performing Arts also bring commercial doors into the mix.

Move east into Charter Oak (91724) or south toward Covina Hills and you find post-war tract homes, ranch-style houses and larger-lot properties. These often have side doors, garage entries and back doors that were never given a real deadbolt, which makes them a common upgrade. A new owner in Charter Oak might add deadbolts to every exterior door right after closing, often alongside a rekey.

We serve ZIP codes 91722, 91723 and 91724, and reach customers along Azusa Ave, Grand Ave, Badillo St, San Bernardino Rd, Arrow Hwy and the I-10 corridor. Whether you commute from the Covina Metrolink station or work from home, call (323) 997-8867 and we will come to you.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

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Other Covina locksmith services

See all of our Covina services, or our citywide deadbolt installation page.

Deadbolt Installation in Covina — FAQs

Can you add a deadbolt to a door that does not have one?
Usually, yes. We check that the door is thick enough and the edge is sound, then drill the proper bores and fit the bolt. Call (323) 997-8867 and describe the door so we can plan.
Will a deadbolt work on my older Covina bungalow door?
Often it can. Older doors in Downtown Covina may have mortise locks or worn wood, so we inspect first and work carefully to avoid damaging original features.
Should I choose single or double cylinder?
Single-cylinder is easier to exit in an emergency. Double-cylinder can make sense near glass panels but requires a key inside. We explain both so you can decide.
Do you install deadbolts at night or on weekends?
Yes. We are available 24/7 and fully mobile. If a deadbolt fails or a door is compromised, call (323) 997-8867 at any hour.
Can the new deadbolt match my existing key?
In many cases we can key it to match your other locks, depending on the brands involved. Ask when you call and we will tell you what is possible.
Is a deadbolt enough to secure my door?
It helps a lot, but the strike plate, screws, jamb and door itself matter too. We reinforce what we can and tell you if something else is a weak point.
Do you do deadbolts for apartments and small businesses?
Yes, we handle residential and commercial doors in Covina. For rentals, check your lease or with your landlord about lock changes first.
Do I need a store visit to get this done?
No. We are mobile only, with no storefront. We come to your Covina address and do the work there.
DS

Reviewed by David Shar — Owner & Lead Technician

Crenshaw Lock Company has served Greater Los Angeles & Ventura County since 1987.

Last updated 2026-10-12.

Call (323) 997-8867 · Open 24/7