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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon132
    Verified locksmith services reviews

Find Locksmiths in Diamond Bar

Avatar for Fair & Square Locksmith

Fair & Square Locksmith

4.82(
91
)
•Approved Pro

Fair & Square Locksmith

4.82(
91
)
•Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
9 years of experience

Welcome to Fair & Square Locksmith, proudly servicing Orange County and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We pride ourselves in providing profesional quality, honest opinions and fair pricing. We look forward to serving you. Call today! You will not be disappointed.

"Sergio was very professional, prompted and knowledgeable. "

Gary W on October 2025

Welcome to Fair & Square Locksmith, proudly servicing Orange County and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We pride ourselves in providing profesional quality, honest opinions and fair pricing. We look forward to serving you. Call today! You will not be disappointed.

"Sergio was very professional, prompted and knowledgeable. "

Gary W on October 2025

Avatar for Secure LA Lock & Safe

Secure LA Lock & Safe

4.95(
116
)

Secure LA Lock & Safe

4.95(
116
)
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

Secure L.A. will make you feel safe whether it’s at your home or business. We average a 30 minute response time and will not pressure you with scare tactics. We are fully licensed, bonded, and insured and have been locally owned & operated for over 10 years. We value Angie’s List customers, please call us today for your discount. We specialize in lockout services, lock-in, lock replacement, re-key, safe installation, access control system setup, vandalism repair, custom hardware installation, etc. We will provide maximum security for the minimum price.

"Great job; professional, consistent (we have used Gene before) and does a quality job. Thanks, Gene!"

Edward Y on April 2020

Secure L.A. will make you feel safe whether it’s at your home or business. We average a 30 minute response time and will not pressure you with scare tactics. We are fully licensed, bonded, and insured and have been locally owned & operated for over 10 years. We value Angie’s List customers, please call us today for your discount. We specialize in lockout services, lock-in, lock replacement, re-key, safe installation, access control system setup, vandalism repair, custom hardware installation, etc. We will provide maximum security for the minimum price.

"Great job; professional, consistent (we have used Gene before) and does a quality job. Thanks, Gene!"

Edward Y on April 2020

The Patio Door Guy

4.98(
51
)

The Patio Door Guy

4.98(
51
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

You will find many businesses here that will replace your door with a nice new retrofit door. If that is what you want, you won't find one here. We specialize in repairs. If you are like most people, you just want a door that does what it's supposed to do. !!WORK!! That's where we can help. It doesn't take a genius to fix a door, but it does often take a strong back, a certain amount of risk(glass breaks), and some knowledge of the subject, along with at least 1 trip to the hardware store(often more than one). If you are the type that wants to tackle it yourself, we would be glad to offer advise where possible. Most people have better things to do with their time. Leave it to the experts.

"We had 2 sliding glass doors that wouldn’t glide freely. I got a phone quote & repair on the same day! They now function perfectly & the price was so reasonable!"

Karen G on September 2022

You will find many businesses here that will replace your door with a nice new retrofit door. If that is what you want, you won't find one here. We specialize in repairs. If you are like most people, you just want a door that does what it's supposed to do. !!WORK!! That's where we can help. It doesn't take a genius to fix a door, but it does often take a strong back, a certain amount of risk(glass breaks), and some knowledge of the subject, along with at least 1 trip to the hardware store(often more than one). If you are the type that wants to tackle it yourself, we would be glad to offer advise where possible. Most people have better things to do with their time. Leave it to the experts.

"We had 2 sliding glass doors that wouldn’t glide freely. I got a phone quote & repair on the same day! They now function perfectly & the price was so reasonable!"

Karen G on September 2022

Avatar for Guardian Protection

Guardian Protection

4.74(
2,120
)

Guardian Protection

4.74(
2,120
)
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

Protecting homes and businesses since 1950, Guardian Protection is one of the nation's largest and most highly regarded security companies. We provide smart technology, 24/7 professional monitoring, and peace of mind to hundreds of thousands of customers. Our products are installed by experts, monitored by real people, and truly make a difference. We do what we do because of one simple truth: life is better when it's safe.

"We hired Guardian to install our security system at our Washington, DC, business. The service and quality of the work was horrible. We had cameras and an alarm system installed; it was a relatively large system. They outsource most of the work to various vendors. They could not manage their vendors; what was supposed to take a week took two months. The sales rep did not return calls, and you could never get anyone in management on the phone. Random people would show up at unannounced times. The few things that an actual Guardian employee did were they made a huge mess of our newly remodeled office and were rude to our staff. We have offices in five markets across the US and have high security at each; we have never had such a poor experience."

William M on December 2024

Protecting homes and businesses since 1950, Guardian Protection is one of the nation's largest and most highly regarded security companies. We provide smart technology, 24/7 professional monitoring, and peace of mind to hundreds of thousands of customers. Our products are installed by experts, monitored by real people, and truly make a difference. We do what we do because of one simple truth: life is better when it's safe.

"We hired Guardian to install our security system at our Washington, DC, business. The service and quality of the work was horrible. We had cameras and an alarm system installed; it was a relatively large system. They outsource most of the work to various vendors. They could not manage their vendors; what was supposed to take a week took two months. The sales rep did not return calls, and you could never get anyone in management on the phone. Random people would show up at unannounced times. The few things that an actual Guardian employee did were they made a huge mess of our newly remodeled office and were rude to our staff. We have offices in five markets across the US and have high security at each; we have never had such a poor experience."

William M on December 2024

Avatar for Door Dr

Door Dr

4.92(
194
)

Door Dr

4.92(
194
)
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

Please call me 626 285 3667 or direct email to [email protected]. Any other type of contact such as fax, text, Angie's List message center... just doesn't work, sorry. Thank you for understanding. Award winning.

Please call me 626 285 3667 or direct email to [email protected]. Any other type of contact such as fax, text, Angie's List message center... just doesn't work, sorry. Thank you for understanding. Award winning.

Avatar for Doctor Locksmith

Doctor Locksmith

4.83(
152
)

Doctor Locksmith

4.83(
152
)
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

Doctor Locksmith offers 24/7 hour locksmith service in the Los Angeles and surrounding areas. Our knowledgeable staff, commitment to excellent service and reliable performance is your assurance of quality work,at affordable prices. We offer all Residential, Commercial and Automobile locksmith services. Wide selection of high security locks and architectural hardware as well as imported. we provide a same-day service, on average within 20-30 minutes. Call us today for an estimate!

"very well and professional"

Debra M on June 2020

Doctor Locksmith offers 24/7 hour locksmith service in the Los Angeles and surrounding areas. Our knowledgeable staff, commitment to excellent service and reliable performance is your assurance of quality work,at affordable prices. We offer all Residential, Commercial and Automobile locksmith services. Wide selection of high security locks and architectural hardware as well as imported. we provide a same-day service, on average within 20-30 minutes. Call us today for an estimate!

"very well and professional"

Debra M on June 2020

Avatar for 101 Locksmith

101 Locksmith

4.90(
41
)

101 Locksmith

4.90(
41
)
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

101 Locksmith established to provide fast and professional and loyal service to the Los Angeles County. At 101 Locksmith you will find solutions for residential, commercial, and automotive locksmith needs.

101 Locksmith established to provide fast and professional and loyal service to the Los Angeles County. At 101 Locksmith you will find solutions for residential, commercial, and automotive locksmith needs.

ALTADENA LOCK & KEY SHOP

4.91(
75
)

ALTADENA LOCK & KEY SHOP

4.91(
75
)
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

we are a business up and running since 1951. we welcome any commercial ,home and industrial costumers . take all mayor credit card ,checks and cash 4 employes

we are a business up and running since 1951. we welcome any commercial ,home and industrial costumers . take all mayor credit card ,checks and cash 4 employes

Avatar for SANDERS LOCK & KEY

SANDERS LOCK & KEY

5.00(
16
)

SANDERS LOCK & KEY

5.00(
16
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Local Locksmith specializing in Auto, Residential, and Commercial locks and keys.

"Very helpful! Because they don't normally do that, they just do towing for cars and trucks but they helped me. They didn't have to help me but they volunteered to help me."

joanne a on October 2019

Local Locksmith specializing in Auto, Residential, and Commercial locks and keys.

"Very helpful! Because they don't normally do that, they just do towing for cars and trucks but they helped me. They didn't have to help me but they volunteered to help me."

joanne a on October 2019

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Showing 1-10 of 532
Locksmiths questions, answered by experts

Standard residential deadbolt locks come with a steel bolt that locks your door into place using a key (or keypad) on one side and a thumb turn on the other. When you lock it, the bolt slides into a strike plate on your door jamb to secure your door shut.

Keyless locks are often considered safer since they’re protected by passcodes instead of a physical key, making it harder to be picked. However, they are not infallible. And like all electronic devices, outdated models are more prone to problems and safety concerns. If you’ve experienced multiple lockouts in the past year, or your lock is responding slower than usual after you key in the passcode, it might be time to upgrade to a newer one. Even if your lock is working fine, you should still change your access code at least twice a year.

There is a reason many commercial garages and storage facilities have roller garage doors. They stand out as one of the most secure options due to their unique design. The compact installation and absence of visible leverage points on the sturdy aluminum curtain make them a formidable obstacle for potential intruders. 

A smart lock is a variation of a traditional lock, and since it uses similar locking mechanisms, it’s technically not any safer. The difference is that a smart lock requires a login instead of a physical key. Some smart locks have added safety features, like shutting down after too many attempts with the wrong code. Some smart locks are considered harder to pick than traditional locks, which can further deter intruders.

Begin by checking the power source, typically a battery or wired connection. Ensure the battery is installed correctly, has sufficient charge, and isn't corroded. If it's a wired lock, examine the electrical connections to confirm they are secure and free from damage. Additionally, inspect the lock's programming or settings. Confirm that user codes or access credentials are programmed correctly and that any remote control devices are paired and functional.

The Diamond Bar, CA homeowners’ guide to locksmith services

From average costs to expert advice, get all the answers you need to get your job done.

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